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Thread: Toyota SE Saloon 3ZZ-FE RPM Drop problem

  1. #1
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    Default Toyota SE Saloon 3ZZ-FE RPM Drop problem

    I have a 2004 SE Saloon automatic with 1,20,000 KM done. It has devloped a fault that if i increase engine rpm to 2000 or above, then if i release the accelerator suddenly, RPM drops to almost zero.Sometimes even the engine stalls & sometimes doesnt. No engine warning light turns on. Starting & idling of the car is perfect but the problem is occuring once accelerator is released from high RPM.I took it to toyota capital motors islamabad. They connected the OBDII but couldnt find anything. They changed plugs (K16RU-11), air filter, flushed fuel tank, changed fuel filter, changed fuel pump, cleaned throttle body but same fault still exist and they are unable to trace it. Toyota capital says that they wont b able to find the fault unless the ECU gives some trouble code.
    I m thinking to replace throttle body and crank shaft position sensor one by one since one of them is culprit as far as i think.

    Can any expert help me out???
    -

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    Default

    is it on petrol?
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    Default

    You need to clean the MAF and it'll work just fine!

    Regards,
    MSKHAN
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    Default

    The problem is probably with the Idle Air Control Valve. Get it cleaned.
    Never argue with an idiot, they drag you down to their level and beat you with experience.

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    Default

    My car does not have CNG & its totally on petrol. MAF is located in air filter box? What is the location of air control valve please???
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  6. #6
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    Default

    Looks like its MAF sensor problem. Clean it with electronic contact cleaner. It will be behind air intake filter.

  7. #7
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    Default

    replace the crankshaft position sensor if it doesnt go away wit the MAF cleaning......
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  8. #8
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    Default

    try cleaning the throttle body and see if any difference at all... if improves and then later on happens again then will have to change it out!

  9. #9
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    Default

    Its the idle control valve. Get it checked
    Keep a cool head and wear seatbelts!

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    ok its on petrol then definitely its the idle control valve as spectra has said^.
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    Default

    facing the same prob in spectra just check air filter sensor and its not working then install the new one then ur prob will solve
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    Default

    is the throttle position sensor (TPS) okay?

  13. #13
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    Default

    @ALL, im also facing the same issue, idling is fine on cold start. Until the warmup of let say after radiator fan startup the RPM start fluctuating between 100RPM - 1000RPM in pendulum way...and then went off after 5,6 swings.
    WhEn ThInGs Go WrOnG, DoN'T Go WiTh ThEm.

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    Default

    Idle air control valve when Erich with gunk does these things . Open it up, remove any rubber parts do spray carb cleaner

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