e39 523i misfiring, wont accellerate properly

DannyW · 9 Mar 2010 at 23:45

hi guys my 523i has been fine for 3000 miles since i bought it but this week when pulling up the the lights the revs have dropped so low its nearly stalled then it picks its self up and has been fine. Tonight i went out and at like 30 mph in 4th gear when i try and accellerate it just goes very juddery and shaky and doesn't get faster. Pulled over turned it off and back on agen and it seems fine but the revs still drop too low when pulling up at the lights.

Could it need new spark plugs? Dont know when they were last changed

I know its had a recent cam or crank shaft sensor i can't remember which

Any other suggestions?

DannyW · 9 Mar 2010 at 23:47

[TW]Fox;16125133 said:
Whack it on Ebay, say its in full working order. Refuse test drives.

no i like this car gonna keep it awhile

DannyW · 10 Mar 2010 at 01:33

ok thanks very much for that

it could be a blocked fuel line or filter because it was run out of petrol a few days ago

DannyW · 10 Mar 2010 at 13:58

Moeks said:
Why did you let it run out of petrol ?

was early hours of morning couldnt find a garage open

DannyW · 10 Mar 2010 at 18:28

changed the plugs and air filter today, the plugs that were in it were BMW ones and it hasn't been to a bmw garage for over 30,000 miles so hopefully this will cure it

thanks again for your help guys

DannyW · 10 Mar 2010 at 21:02

it might be an air leak actually because i found a pipe coming off the inlet manifold that had lots of insulation tape around it

DannyW · 11 Mar 2010 at 17:06

the taped up pipe is near the middle of the inlet manifold, gonna try take it off and try seek a replacement

done around 100 miles since changing the plugs car seems to be fine so far but still dont trust it and scared of breaking down lol