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b05c0
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Location:
Melbourne
Registered:
April 2004
Engine hunting, any advise appreciated Tue, 22 February 2005 13:19 Go to next message
While in the workshop, my mechanic did the idle tunning cos it sits on high about 3000rpm. I took the car back last week and engine is hunting (that is what my mechanic said)... idle constantly fluctuating between 3000 and 1500. He tried to adjust throttle body and change back to where it used to be but aparently he gave up.. nothing works, nothing he could do. He reckons oxy sensor is sending wrong info to ECU.

Any idea how to fix up the problem? He suggested to bring the car to Dyno and tune ECU (I think I have factory ECU) if they can.

I just installed Front mount cooler. Does this cause any problem?

One of my fren think temperature sensor back for the engine might cause this problem.

Cheers

[Updated on: Tue, 22 February 2005 13:36]

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peeack
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Brisbane
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September 2004
Re: Engine hunting, any advise appreciated Tue, 22 February 2005 14:18 Go to previous messageGo to next message
What sort of engine is it?
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b05c0
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Melbourne
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April 2004
Re: Engine hunting, any advise appreciated Wed, 23 February 2005 00:17 Go to previous messageGo to next message
AE86 with 4age.
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CrUZsida
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November 2003
Re: Engine hunting, any advise appreciated Wed, 23 February 2005 06:28 Go to previous messageGo to next message
Temp sensor can cause a problem, but its most likely an intake leak.

Are you getting full boost?
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IRA11Y
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sydney
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May 2002
   
Re: Engine hunting, any advise appreciated Wed, 23 February 2005 07:15 Go to previous messageGo to next message
recalibrate the TPS
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CrUZsida
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Australia
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November 2003
Re: Engine hunting, any advise appreciated Wed, 23 February 2005 07:20 Go to previous messageGo to next message
I have found that a miscalibrated TPS causes only a couple of hundred revs in hunting of idle. Not a thousand.

But, its worth a try, only takes 30secs with a DMM.
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b05c0
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Location:
Melbourne
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April 2004
Re: Engine hunting, any advise appreciated Wed, 23 February 2005 08:10 Go to previous message
hunting at first gear only and reverse... 2nd, 3rd... are good..

so does dyno tune help to fix up the problem?
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