strikeeagle
New Member
- Joined
- Jun 6, 2001
- Messages
- 3,326
OK, I need help!
I put almost $2K's worth of parts into my buddy's (my old) 87 GN this summer and the thing will not cold start without giving it (some) gas (no fast idle at all), can't be moved before it's fully warmed up, doesn't warm idle especially well and stalls when you get out of the thing after a part throttle excursion.
The IAC readings seem to be all over the place - from 0 to 175. If you increase minimum air the idle drives to 0. If you back off it remains at 0. Now and then it jumps to 175. IAC *never* seems to make sense.
The car has a newly ported Steve Monroe TB, a new IAC, a new vacuum manifold, a new Angle Boss, new gaskets, new vacuum hoses, a new PCV and Tomka check valve, etc. In short, things have been gone through. I did disconnect the EGR and vapor canister this summer, and capped the associated vacuum lines. I even changed out the PROM, then the entire ECM - no difference.
What am I looking for, guys? Vacuum leaks? Spurious magnetic fields? I'm really stumped?
Thanks for any help.
strike
I put almost $2K's worth of parts into my buddy's (my old) 87 GN this summer and the thing will not cold start without giving it (some) gas (no fast idle at all), can't be moved before it's fully warmed up, doesn't warm idle especially well and stalls when you get out of the thing after a part throttle excursion.
The IAC readings seem to be all over the place - from 0 to 175. If you increase minimum air the idle drives to 0. If you back off it remains at 0. Now and then it jumps to 175. IAC *never* seems to make sense.
The car has a newly ported Steve Monroe TB, a new IAC, a new vacuum manifold, a new Angle Boss, new gaskets, new vacuum hoses, a new PCV and Tomka check valve, etc. In short, things have been gone through. I did disconnect the EGR and vapor canister this summer, and capped the associated vacuum lines. I even changed out the PROM, then the entire ECM - no difference.
What am I looking for, guys? Vacuum leaks? Spurious magnetic fields? I'm really stumped?
Thanks for any help.
strike