Starting Prob

[johnk]

I have a problem starting my car up. Usually if its been sitting for more than a couple of hours its fine. But if i shut down and come back soon it wont start. If i pull the MPI fuse i can crank it enough to get it to start, sometimes 10-30 seconds of cranking is required Then when it starts an enormous cloud of black smoke envelopes my car. In order to start it I have to keep it floored and then pulse it till the engine clears up. It will stall if I don't and runs very rough for a 10-20 seconds after the cloud clears. The cloud is just like a burst not a constant or once running. My first guess would be an oil leak possible from the valves and not the rings cause its seems to leak after shut down. My compression also checks out good and even across the board 140-150 on all cylinders. Any suggestion on what it is and would an oil leak cause a starting problem??? If it is my valves how would i go about checking that? A rebuild will cost 300-400 bucks so I'd like to be sure about it being the problem.

 

[02BLUR]

black smoke = running to rich
blue smoke = burning oil
sounds like a fuel problem.
get a tune up

 

[johnk]

That what i thought my problem was before cause it was stinking like fuel everytime. But i replaced my nijectors and fuel pressure regulator they were stock replacement parts i havent done any modding yet cause i cant get the damn thing to run reliably enough to be my daily driver yet. Where else can i have fuel problems? My vacuum line on the FPR is hooked up. The fuel filter is looking old and crusty but I dont think that one would cause flooding. I have a fairly new (6 months) O2 sensor hooked in to my APexi Turbo Timer. It reads a 14.5 A/F on the occassion that the voltage starts to cycle. Majority of the time the idle runs really high 2-2.5k. The idle is normal when my O2 is cycling. My car does lose oil about a quart every 2 tanks of gas.

 

[02BLUR]

do a compression test
maybe that fuel filter.
Last resort: see if some place will plug into the ECU for you.