e30 325is rough driving

[Smitty325e]

hey

i just took my 88 325is out for a drive and it was fine for the first couple minutes and then as i pressed the gas pedal it wouldnt do anything while in gear (with a load on) but it would increase rpms when in neutral. not really sure whats wrong here. as i drove home it dissapeared i guess as the engine got warmer it went away. after that it was fine and i drove it for a while after going home. Any comments? i checked the air intake boot for cracks and a bunch of other hoses for vacuum leaks. not sure what else to do....

Mark

[witeshark]

How's the fuel filter? Maybe there was a bit of moisture in the fuel...

[Hexley]

That sounds sort of like what was happening to my 89 325i before I had to replace the transmission. Does the transmission fluid look/smell ok?

[Smitty325e]

ya the transmission fluid is fine, when i bought the car i changed all of the fluids. so im not really sure, i bought a new engine temperature sensor for my 325e and put it in my 325is so maybe thats it, im gonna try to put the old one back in and see if it changes the stutter when its cold.

[silversled]

wait a minute...you say you have 325is...no 325is has an automatic transmission...then it's a 325e...which is it...I'd pick a story and stick to it....

[Smitty325e]

haha ya sorry im just saying i took a sensor from my other car. its the325is which is the car that is stuttering when cold. and the 325is is standard. i just put a sensor from the 325e into the 325is to see if it would make a difference

[Smitty325e]

ya im stumped on what it could be, it still stutters when its cold and goes away when it warms up. i did the on board diagnostic test and got the 1222 lambda code and checked all that stuff. i have no clue what is wrong and its really starting to piss me off. any more ideas?

[325isBMW1988]

my 1988 325is had the same problem. i checked everything and still couldnt find the problem. i figured it would be a sensor so i went on a shopping spree and bought just about every sensor....but still a bad running bimmer. so i finally checked the fuel pump and it was halfway on!!! i bought a used pump off of ebay that fit my car and its been fine ever since! (if it is ur fuel pump and u do decide to get one from ebay make sure it is the exact same one that u pulled from ur car, theres alot of "ghetto" pumps on there so watch out!)

hope this helps a little!

[Smitty325e]

ok thanks i guess thats the next thing to check. but i dont understand why it would only do it when its cold though? ill let you know how it goes thanks

[325isBMW1988]

yea thats why i didnt check it either. my fuel pump was halfway on so it was still getting gas just not what it needed