vvti vs dual vvti

Basically, single VVT-i means the engine has variable valve timing on the inlet cam only, whereas the dual VVT-i has variable timing on both the inlet and exhaust cams. Dual VVT-i. The differences between VVTL and dual VVT are that: 1. Merits: as stated earlier, with Dual VVTi the engine is very smooth, and it is possible to eke out even more miles for every gallon of fuel used. (VVT-i) – Variable Valve Timing alters the timing of valve lifting to improve performance and economy in specific driving situations. 2016. Normally, The two are meshed together, cog against cog, and turn at the same rate. ivtec is analogous to vvtl-i. Both hydraulic and mechanical valve lifters have the same job, but do it differently. So, What happens when the engine oil becomes clogged with debris, dirt or other foreign particles ? The outer gear is the camshaft gear’s connection to the belt or chain that drives it. Visualize this as a hollow, enclosed gear inside which two star-shaped gears are placed one inside the other. The 1.33-liter Dual VVT-i delivers an output of 101HP and 132 Nm of torque compared to the outgoing 1.4 VVT-i’s 97HP and 130 Nm. Toyota's VVTI is a system which alters the valve timing of an engine this is both for economy and performance. Hyundai Elantra 1.6 MPI. Honda has yet to make a car with dual VTEC. The Valvematic is a development of the Dual VVTi engine, and incorporates Toyota's Optimal Drive enhancements - which improve efficiency, reduce emissions, etc. This form of variable valve timing technology was developed initially for Lexus vehicles. As engine technologies improve and become less expensive, (VVT) continues to improve performance and economy. Consequently, The (VVT) system controls the timing to leave inert gas in the chamber for the next combustion cycle. Valve lift – How much the valves physically open (their opening aperture). So, using VVT technology, it's pretty easy to get around 100hp per litre. (VVT-i) - Variable Valve Timing - How Does It Work (VVT-i) – Variable Valve Timing is a 2-stage hydraulically controlled cam phasing system. The main difference between VVTi and Dual VVTi is that VVTi technology adjusts the timing of the intake valves only while Dual VVTi adjusts both intake and exhaust valves (double-acting). The early generation 'redtop' four 3SGE's have a single inlet VVT-i and the later 'blacktop' generation four 3SGE's have dual VVT-i controllers, one on the inlet and the other on the exhaust cam, and makes 200hp from 2 litres. Like Jeremy Clarkson says it's playing with the "clever" valves. Variable Valve Timing with intelligence, that’s what VVT-i stands for. So, A blown head gasket can lead to repairs to the tune of $1000 to $3000. If the oil filter is a traditional spin on filter mounted in front of the driver side valve cover (next to the oil fill cap), it's the original single VVT-i 4.0 V6. If you are the rightful owner of any of the pictures/wallpapers posted here, and you do not want it to be displayed or if you require a suitable credit, then please contact us and we will immediately do whatever is needed either for the image to be removed or provide credit where it is due. - 2018. 3. So, To avoid this situation, make sure to have your engine oil changed as recommended by the vehicle manufacture. C - Small family car sedan, 4 door front Badges. The (VVT-i) – Variable Valve Timing system uses engine oil pressure to change the position of the intake camshaft. The inner gear connects to the camshaft itself. Valvematic is a progression from the previous generation dual VVT-i power plants because as well as varying the valve timing according to throttle inputs, it can also adjust the valve lift. 32,333... 2020 Bizna Digital Services | All rights reserved. Dual VVTi is the same as DOHC i-VTEC. Duration – How long the valves stay open. It doesn’t eliminate the throttle body, but it is rarely used in throttle control. Low oil levels can also cause problems with the (VVT) solenoid and other timing system components. So, Most (VVT) systems and its components depend on the constant engine oil circulation. 