engine problem

[Alpine]

can anyone help me out with this one?

started the car today (from warm) and took ages to turn over (6 or 7 attemps). When it did catch it was only just and there was a sort of popping noise with erratic revs (felt as though it was going to stall). It then settled down to turn over at about 1,500 revs and then after a couple of minutes the revs dropped to turn over at 750 revs which is where it usually is, and then it was fine.

This has happened twice now in the last couple of days and coincides with having travelled over x-mas from Leeds to Stoke and back, which is the furthest I have ever been in the car.

any ideas?

 

[Guest]

check this out: http://forums.rennlist.com/rennforums/showthread.php?t=236589&highlight=warm+start

Personally, I'd double check you haven't got an obvious broken vacuum hose or vacuum leak, then try a warm start with your foot on the throttle (if it does start, then you may have a leaky injector)
After that, you're maybe looking at the FPR, reference sensors (heaven forbid, I don't wish that job on anyone), dodgy coil?.

it may also be a stuck ISV. although most of the issues posted lately have been a valve stuck closed, yours may be stuck open meaning a permanently rich running and consequently too rich when trying to start when warm. euqally it may "unstick" itself after a while allowing the revs to drop. It's akin to driving with the choke on in an "old" car. Have you been getting bad economy on runs too?

 

[sawood12]

750rpm is a bit low for a 944. Idle should be around 850 to 900 rpm. My car used to idle very low (always started fine though) and didn't like crawling in traffic at low speed - it kept on kangarooing. It turned out to be my AFM so if vacuum hose leaks don't turn anything up get your A/F mixture checked with an exhaust probe - mine turned out to be too low and as soon as my AFM was replaced (the adjustment screws had no effect so I had to replace the AFM) and mixtures set up again it was purring like a kitten.