TK99XJ
NAXJA Forum User
- Location
- Los Angeles, CA
1999 4.0 AW4 82K...
Cold start idle is normal, after about 5 minutes it starts it's gradual climb to 1500 or 2000 and then falls off, sometimes stumbling and actual stalling in gear, I actually have to flop her in to neutral to keep her running at lights.
TPS and IAC have checked out and the voltages are within spec, I have checked all of the vacume lines and there appear to be no leaks (45 minutes looking at the lines inch by inch). I have disconnected the battery for 12 hours to reset the PCM and it has not helped and before doing so, I ran an OBDII scanner on it for codes and found none. The throttle body has been removed, IAC and throttle body were cleaned throughly with Intake cleaner.
At this point, I am not sure where to go next. she runs fine at speed so I do not think fuel pressure is an issue.
Any suggestions would be great!
Cold start idle is normal, after about 5 minutes it starts it's gradual climb to 1500 or 2000 and then falls off, sometimes stumbling and actual stalling in gear, I actually have to flop her in to neutral to keep her running at lights.
TPS and IAC have checked out and the voltages are within spec, I have checked all of the vacume lines and there appear to be no leaks (45 minutes looking at the lines inch by inch). I have disconnected the battery for 12 hours to reset the PCM and it has not helped and before doing so, I ran an OBDII scanner on it for codes and found none. The throttle body has been removed, IAC and throttle body were cleaned throughly with Intake cleaner.
At this point, I am not sure where to go next. she runs fine at speed so I do not think fuel pressure is an issue.
Any suggestions would be great!