lacking power

[E30GAV]

hi guys ive got an 1990 e30 316i.
the problem i got is, wen my car is doing between 3500 to 4000 rpm its mis-firing. and it keeps on doing it.
but in the mornings when the engine is cold, i can stretch the revs out all the way to bout 5500-6000 rpm, but as soon as the engine warms up it sarts mis-firing again.
can anybody help me with this. proper piss take, i get little novas and crappy cars taking me at the lights!!!!

Gav

[Ant]

Hi mate, welcome to the site !

your car has the M40 engine, its is known to have camshaft issues that could cause the above, more on that in a moment

you say the car is fine until warmed up, if the coolant sensor has failed then the engine will be running very rich all the time ( when warm) this would cause a big drop in power output so may I suggest you replace the BLUE coolant sensor on the head ( look under inlet ! ) before anything else.

Now, assuming the above did not make any diff, with the car in neutral and fully warmed up, floor it, if the engine still wont rev over 4-4.5K , then the cam is probably worn out I'm afraid

Try the sensor, and get back to us M8

HTH

[E30GAV]

ye it seems lyk its running proper rich, stinks of fuel hardcore when i put ma foot down. but yeh il giv that coolant sensor a looking at and let ya know what happens! nice 1 mate!
Gav