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Throttle problems, occasional stalls
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elliott90

Posted: Sun Jul 27, 2014 3:38 am

Joined: Apr 29, 2014
Posts: 2
Trade Rating: 0

So my 2006 1.4 petrol 206 is having some issues. I think I've figured out what its doing fairly consistently, basically it is having issues when starting up initially - it either dies instantly or seems to be struggling to get up to idle speed, fully depress the accelerator and it lags, finally revs up, you let off the accelerator and its idles fairly steadily at ~1100 (cold). Once it has started it seems to settle.

However, when driving along if you go for a prolonged period of foot completely off the accelerator - such as going down a hill, when you either depress the clutch the revs drop off like a stone and the engine cuts out OR if you manage to get it into a gear before the engine stalls when you then try and accelerate there seems to be no/very sluggish response for a few second after which it comes back to life and seems to work fine, depressing the clutch now and the engine will idle quite happily.

Basically the throttle response seems to become lazy/absent if not touched for a period of time.

It had it MOT back in June and was failing on emissions (CO only I think), went in with a pre-cat lamba error for a few weeks prior. I think the garage gave me a bit of a run around. They welded the exhaust up first as they thought it had a few small leaks, after replacing the lambda sensor they were saying it still failed (not sure how much I trust this garage though) so they went and carried out a bunch of diagnostics/test replacing parts to try and find the fault.

They have apparently checked and had swapped in some new spark plugs (it had new ones in November, uncertain of brand but I don't think bosch), swapped the coil pack with one from a donor car, send the ECU away to some company who said it wasn't faulty. In the end they decided the throttle body was faulty and claimed to have replaced it with a second hand one and re-fitted the other original parts. Prior to this the car to me seemed to be running reasonably well, although I had previously felt the throttle was unresponsive immediately after start up - but not sure if this is meant to be the case, it certainly hadn't cut out before like it is now doing. It does now idle a bit smoother once it gets to idle, but I guess the lambda fault previously could have roughed the idle.

Any thoughts on where it is best to go next? I'm inclined to think there is a more fundamental underlying problem causing faulty throttle control than this second throttle body being faulty as well.

Cheers.

20Drift

Posted: Sun Jul 27, 2014 11:31 am

Joined: Dec 04, 2012
Posts: 543
Trade Rating: 0

Try cleaning your throttle body: 206info.co.uk/Forums/v...c/t=46523/

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