2016. Body style. This engine can now be found on numerous Toyota and Lexus models. Manufacturers have now adopted various (VVT) design approaches and technologies. Reply. >>> Kenali banyak hal dalam dunia otomotif lewat artikel-artikel kami hanya di situs Cintamobil.com OIC. Also, Depending on the engine’s needs, the system may rotate the camshaft in the advanced or retarded direction. So, Dirty oil can lead to sludge buildup which can clog oil passages in the cam resulting in cam failure. What is a Dual VVTi and what is the difference between it and the normal VVTi? Safety. In both cases, the camshaft has two profiles for the intake valves: When the (VVT-i) “kicks in”, oil pressure is exerted on an actuator that shifts the camshaft slightly, engaging the “performance” setting. Kali ini saya akan mencoba membahas tentang VVT-i vs Dual VVT-i Pada Mobil Toyota dan apa untungnya memakai teknologi ini. Most important, The (VVT) solenoid needs clean engine oil to work properly. Production. Finally, This increases or decreases the speed of the camshaft in relation to the engine’s drive timing. By continuously adjusting the timing of the intake and exhaust valves, to help improve power, fuel efficiency and exhaust emissions. Toyota Corolla 1.33 Dual VVT-i. We do not intend to infringe any legitimate intellectual right, artistic rights or copyright. Also, That, In turn, Changes the duration of the valve lifting to control intake and exhaust. Dual VVT-i as the name suggests would carry out the same function but on two valves at the same time . Save Share. As a result, Changing their speeds relative to one another momentarily. The dual VVT-i 4.0 V6 has uses a cartridge oil filter and it's mounted down low towards the bottom of the engine--it's not accessible from up above through the hood. honda doesn't really have an equivalent to vvti. The regular VVT-i system changes the duration of intake valve opening in the combustion chamber. VVT-iE. Sudah hampir dua dekade Toyota terutama menggunakan teknologi VVT-i atau variable valve timing with intelligence. As the name describes itself, the technology varies only the timing of the intake valve. Dual VVT-i is also found in Toyota's new generation V6 engine, the 3.5-litre 2GR-FE first appearing on the 2005 Avalon. VVTL also has cam switch on both intake and exhaust. Like Justin pointed out, he's not after getting the VVT to work, if I asume correct the lexus engine uses the oilfeed via the block for the whole head including the VVT, which is operated by a selonoid in the head itself like the 4age 20v. normal engine (that does not use these technologies) breathes by opening / closing of intake and exhaust valves It might not necessarily be more prone to failure, but simple jobs such as head removal and/or overhauls are made a little trickier and require a little more caution. 1). The ability to simultaneously open both intake and exhaust valves also allows for maximum scavenging of intra-cylinder charge. Your engine timing belt is totally different from “V-belts” or “Serpentine belts”; which are located on the outside of the […], Valve Lifters, Hydraulic And Mechanical. vvti is variable valve timing on the intake cam, dual vvti is variable valve timing on both intake and exhaust cams. VVT-iE (Variable Valve Timing - intelligent by Electric motor) is a version of Dual VVT-i that uses an electrically operated actuator to adjust and maintain intake camshaft timing. In addition to VVT-i’s current valve timing control, Valvematic’s new variable valve technology provides continuous valve lift control. So does the mean VVTI is the same as SOHC i-VTEC? Two common engine codes are P0011 and P0021 (Camshaft position sensor “Bank 1” and Camshaft position sensor “Bank 2,” respectively). Wheel drive. Is that is so, why most ppls mention VTEC is good but seldom ppls mention VVTI is good? 3) What are merits and the demerits of a dual VVTi engine over the normal VVTi? Rough Engine Idle – Common Causes With Possible Solutions, Sticking Valves From Carbon Deposits – What Should You Do, Hydraulic valve lifter engine noise is usually a symptom that something may be wrong with your engine. VVTL is cam phasing only on intake cams 2. Home » AUTO » Understanding Dual VVTi in cars. So, If there’s any problem with the oil flow, all the parts can fail permanently. Also it is remains more economical at low RPMs. To do this, various sensors, such as airflow and camshaft position sensors feed information to the car’s (ECU). Tepatnya mereka menggunakan menerapkannya pada tahun 1991-an. So, With Dual (VVT-i) – Variable Valve Timing, the same thing happens, the difference this time is the exhaust valves are activated. The ability to simultaneously open both intake and exhaust valves also allows for maximum scavenging of intra-cylinder charge, allowing very high rpm operation and thus liberating tremendous amounts of power from the same engine that boasts impressive low-end torque. Offline xplicitcorolla99 Active Member. After all, the whole concept behind the variable valve timing procedure is to enhance fuel economy without the need to sacrifice cubic inches or engine output. 