hot start stall

[JHZR2]

Hello,

My 91 318i has 114k miles. It runs great except in one instance.

If it starts cold, it starts perfectly - no issues. If I get the car up to full temperature, shut it off, then re-start it, it will catch and then die within a few seconds. If I do this again and again, this will happen over and over. However, if I start it hot, idle it at 3000RPM or so for a few seconds, then it will idle smooth and will not be a problem again at all, until I re-start it again in the same fashion.

I have a new fuel pump (the old one was a bit noisy), and I have the check valve on the fuel line. I have new injectors (not necessary, but I thought I could quiet a tick which I couldnt), a new ICV and O2 sensor within the last few years.

The car runs great and yields good fuel economy. No problems with power, operation up to redline, etc. AC blows cold, though the idle is stronger and more consistent with the AC on. The car is great besides a parasitic load on the battery which seems as if it may be a bit troublesome - and Im working on. It is irrelevant, as Ive had this issue for longer than Ive had to bother with this battery load.

Any thoughts???

Thanks,

JMH

[AcSchnitzer318is]

There are a couple of threads on this issue now.  About 10+ ppl with it.  No one has figured it out yet.  I have had the problem since I bought the car a year ago.  I've changed a ton of stuff, but no luck yet.  Check out "bad idle" and "car running in limp mode" threads.  If you do figure it out... have a heart and post the solution

[deltaneo1]

Has the car ever overheated befor and dose it get close to overheating when you drive it for a wile (Not on the high-way)? Is there any smoke coming out of the tail pipe when you start it cold or hot? well all i can tell you from that that something is expanding when its hot making it get less fuel or air.... if its overheating or close to it check the CAT... (i say that alot)....  but the CAT can make a loses in power and cause over heating... it might be cloged and couse to much back pressure and makeing it not want to run at idle.... but might want to look for a vacuum leak ...  
BUT JUST AN IDEA

[txleadfoot]

Mine does it too...on a fresh rebuild.  I remember reading either on this forum or r3limited about a (factory update) one-way stop valve that mounts at the fuel pump to keep the fuel supply line primed.  I wonder if it's a fuel issue?