running really rich!

[ilikebigbutts]

I just got my engine running last weekend but its running really rich...i dont really have time to mess w it that much but here is what i've came up so far:

Car starts up and idles pig rich.It eventualy stalls after 20 seconds running.If i give it gas it completely chokes and stalls.At first i was running no IC pipes but i got them done last nite and still same problem.I could of fouled out the plugs but it doesnt feel like its missing, just runs pig rich.I pulled a couple plugs and they are black.The pistons are soaked in gas.

NO CODES IN MY SUPER MONITOR

I figured the cold start injector was stuck open so i plugged the fuel rail but no differance so cold start is rulled out.

I tested the afm today and all my resistances are high and out of spec except the IAT circuit which was 2k ohms at 78 degrees.a little off but Manual says 2-3k ohms at 68 degrees is normal.

the thing is the AFM was functioning completely normal before i pulled everything, and i have gotten burned using ohming to diagnose stuff before.I dont see how an AFM can go bad sitting on a shelf for 8 months?I dont have a filter on it now, but that should not make a difference?

I have the DM AFPR kit and a fuel dampener bypass line.I have the fuel pressure at aprox. 35 psi now.Stock fuel pump, for now, havent installed my Walbro yet.

I havent messed with the CPS to time it yet, i cant really get it running long enough to.

This is an 87 7mgte motor and harness in an 88 N/A body.I swapped out the inginter and HAC sensor from the 87.

 

[ilikebigbutts]

anyone?

 

[Fozbo]

First thing I would do is recheck over all the IC piping and every little vacuum nipple. After you are sure that everything is ok there, then look at the timing. Make sure everything is lined up correctly and set your CPS. If the timing is fine, try and get someone local to let you use their AFM sensor to see if it's that. After that, I guess start looking at the fuel system. You might have some bad injectors, or the injector plugs might be swapped around (might check this out first because it's kinda easy to do).

I had a similar thing happen to me when the vacuum line going from the manifold to my 3 bar map sensor (MAFT-Pro) split open at the sensor. It was telling the system that I had atmospheric pressure inside the manifold, so it would dump more fuel. Obviously this doesn't apply, but just try to think of why the system would be fooled into thinking that it needs more fuel.

 

[ilikebigbutts]

I feel like an idiot.

putting the harness together i just clipped the injectors on which ever way i could, telling my buddy i would redo them after i look in the book.Well i forgot.I dont know if i clipped them in wrong but i never checked, so i'll do that tommorow...thanx!

 

[ilikebigbutts]

I feel like an idiot.

putting the harness together i just clipped the injectors on which ever way i could, telling my buddy i would redo them after i look in the book.Well i forgot.I dont know if i clipped them in wrong but i never checked, so i'll do that tommorow...thanx!

injectors clips are on the right way

sunday i'll completely drain the tank put some 93 in it and put ngk plugs and wires in it...i'm hoping that fixes teh problem...I might go and play with the cps now.

 

[suprahero]

Check the coupllings good too if it's still doing it. My wife's car was doing the same thing and somehow one of her blue couplings had a slit in it. It was reading more air than was making it into the intake and therefore dumping way more fuel in it than was needed. Good luck.

 

[ilikebigbutts]

cps was off.i could off sworn i timed it right but i guess i should work on the car after 12 am lol.The car starts up and idles and when i give it gas it doesnt choke when i give it gas.revs freely but still stalls?i got some fine tuning to do but i'll figure it out.best of all my pistns are not swimming in gas now...