Question about 2004 Toyota Corolla

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Flat spot after deceleration around 2000 rpm 54 plate 1.6 corolla petrol

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  • Steven Adams
    Steven Adams May 11, 2010

    Hi "Bendy Bob"!!



    I wonder if you could just clarify what you mean when you say "after deceleration".



    Do you mean engine speed deceleration during gear changes, or actual road speed deceleration after braking or coasting down.



    And, when is the problem apparent? Is it before or after warm up, or all the way through the temperature range?



    My initial thought is a sticking EGR valve, but I look forward to your reply.



    Very best regards



    Geordie

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4 Suggested Answers

pal03246
  • 705 Answers

SOURCE: I have a 97 Nissan

Check your Throttle Position Sensor. By what you are describing, this is an automatic trans. I would check the throtle position sensor. remove it and feel it, while you move it/open it and close it. it should feel nice and smooth throughout the sweap. It should not bind or get tight and loose again. If it does, replace it and adjust it to .5V.

Posted on Jul 27, 2008

  • 2 Answers

SOURCE: vw bora 54 plate 1.6 petrol engine runs for about

Probably your throttle positioning sensor, should be able to get one from your local scrap yard if they have a bora, fairly common problem in petrol vws

Posted on May 18, 2009

BRADLEYFRANC
  • 104 Answers

SOURCE: just bought vw beetle 54 plate 1.8 20v turbo.

it could be the maf sensor,the coolant temp sensor or the throttle body.you will need to have a suitable diagnostic machine connected to read what trouble codes are in the ecu.

Posted on Oct 13, 2009

  • 248 Answers

SOURCE: after cleaning the throttle body it looks to be

When you cleaned the throttle body, did you remove the Idle Air Control valve/motor (IAC)? A dirty or defective IAC can be the result of your problems. The IOAC regulates your vehicles idling under various condictions. Try cleaning it first then replace if needed.

Please remeber to rate this solution. Thanks!

Posted on Feb 05, 2011

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