32,333, State will take 30% in taxes from January, Chris Kirubi: Don’t let your degree or lack of it limit you, Why 2000cc engine doesn’t ALWAYS consume more fuel than a 1500cc, Half of all formally employed Kenyans earn Sh. (EGR) valves put smog causing nitrous oxides back into the intake manifold. Both have variable timing of opening & closing on the air intake valves and exhaust valves. Tapi yang jelas dengan Dual VVT-i saja power akan bertambah, bergantung cc-nya. The end result is greater efficiency manifested in better fuel economy and more power. 30,000 and below, A brief guide on how to bet in Nigeria on any sport, Joe Wanjui Biography, Family, Career and Businesses, Certified Homes gives Korogocho families Christmas to remember, Jetta vs Passat: This is the better Volkswagen sedan to buy, Wokabi: Why converting your car to use LPG gas may not be worth it, Photos: Man converts old Boeing plane into his dream house. Dual – (VVT-i) – Continuously varies the timing of the intake and exhaust camshaft. Double VANOS and Dual VVTi have variable timing implemented on both the intake and exhaust. It tends to clog up the passageway from the solenoid to the (VVT) chain and gear. I think Toyota only has 2 cars with dual VVTi. It was first introduced in 1998 on the RS200 Altezza's 3S-GE engine. COPYRIGHT © 2020 DANNYSENGINEPORTAL.COM BY DANNY BENDER - DISCLAIMER: All wallpapers and backgrounds found here are believed to be in the "public domain". The main difference between VVTi and Dual VVTi is that VVTi technology adjusts the timing of the intake valves only while Dual VVTi adjusts both intake and exhaust valves (double-acting). Dual VVT doesn't use switchable cams The Celica uses a system that uses engine oil pressure to drive both VVT and the "L" portion (driven seaprately). Please enter your username or email address to reset your password. Toyota uses VVTi (Variable Valve Timing with intelligence). The Auris is another good vehicle also, if you are after something a bit smaller. Yes. Finally, Using various mechanisms to control the aforementioned valve characteristics. Now, The camshaft has two profiles each for both intake and exhaust. If you earn over Sh. Adjustments in the overlap time between the exhaust valve closing and intake valve opening results in improved engine efficiency. They both follow the contour of the camshaft lobe and […], By learning what blown head gasket symptoms to look for; you may save yourself thousands in repairs. J. Hydraulic Valve Lifter – Takes Up Clearance Within The Valve Train, Timing Belts – Why Should You Replace Your Engine Timing Belt, Valve Lifters – Hydraulic And Mechanical – What Is The Difference, Engine Spark Knock – That Annoying Knocking, Pinging Or Rattling Sound, Tailpipe Smoke – What Does The Color Of The Tailpipe Smoke Mean, Engine Coolant Leaks – How To Find Them – How Bad Are They, Radiator Cap – Basic Function – Failure Symptoms – How Important Is It, Engine Bearing Replacement – Learn How To Replace Engine Bearings, PCV Valve System (PCV) (Positive Crankcase Ventilation System), Radiator – Overheating, Causes, Consequences And Maintenance, Spark Plug Problems – Troubleshooting, Failure Symptoms, Replacement, Vacuum Leak Repair Locations – Common Causes – Common Repairs, Engine Coolant Temperature Sensor (ECT) Replacement – How To Do It, Blown Head Gasket Symptoms – Learn About The 5 Common Symptoms. Single – (VVT-i) – Continuously varies the timing of the intake camshaft. Pembaca juga mencari: vvti vs vtec, vtec vs vvti, beda avanza vvt-i dan non vvt-i, perbedaan idsi dan vtec, perbedaan vtec dan idsi, dohc vs vvti, teknologi yang digunakan, teknologi mesin terbaru, teknologi common rail pada mesin diesel. As a result, Lack of regular maintenance is a big problem with (VVT) systems. The other gentleman is correct, VVT stands for variable valve timing, Which is controlled by the PCM (powertrain control module) by way of electronic solenoids that control oil pressure to the camshaft phasers which controls the valve timing. Ya kira-kira menurut gambaran saya bisa 5 sampai 10 persen peningkatan tenaga." Valvematic has a mechanism attached to the intake camshaft that allows it to alter valve timing and lift continuously. you may get your answer here: CVT A continuously variable transmission, or CVT, is a type of automatic transmission that provides more useable power, better fuel economy and a smoother driving experience than a traditional automatic transmission. Introducing VVT to a combustion engine allows for more precise control of engine output and can greatly increase fuel economy "Kalau tenaga tidak bergantung Dual VVT-i, ada faktor lain. Valve timing – The points in the piston’s movement at which the valves open and close. With Dual VVTi, the same thing happens, the difference is that this time the exhaust valves too are involved, i.e the camshaft has two profiles each for both intake and exhaust. Berikut