Help !! Car hesitating @ 3k revs on MY00
09 April 2006, 06:29 PM
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Help !! Car hesitating @ 3k revs on MY00
It was originally hesitating but had no ecu faults.
I replaced the MAF with a known working MAF and it seemed to work for the first mile of driving.
It then returned to hesitating again!!
Is there anything else it could be??
Note : i put my old MAF back on to test it and the ECU immediatly through up the CEL.
I presume this is because it was working under the new MAF and leaned under the new MAF it then realised the old MAF was now broke.
Does this sound correct?
Kev
I replaced the MAF with a known working MAF and it seemed to work for the first mile of driving.
It then returned to hesitating again!!
Is there anything else it could be??
Note : i put my old MAF back on to test it and the ECU immediatly through up the CEL.
I presume this is because it was working under the new MAF and leaned under the new MAF it then realised the old MAF was now broke.
Does this sound correct?
Kev
09 April 2006, 06:40 PM
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silly question but did you plug the MAF back in properly after the second change. Im not patronising you!! ive done this when my head was disappearing up my own backside during fault finding!
09 April 2006, 07:19 PM
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can be a cause of bad idle. But so can a lot of things.. 
Could you describe the "hesitation" further please.
Its hard to understand without detail. Speed revs etc!
I mean how is the car hestitant?
Is it like a "stutter". This could be a missfire or an over boost.
Is it poor response. The list is endless.
Could you describe the "hesitation" further please.
Its hard to understand without detail. Speed revs etc!
I mean how is the car hestitant?
Is it like a "stutter". This could be a missfire or an over boost.
Is it poor response. The list is endless.
Last edited by thedeester1; 09 April 2006 at 07:48 PM.
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09 April 2006, 09:15 PM
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I have the same hesintaion at 3k (MY98 wogon) ** Car feels like your bliping the throtle lightly **
It goin in for a full service this in a fee weeks so will find out if it spark plugs or not. Any one any other idea?
It goin in for a full service this in a fee weeks so will find out if it spark plugs or not. Any one any other idea?
09 April 2006, 09:17 PM
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When i m not boosting, the car juders i.e in between revs!
When i do boost it goes but splutters as iam boosting!
The car idel's perfect and revs up fine!
When i do boost it goes but splutters as iam boosting!
The car idel's perfect and revs up fine!
09 April 2006, 09:32 PM
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could be an overboost. When your driving does the car seem to "missfire" as you acclerate. Not sure what you mean by stuttering between revs?
does the car rev well when stood it wont boost if your stood if its ignition this might help?
does the car rev well when stood it wont boost if your stood if its ignition this might help?
Last edited by thedeester1; 09 April 2006 at 09:43 PM.
09 April 2006, 10:08 PM
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Ok i didnt describe the blipping throttle and just your description in the forums is hard to diagnose.
here is how the wastegate solenoid works. The solenoid is either on or off (i believe) the solenoid is connected to the actuator for the turbo wastegate.
If the wastegate is fully open there is no boost, If its fully shut there is full boost. because the solenoid is either open or shut, to get a level in the middle the ECU pulses the wastegate solenoid. basicly it turns it on and off very fast. when its on less than its off the wastegate is open further. when its off less than its on then the waste gate is closed further. (depending on which way you look at the system!). Im towing now with your diagnostics but im thinking it could be due to the wastegate or the wastegate actuator solenoid. I think its time to take the car to someone in person. Sorry.
There is also the throttle position sensor i think but that shouldnt be affected if the car is stood still and you rev it.
My Brain hurts!
here is how the wastegate solenoid works. The solenoid is either on or off (i believe) the solenoid is connected to the actuator for the turbo wastegate.
If the wastegate is fully open there is no boost, If its fully shut there is full boost. because the solenoid is either open or shut, to get a level in the middle the ECU pulses the wastegate solenoid. basicly it turns it on and off very fast. when its on less than its off the wastegate is open further. when its off less than its on then the waste gate is closed further. (depending on which way you look at the system!). Im towing now with your diagnostics but im thinking it could be due to the wastegate or the wastegate actuator solenoid. I think its time to take the car to someone in person. Sorry.
There is also the throttle position sensor i think but that shouldnt be affected if the car is stood still and you rev it.
My Brain hurts!
Last edited by thedeester1; 09 April 2006 at 10:15 PM.
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