HELP ON EXHAUST!!! PLEASE - BMW Forum

BmWNoobie · 09-03-2003, 06:46 PM

Hey SUp.... got sum problem wit my car .....
i got uh 87 bmw 325 e
my bmw been goin crazy i don't know why but it been revin by it self wen i don't drive the car such as i turned the car on n it start revin n afta a while it shuts off.... n wen i try to gas it i have to gas it like fo 2 sec to actually have gas comin out so its been very hard fo me to start up.... n everytime i start off so i have to gas i see a big klump of black smoke comin off of my exhaust ... so i was wondering does ne 1 know ? please give me a hand.... CONFuSED.... i did all kind of things like oil changing, fuel injection , coolant, etc...please tell me wats wrong...

m42technic · 09-03-2003, 07:56 PM

Holy crap dude. Please try and explain what is going on a bit more clearly. I understood like 5% of what you just said.

lwebb12 · 09-03-2003, 09:22 PM

translate to english then we can help you

BmWNoobie · 09-03-2003, 09:27 PM

Bmw 87 325e
This is what happen... ever since like a month ago, when i turn on my car it made this very weird sound which was like someone reving an engine. and after around like 10-30 sec later my car shut down itself. So ever since that happened, every time i turn on the car i gas it a few times so the car wont shut off but i notice everytime i gas it takes around 1-2 sec to actually have gas comin out of the car and i always see black smoke coming out of the exhaust everytime i start gasing but it goes away wen i keep gasing. The reving sound does not only happen when i start the car, also wen im on neutral when im at a stop sign or just lettin my car roll. So do you know wat is the problem ...? is it my exhaust system? i already did oil change, fuel injection, change engine oil, coolant, etc. please help me out here... i been so scared b/c my bmw shuts off wen im in teh middle of a freeway

lwebb12 · 09-03-2003, 09:32 PM

did you change your fuel filter?

BmWNoobie · 09-03-2003, 09:34 PM

i did the fuel injection... which clears out the exhaust system

BmWNoobie · 09-03-2003, 09:58 PM

My friend works at jiffy lube n i brought it there he taught me to use this spray bottle to spray it in to the engine. It's like while im gasing i spray that thing in.... after i let the car run n i saw a bunch of smoke came out of the exhaust.... if it is not that what should i do?

DesmoBob · 09-03-2003, 10:56 PM

Quote:

Originally posted by BmWNoobie@Sep 3 2003, 06:14 PM
i did the fuel injection... which clears out the exhaust system

used

used injection --> clears exhaust ???

used

used

maybe your cat convertor is clogged.

also black smoke could mean you are running rich. look for intake leaks.

look at your plugs. they can tell you a lot about what is going on in your engine. compare them to these pics:
http://www.autolite.com/tech/PlugTips.pdf

RAS-M · 09-04-2003, 07:37 AM

There's always the o2 sensor. They tend to go especially on a late 80's models right about now. I replaced it in both my 86 and 88 325s. The 86 used to keep reving, especially at idle and then die out. You might have a combination of problems, but it is worth looking into your o2 sensor as well.

qcoffey · 09-04-2003, 10:39 AM

I agree with the above post. In any car I have had (6 VW's, 3 Hondas and 1 Mazda) when the O2 sensor failed I had similar problems. The most noticable problem is the vehicle running extremely rich, thus causing the black smoke out the tailpipe. A bad O2 sensor can even cause the vehicle to start real hard, as in my Mazda Protege. I've also had a couple of bad catalytic converter problems in my past vehicles. They also cause driveability problems. A bad 02 sensor can cause deterioration of the catalytic converter, so get your problem checked out. Good Luck.