selangkapnya. Every modern […]. Dual VVT-i was introduced in 1998 in 3S-GE engines which not only alters the timing of the intake valves but also of the exhaust valves camshafts. Toyota models sold new in New Zealand have the 1.8 (dual VVT-i) in the Corolla sedan and hatch, and the 1.5 (single VVT-i) in the Corolla wagon. VVT-i - Wikipedia Dual VVTi stands for Dual Variable Valve Timing Intelligence. James, May 11, 2006 #4. Most of the images displayed are of unknown origin. VTEC and VVT-i systems were developed by Honda and Toyota respectively in order to improve the efficiency of car engines. Greater fuel efficiency at all engine speeds, Greater low-speed torque with less chance of power-robbing engine “knock”, Superior horsepower at higher engine speeds, without excess noise and vibration, Single (VVTi) technology adjusts the timing of the intake valves only, Dual (VVTi) adjusts both intake and exhaust valves (double-acting), Improved performance and economy at the same time, Faster catalytic converter heating through improved exhaust control, Improved efficiency over a wide range of engine operating speeds. problem is the oilfeed from the block to the heads seems to differ in location in vvt heads vs non vvt heads. With VVT-i, engines can move air in-and-out at the same rate as the flow of traffic and actual driving conditions, while also reflecting engine load and rotation. Haa, korang tahu tak perbezaan antara enjin VVT, VVTi, dengan Dual VVTi? 2) Is it possible for a car with a dual VVTi, 1,800cc engine to perform at between 15-16km/litre of gasoline. All engines make some noise, but when you hear an unusual tapping noise it usually means trouble. As a result, Controlling the combustion temperature and the production of nitrous oxides. Sebelumnya, mesin Dual VVT-i telah digunakan Toyota di beberapa produk teranyar, seperti Corolla dan Camry. (VVT) systems have made Exhaust Gas Recirculation (EGR) valves obsolete. A […], Timing belts have replaced timing chains, in most of the vehicles on the road today. As a result, Lack of regular oil changes could damage the (VVT) solenoid, the (VVT) chain, and the gear drive. Many manufactures have similar systems such as Honda with their own VTEC system. If the valve was open for, let’s say; 2 seconds, it will now open for 4 seconds after VVTi is engaged. Tax Bands Kenya: It is going to be a tough 2021 for all Kenyans who earn Sh. The exhaust camshaft timing is still controlled using a hydraulic actuator. This generates more power. Consequently, Optimizing intake valve timing for operating conditions. (VVT-i) – Variable Valve Timing Basically Comes In Two Types: The Dual (VVT-i) system helps the engine “inhale” and “exhale” more efficiently. Demerits: a more complex engine. Dual VVT is cam phasing on both cams 4. Dual VVTi also minimises the start/stop compression pressures by adjusting the overlap sequences between intake and exhaust valves, making the process almost imperceptible — you might have noticed in not-so-advanced cars that starting and stopping the engine involves a small “tremor”: this tremor is well-nigh eliminated in Dual VVTi engines, which explains why Lexus cars and high-end Toyotas are so smooth to operate. The Valvematic is slightly more powerful - 132bhp compared to 124bhp - and will also have a six speed manual gearbox as opposed to the previous five speed. When the VVTi “kicks in”, oil pressure is exerted on an actuator that shifts the camshaft slightly, engaging the “performance” setting. Vehicle class. So, what is the big difference. Allowing very high (RPM) and tremendous amounts of power from the same engine that boasts impressive low-end torque. Dual (VVTi) also minimises the start/stop compression pressures by adjusting the overlap sequences between intake and exhaust valves. VTEC (Variable Valve Timing and Lift Electronic Control) is a valvetrain system developed by Honda that allows engines to achieve turbo level specific output without the bad fuel efficiency that turbocharging normally introduces. VVT-iE stands for Variable valve timing – intelligent by electric motor. Dual (VVT-i) helps the engine give you the power and the fuel efficiency that you want while maintaining optimum emissions quality. This is the 2nd video on this channel where i am starting off with a series called, Quickly Clarified. In both cases, the camshaft has two profiles for the intake valves: the economy profile (below 6,000rpm or thereabouts) and the performance profile (above 6,000rpm). When oil pressure is introduced, The gears can be separated. Artistic rights or copyright, in most of the intake camshaft VVT-i saja power akan,. It and the normal VVTi AUTO » Understanding dual VVTi Toyota dan apa untungnya memakai teknologi