sm

my e36 318is m42 engine has developed a lumpy/ rough idle, all is fine when driving along its just when u stop it hunts between 1000rpm & 1300rpm, ive checked for air leaks, checked the tps and all seems fine there, removed the icv and gave it a clean, plug leads are 3 months old and have just changed the plugs today, car was fine before i put £20 of fuel in it on fri morning then fri night i noticed the lumpy idle, thought i could of got some bad fuel so i topped up with another £15 of fuel from a different garage this morning and its still the same


any ideas?

AJ_ERST

Serves you right for not having a ford

105epwr

check the breather pipe on the back of the cam cover this normally goes porous and leaks-also follow this pipe which goes back to the inlet manifold its a black plastic "top hat"type thing as we change these as a set!
OR check the induction pipe these can split-between airbox and airflow meter.

SiZT

as well as the above check the oil cap seal hasn't damaged or moved

Mike C

iTrader: (1)

That's what happened to mine with what sounds like exactly the same symptoms. The rubber boot is kinda puckered up, so not immediately obvious if there's a split in it until you fiddle about.

sm

i have s1 which is in the garage with the loom stripped out

cam cover breather is a slicone one and has no splits

other breathers seem fine, spayed carb cleaner around them and no change in idle

air flow meter induction pipe is fine, took it off and checked it and no cracks or holes

Glenn_

iTrader: (1)

Ha ha ha good lad.

BM08

yeah mine was doing this when the induction pipe was split and they will most likely split underneath where you cannot see, so get your hand right in there and feel about for any splits, all my running probs were sorted by this, and the part is about 20-25 quid.

BM08

At least he still got home and can still drive the car, if it was a ford it would be layed up somewhere on a ramp with the bonnet up

sm

induction pipe is fine as ive had it off and checked it all over, was ment to be working on the s1 today but the bloody bmw put a end to that

BM08

If all else fails look on here http://www.bmwowner.com/forum/ you will definatly find the answer on there, as i used to use that forum when i owned my BMW and im certain theres 2/3 page threads on running issues.

Might be worth sticking it on a diagnostics machine aswell? save throwing new parts at it/wasting time

sm

already a member and have a post on there and ive had more replies/help on here than i have there, thats my next step to get all the sensors checked

Mk1-stu

E36coupe lads are pretty good ! ( is the forum my bro uses )