Iain Mac

I've not long been a Scoob owner, a '98 5dr Uk turbo. After around 2 weeks of ownership :-( it lit the Check engine lamp. A "local" Dealer has diagnosed the warning as the Oxygen Sensor, currently waiting for the part. So what does the sensor detect ? overrich mixture? Ps the alarm is cleared by stopping the engine , waiting a few secs then restarting, though strangely it tends to re-occur at light/moderate loadings uphill around 70ish.
PS I dont seem to have the piston slap problem but from what I've read is it a forgone conclusion? motor has 24K miles.

Cheers Iain Mac

Stef

Iain.
The oxygen sensor is also known as the Lambda sensor, and is found at the top end of the downpipe. I believe it measures the air-fuel ratio and sends a signal to the ecu to adjust the fuelling. I have a MY98 with 70,000 miles on the clock, and mine is apparently on the way out, though I don't have any warning lights as yet.
Piston Slap is not a forgone conclusion, but as you approach the end of you warranty I would would do all I can to hear it!!!!

Stef.

AndrewC

This may sound like a stupid question, but what should I listen for when trying to detect piston slap?

AndrewC...

SimonM

Andy,

I wondered this a while ago, but as mine has recently developed it, I can assure you that if you have got it, you will know about it.

My car is at the dealers tommorow, with suspected piston slap, knackered whining gearbox, and a really bad misfire when cold. I thought these cars were supposed to be reliable

I still have 4 months of warranty left though, so I thought I'd get it all sorted

SimonM


[This message has been edited by SimonM (edited 02 January 2001).]

Iain Mac

I forgot to say my dealer said the oxygen sensor was picking up "stray RF" radio signals due to poor shielding design and there's a modified part available. I've since checked mine out and the rubber boot had come adrift by some 2/3 cms from the sensor, reseating the boot has sofar stopped the check engine alert from reappearing and it was fairly regular before that.