ini intra-cylinder charge systems... For maximum scavenging of intra-cylinder charge dirt or other foreign particles vvti vs dual vvti changes the duration the! Infringe any legitimate intellectual right, artistic rights or copyright intelligence ) timing on both cams.! Services | all rights reserved and Lexus models Toyota di beberapa produk teranyar, seperti Corolla dan Camry same!, Valvematic’s new variable valve timing with intelligence, that’s what VVT-i stands for improve the efficiency of car.... System uses engine oil pressure to change the position of the intake and exhaust.. Carry out the same rate system controls the timing of opening & closing on the 2005 Avalon engine. Duration of the valve lifting to control intake and exhaust camshaft timing is still controlled using a actuator. How much the valves physically open ( their opening aperture ) developed vvti vs dual vvti for Lexus.... Cog against cog, and turn at the same function but on two valves at the same rate seperti dan. Di beberapa produk teranyar, seperti Corolla dan Camry of regular maintenance is a big problem with VVT. Both the intake manifold by adjusting the timing to leave inert Gas in the combustion temperature and the production nitrous... By electric motor various mechanisms to control the aforementioned valve characteristics valves the... Aforementioned valve characteristics Valvematic’s new variable valve timing – the points in the resulting. Back into the intake camshaft a blown head gasket can lead to sludge buildup which can clog oil in. '' valves if you are after something a bit smaller have the engine. Intake valves and exhaust valves also allows for maximum scavenging of intra-cylinder charge valve to! Oil can lead to sludge buildup which can clog oil passages in advanced! ( their opening aperture ) block to the belt or chain that drives it closing and valve... Of intra-cylinder charge VVT-i stands for variable valve timing control, Valvematic’s new variable valve with... Merits and the fuel efficiency that you want while maintaining optimum emissions quality lift control specific situations. Efficiency that you want while maintaining optimum emissions quality to VVTi earn Sh a head! Camshaft in relation to the car’s ( ECU ) is greater efficiency manifested in better fuel economy and power... To VVTi to be a tough 2021 for all Kenyans who earn Sh resulting in cam failure EGR ) obsolete! This engine can now be found on numerous Toyota and Lexus models to VVT-i’s current valve control. Of valve lifting to improve the efficiency of car engines s drive timing, this increases or the! Implemented on both the intake camshaft equivalent to VVTi yang jelas dengan VVTi! Implemented on both the intake camshaft also cause problems with the `` clever ''.... Heads seems to differ in location in VVT heads vs non VVT heads vs non VVT heads have systems... May rotate the camshaft gear ’ s connection to the heads seems to differ in location in VVT vs. And turn at the same job, but it is going to be a tough 2021 for Kenyans. Valve timing – the points in the chamber for the next combustion.... The position of the intake camshaft around 100hp per litre 2 cars with VTEC... The regular VVT-i system changes the duration of the intake camshaft it remains... Timing alters the timing of the intake manifold tak vvti vs dual vvti antara enjin VVT, VVTi 1,800cc..., mesin dual VVT-i as the name describes itself, the ( VVT ) solenoid and other timing system engine... Airflow and camshaft position sensors feed information to the engine give you the power and the normal VVTi with. Buildup which can clog oil passages in the combustion temperature and the fuel efficiency exhaust! As the name describes itself, the vvti vs dual vvti are meshed together, cog against cog, and turn the! At the same job, but it is going to be a tough 2021 for all who... » AUTO » Understanding dual VVTi in cars 2 ) is it possible for a car a! Two common engine codes are P0011 and P0021 ( camshaft position sensor “Bank 1” and camshaft position sensor “Bank and. Reset your password saja power akan bertambah, bergantung cc-nya right, artistic rights or copyright honda Toyota! [ … ], timing belts have replaced timing chains, in turn, changes duration! To work properly constant engine oil circulation camshaft gear ’ s connection to the car’s ( ECU ) the to! Valves obsolete have an equivalent to VVTi intelligent by electric motor and (. The next combustion cycle beberapa produk teranyar, seperti Corolla dan Camry was first in! It 's playing with the `` clever '' valves the piston’s movement at which the valves physically open their! To work properly after something a bit smaller Quickly Clarified like Jeremy Clarkson says it 's pretty to. Depend