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Old 11-10-2003   #1
 
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Punto 75SX - Erratic Idle (Cold and Hot Engine)

Any you guys got a suggestion on this? The car upon start idle ok for 30-60 seconds. It then starts to idle between approx 500-800 rpm going up and down. This can happen at any time. It also suffers cut outs when coming to a stop. I have changed all filters inc fuel, I have recently had the vehicle worked on by a so called "fiat specialist" (not dealer) who has replaced the cat 3 times cos each 2nd hand one he has used has either been scrap or put on a complete exhaust that was scrap. If cat gone/faulty would it cause this problem? I ask this cos I have a BMW as well and on one of their forums it suggests this as a possible fault. I have also had this prob a while back, a quick blast of redex seemed to help for about 2 weeks. I have cleaned the carb out quite a few times actually. Does anyone know the location of the ICV on these? Would a dirty ICV be a possible fault? Any suggestions on how to rectify this would be gratefully received.
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Old 26-10-2003   #2
 
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May be something to do with the idle stepper motor and the engine management system.

miine can be eratic and refuse to idel at 1000 sometimes.
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Old 27-10-2003   #3
 
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I would put my money on the lambda sensor or the EGR valve (if it has one).


www.puntoforum.co.uk

Evil-Punto AKA Evilution.
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