Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Please note that it is not permitted to have referral links posted in your signature. Keep these links contained in the appropriate forum. Thank you.

https://www.boards.ie/discussion/2055940817/signature-rules
Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

2000 Corolla E11 4ZZFE Over Revving in Neutral

  • 17-01-2023 7:17pm
    #1
    Kaisersosay
    Registered Users, Registered Users 2 Posts: 90 ✭✭


    Hi All,

    Really appreciate any advice on this one.

    I have a 2000 1.4 Corolla E11. Manual. 207k. Bulletproof.

    Had my NCT last Saturday. For the high idle emissions test the engine needs to be held at 2700 rpm for 30 seconds in neutral.

    Car failed as it wouldn't hold the rpm.

    So I tried it myself afterwards.

    It holds the revs to approximately 2500 rpm and then when you throttle to 2600 the rpms climb to 3400.

    1. It only over revs when the engine is up to temperature.

    2. When cold it is possible to hold the rpm at any number. Checked this multiple times.

    3. It does not over rev when the car is in gear and driving.


    So far I have

    1. Cleaned the throttle body

    2. Cleaned the MAF sensor.

    3. Checked the hoses for leaks.

    4. Removed the Idle Speed Control valve and ensured it isnt stuck. It stuck on me in the past.

    5.. Put an obd11 scanner on the engine and there are no error codes.

    None of these have worked so far.

    Has anyone seen a similar problem online or even had the same issue?

    I replaced all valves 12 months ago and also carried out the DIY piston upgrade with new rings, at the same time, and its not burning a drop of oil since. Hope someone can help.

    Have had her from new and be a shame to let her go at this stage.

    Post edited by Kaisersosay on


Advertisement