Jump to content
Ultimate Subaru Message Board
Sign in to follow this  
sirtokesalot

extremely rough idle 87 bmw 528e

Recommended Posts

yay no more snow. I took the bmw out for the first time this year since
it started snowing all in all things went well however i am experiencing
a very rough idle seems like its missing at idle smells like rotten
eggs and gas smell from the exhaust its so bad that when in gear the
whole car is shaking. Ive been looking over it for the last few hours
now and found a vacuum leak witch i fixed but the idle is still
horrible. it seems to drive fine when the rpm is up i can feel a
hesitation/miss every so often while driving with light throttle input.
what should i look at? the car is a 1987 bmw 528e running motronic 1.1

Share this post


Link to post
Share on other sites

its been sitting a few months it had no gas when i parked it and i put 30 bucks gas in it 2 days ago when i got it back on the road. it is fuel injected

Share this post


Link to post
Share on other sites

i believe it is working i took it off and cleaned it out the idle is not hunting just really choppy. if i unplug the iacv the idle starts fluctuating up and down when plugged in it evens out.

Share this post


Link to post
Share on other sites

updates i changed the plugs because they looked really bad also put some lucas fuel injector cleaner int he tank it seems to run a little smoother now but idle is still way off i believe im hearing a backfire every so often through the intake. i checked the afm the flapper door is not stuck checked the coolant temp sensor by switching the plugs on the 2 sensors the car has one for the ecu and another one for the gauge both are the same. video shows fuel pressure and u can hear the way it is running. sorry for the poor quality my phone did not want to focus.the idle way going up and down on its own a bit. when i put the gauge down i was reaching for the throttle because the idle was getting too low and i thought it was going to stall.

http://vid163.photobucket.com/albums/t290/estatesbburnin/20150405_124243_zpsld0hx3ve.mp4

Edited by sirtokesalot

Share this post


Link to post
Share on other sites

so i took it to someone from a bmw forum yesterday and we detemined the o2 sensor was bad he gave me a sensor witch i chanegd and have to go back to him again to adjust the fuel mixture because its running rich

Share this post


Link to post
Share on other sites
i believe i have solved the problem. i went and
bought a cigar and blew the smoke into the intake until i saw smoke
coming out around the injectors i went and got 6 new o-rings and
installed them no more rough idling no more missing at idle the issue is
gone.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

×