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On cold startup my 2005 2litre petrol nissan lafesta revs to 2800 rpm quickly then drops back. This seems excessive. Any ideas how to adjust?

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  • Kevin Naish Oct 30, 2012

    Thanks for the replies. they will be helpful.I should point out that this high revving only happens on cold startup& the revs quickly drop back to normal. The car runs great & on hot startup it sounds normal with no excessive revs.

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  • 61 Answers

Try to fix your ecm ground,

Posted on Oct 30, 2012

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SOURCE: my 1987 turbo toyota supra

The throttle position sensor has an idle switch in it that tells the car's computer that the throttle is positioned at idle. If the idle switch sticks in the idle position, the computer will not allow the engine to rev more than 2500 rpm. In your case, I think the switch is stuck.

First, see if you can get the trouble codes to come up. Rig a jumper wire and jump between the "T" terminal and the "E1" terminal in the car's "Diagnostics" box. It is a small black box on the driver's side of the engine compartment near the battery. Open the lid and on the inside of the lid it has a map of the terminals.

Once you hook up the jumper wire, turn the ignition switch to on but do not start the car. If there are codes, the check engine light (orange) will blink the 2 digit code. It blinks the first digit, pauses, then blinks the second digit. The code for the throttle position sensor is code "41". That is, four blinks...pause...then one blink. If this code comes up, change the throttle position sensor. (If there are no codes, the check engine light will steadily blink once per second until you turn the key to off.) Don't forget to remove the jumper wire when you are finished.

Posted on Apr 11, 2009

  • 7 Answers

SOURCE: i have a 2000 nissan maxima and the problem that i

Idle air control valves short out all the time on these models. You can ohm the motor to check it, but the down side to a shorted iac valve is that it shorts out the ecm if not repaired quickly. when the valve shorts, 12 volts is supplied directly to the ecm and burns the circuit board. The other option is the air flow meter, this is also a very common problem but typically a p0171/p0174 would be stored in self diag.

Posted on Jun 22, 2009

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SOURCE: 2003 Corolla Winter Cold Start Issue

Don't have a good answer to your problem but the items I'd change would be the coolant temp sensor and the manifold air temp sensor if yours has one. Both will influence the condition you have posted. Also, the rpm's you noted are on the high side of safe on normal cold starts but because in extreme cold the engine oil takes a while to get where it needs to be, I'd consider using a good synthetic. It flows easier and stays on parts without draining off, giving a bit more protection.

Posted on Sep 17, 2009

elix0411
  • 3530 Answers

SOURCE: 4D56 turbo diesel engine in

Welcome to Fixya
Error 41 is the butterfly spindle in the intake manifold just below where the hose from the intercooler joins. It should be open when engine running if it is closed it will cause boost issues and running problems.
Thank you for using Fixya!

Posted on Jun 11, 2011

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