Just bought a 1988 E30 M3...it has been sitting 10 years in a back yard.... engine starts but it is really hard to make it start......some times too much fuel and some times no fuel at all in the system.....when it starts it accelarate alone from 1,000 rpm to 2,500 on an off and cant make it to accelerate straight.....i mixed about 2 gals of old gas with 7 gals of new gas......what may be the problem ?? i have spark ! and sometimes thei njectros pulverise ans sometimes they do but not all of them.....computer problems ?

Try all fresh gas, new spark plugs... Injectors... All new fluids

Or just sell it to me :)

+1. change the fuel filter too.

That car is done :shifty:

Il be coming to pick it up


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I'll take her off your hands.

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Sitting for 10 yrs...it could be anything.
Make sure all the hoses, fuel and electricals are intact.
Air- no big air leaks (like intake hose that goes from afm to intake manifold). Afm works.
Fuel- need fresh gas. Check fuel lines, tap injectors to make sure they are working. After 10ys I'd bet they are all over the place (stuck close, leaky, stuck open).
Spark- fresh plugs, if it starts for a bit, I'd put the computer last on the list icv prob crapped, throttle switch (?) could be messy too.
g/l

it starts great at this time.....now the problem is when idle and i press the gas, sometimes it accelerate and some time it just stay at idle speed......also some times i aceelerate and it takes 5 seceonds until it realy accelerate......what may be the problem....?

Besides bad gas and problems with that(geling in lines etc) i would check vacuum lines for dry cracking, check fuel lines for physical damage etc. More than likely i would remove the entire fuel system and have it cleaned(lots of fresh gas and rags). I would then remove plugs and replace, add some fuel system cleaner and run the hell out of it. Ive seen old cars that have sat for a long time run like new after a aggressive highway run to burn and blow all the crap out

Any videos of the current issue?

i went to the garage today....car starts great and engine seems to work mint when cold, but after 5-10 minutes that it starts to get hot the same problem comes again !!!!... when i press the gas it doesnt accelerate..may the computer be locking some signal or something ? vacuum lines OK, fuel lines new. HELP !!!!!

MStuning....can you please send me your email so i can send you a video tomorrow ???...

MStuning....can you please send me your email so i can send you a video tomorrow ???...
Would be helpful to see a video of your RPM's . A bad 02 sensor or a bad throttle switch would make throttle response slow...
PM sent with email.