e30 325se idle problem

[moggie]

hi can anyone help me diagnose what is causing my 325se auto e30 to nearly cut out every time i set off,the revs drop when i go to accelerate,sometimes it does cut out,also when braking to a stop the revs drop very low before rising back to idle thanks craig.

[airborne_7]

check the black rubber pipe that goes from the inlet to the airfilter for cracks between the grooves, could be a possibilty

[moggie]

cant see any cracks thanks anyway

[sunnyr83]

Most probably an air leak or air getting in.

[mtech018]

Most probably an air leak or air getting in.

+1

also check your ICV, maybe it needs cleaning

[capri_rob]

You need to take the black pipe off to check it properly - if its cracked they are about £15 from the dealers - there are several so make sure you get the right one.

[moggie]

ive changed the pipe,checked and cleaned idle valve and still no better,ive also sprayed round anywere that could suck air in with carb cleaner to see if it reved up but nothing,could the spark plug gap cause these symptoms

[steve_k]

i had a similar problem on my sport last year & it turned out to be the blue temp sensor was at fault.

[murran]

does taking the oil cap off while its running effect the idle. taking it off introduces an air leak and should effect the idle. if it doesnt then you had an air leak before, so it makes no difference introducing another 1.
if you have an air leak then it needs finding and fixing!

clean out the throttle body and icv. check the tps is working (multimeter) not just clicking as you move it.
the tps has a habbit of filling with oil from the breather pipe that goes into the throttle body.

[sweep]

What does your car tickover at?

[murran]

have you heard boyracers ticking over at 1300rpm pete? im sure the top ring seal is missing off the breather tube under the inlet manifold. i cant see any other air leak on it and it must be a huge leak to cause it to idle that fast.

[sweep]

Mark did the headgasket john as i refused ,no skim no nothing.

[moggie]

it ticks over about 800,il try taking oil cap off today t see if it changes idle,were is blue temp sensor located