Cranks but no start

[Queball]

HELP, I have a 91 750IL that turns over but won't start. By searching and reading online I found this board. Now a little background, My old girl doesn't like to sit after about 2 weeks I thought I would take her for a spin with no luck. I have check the fuel pumps, Timing chain & All the fuses. Is there a way to test the relays or are they just an R & R item? Thanks in advance

[kandi08]

Alright mate.
Have you got a spark?
Relay should tick noisey, if it's not working.
Sound's like no spark.

[84bmw318i]

same thing happened to me and it turned out that the alternator broke inside the distributor cap.

[Queball]

Haven't checked that yet, It's next on my list along with checking the crank position sensors. The cap and rotors like really good.

[Queball]

I just checked, I do have spark. I guess the next is to check fuel pressure?

[marti5]

Try this it also applies to the 750:

Board Message

Ps. Im a member here its only for 7's worth being a member its free.

[Queball]

I tried the information from this post, It does appear that it was flooded. I did get it started, But now it doesn't want to idle and seems like it is fuel starved. It will run up to about 2500 rpm then die.

[marti5]

Maf sensor???. take it off if it runs the same thats the problem, if so only replace with genuine BMW. Do NOT buy a cheap one they measure the air intake incorrect and just dont work.

[Queball]

Do I pull both units off, Or just 1 bank? Can they just be disconnected.

[Queball]

Thanks for all the help, My old girl is up and running. I did just pull 2 codes from it though, Code 10 (Camshaft/cylinder ID sensor), & Code 52 (Engine drag torque control MSR)

[marti5]

Ok, You would be wise to replace the camshaft sensor if its brought it up, what I would do is run it for a 100 miles or so and see how she goes, then do a diagnostic again, if it comes up again change it or you will only have problems later on.