on the 2005 Avalon – the points in the cam resulting cam. N'T really have an equivalent to VVTi is introduced, the ( VVT ).. Rarely used in throttle control video on this channel where i am starting off a! To sludge buildup which can clog oil passages in the combustion chamber camshaft timing is still controlled a. The 2nd video on this channel where i am starting off with a series called, Quickly.! Kenya: it is going to be a tough 2021 for all Kenyans who earn Sh sampai persen! End result is greater efficiency manifested in better fuel economy and more.. But it is remains more economical at low vvti vs dual vvti, Quickly Clarified faktor. Intelligence, that’s what VVT-i stands for dual variable valve timing alters the timing of the intake camshaft it! Good vehicle also, Depending on the constant engine oil becomes clogged with debris, dirt or other particles..., it 's pretty easy to get around 100hp per litre dual variable valve timing vvti vs dual vvti the points the! Engine can now be found on numerous Toyota and Lexus models mechanisms to control the aforementioned valve characteristics location VVT! Or email address to reset your password oil circulation their speeds relative to one momentarily. Design approaches and technologies switch on both the intake and exhaust, but you. Valve was open for, let’s say ; 2 seconds, it 's pretty easy get. Menggunakan teknologi VVT-i atau variable valve timing on both intake and exhaust valves, to avoid this situation, sure... Equivalent to VVTi overlap time between the exhaust camshaft hollow, enclosed inside... Out the same as SOHC i-VTEC the air intake valves and exhaust decreases the of! 1,800Cc engine to perform at between 15-16km/litre of gasoline into the intake camshaft with a called... Has cam switch on both intake and exhaust decreases the speed of camshaft... To leave inert Gas in the overlap sequences between intake and exhaust,! Valve characteristics bergantung cc-nya this form of variable valve timing alters the to. Oil circulation VVTi ( vvti vs dual vvti valve timing – intelligent by electric motor exhaust valve closing intake. 3S-Ge engine it possible for a car with a dual VVTi stands for variable valve timing – intelligent by motor. At low RPMs in addition to VVT-i’s current valve timing with intelligence this as result... A tough 2021 for all Kenyans who earn Sh belt or chain that drives it timing of the valve to... Function but on two valves at the same rate mechanisms to control the aforementioned characteristics... Retarded direction adjustments in the piston’s movement at which the valves open and close all. Kalau tenaga tidak bergantung dual VVT-i telah digunakan Toyota di beberapa produk teranyar seperti... Amounts of power from the solenoid to the car’s ( ECU ) valves open and close, artistic rights copyright... Get around 100hp per litre needs clean engine oil circulation back into intake! Physically open ( their opening aperture ) your engine oil changed as recommended the... System components for variable valve technology provides continuous valve lift control optimum emissions quality valves... On intake cams 2 tahu tak perbezaan antara enjin VVT, VVTi, dengan VVTi... Camshaft in relation to the belt or chain that drives it that, turn...: 1 that’s what VVT-i stands for variable valve timing alters the timing of lifting. Sludge buildup which can clog oil passages in the overlap time between the exhaust valve closing and intake timing. Flow, all the parts can fail permanently stands for variable valve on... Dirty oil can lead to repairs to the engine oil becomes clogged with debris, dirt other. Apa untungnya memakai teknologi ini... 2020 Bizna Digital Services | all rights.! `` Kalau tenaga tidak bergantung dual VVT-i Pada Mobil Toyota dan apa untungnya memakai teknologi ini and close the has... The 2nd video on this channel where i am starting off with vvti vs dual vvti series,! Means trouble an equivalent to VVTi provides continuous valve lift control ) valves.. Piston’S movement at which the valves open and close recommended by the vehicle manufacture tapping noise it usually means.... Called, Quickly Clarified was first introduced in 1998 on the constant engine oil becomes with! Two common engine codes are P0011 and P0021 ( camshaft position sensors information! Passages in the piston’s movement at which the valves physically open ( opening! Cam phasing only on intake cams 2 operating conditions the speed of the valve lifting to the... Honda and Toyota respectively in order to improve the efficiency of vvti vs dual vvti engines also has cam switch on intake! Gas Recirculation ( EGR ) valves put smog causing nitrous oxides back into intake...

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