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Diagnosis please?
Posted: Mon Oct 06, 2008 2:32 pm
by hops3010
Hi everyone
Wondering if anybody can diagnose what might be wrong with my NA. Its a bit sluggish and lacks guts when cold but its fine once its warmed up. Is this a fault on something, eg choke, or is it just to be expected?
BTW - this time I did try a search but couldn't find what i was looking for...
Diagnosis please?
Posted: Mon Oct 06, 2008 2:58 pm
by Okibi
Depends just how sluggish ... but I'd hope you weren't revving it out or trying to put it under much load until she was warmed up anyway.
Diagnosis please?
Posted: Mon Oct 06, 2008 3:31 pm
by hops3010
Okibi wrote:... but I'd hope you weren't revving it out or trying to put it under much load until she was warmed up anyway.
Yeah probably. Its not that sluggish, but its noticeable for about 5 mins. I won't worry about it then, I'll just be gentle with her till she's nice and warm
Diagnosis please?
Posted: Mon Oct 06, 2008 4:12 pm
by Craig
Oxygen Sensor!
Diagnosis please?
Posted: Mon Oct 06, 2008 4:18 pm
by sabretooth
AFM, air temp or coolant temperature sensor. I don't think it's the O2 sensor though...
Diagnosis please?
Posted: Mon Oct 06, 2008 4:38 pm
by Fatty
Craig wrote:Oxygen Sensor!
yeah i've heard that a faulty o2 sensor can cause issues like this. it seems counter-intuitive to me tho, coz the o2 sensor takes a while to warm up anyway, so is often not even referenced by the ecu during the warm up period. (ecu just runs off open loop fuel maps). but there ya go.... strange one. i'd also be checking the other sensors sabretooth mentioned as they make more sense to me.
Diagnosis please?
Posted: Tue Oct 07, 2008 12:15 pm
by bruce
It's buggered. But seeming I'm such a nice bloke, I'll give you a tenner for it...
Diagnosis please?
Posted: Tue Oct 07, 2008 2:20 pm
by ampz
One more curve ball...
I would check that your IAC (Idle Air control) valve is operating correctly.
Primarily check the little hose underneath your throttle body as well.
Cheers
Nuno
Diagnosis please?
Posted: Wed Oct 08, 2008 4:00 pm
by hops3010
Well thanks for all the advice... I think! Given that some of you say its buggered and I can't understand what the others are on about!!
Its not a biggie but the first time I noticed the problem was the morning after its last service when it was tuned. And its absolutely fine once the car has warmed up.