Neuner
NAXJA Forum User
- Location
- Republic of Texas
4.0 OBDII out of a '98 ZJ with a '98 XJ PCM in a CJ7 so didn't know where to post...
Swapped in 5 years ago and has been running great. Twice recently it has shut down on me on the highway on my return from work but only when it was about 80+ degrees out.
With cooler morning commute and lunch errands it runs great, lots of power.
Cruising along about 70mph and 80+ degrees out, it will all of a sudden just quit. Immediately afterwards, if I get it started;
- engine temperature normal
- idles low and rough, barely running
- no change in rpms if I increase the throttle / open butterfly
- has a deafening air rushing noise at the IAC port
- has no OBDII codes thrown
- feathering the clutch in gear will kill it so no power
After it cools down a little after about 10 minutes, it runs good and strong all the way home with no issues.
I replaced the MAP, TPS and IAC and it still left me stranded on the highway IN THE EXACT SAME SPOT from work the 2nd time.
Scanned PCM and no Codes either time. I cannot figure out what would cause this except maybe a PCM going bad?
This second time I grabbed a video while dodging traffic. Doesn't do it justice as the air rushing sound from the IAC is almost deafening. It's louder than the engine and highway noise.
https://www.youtube.com/watch?v=du5be8qtjgA
Swapped in 5 years ago and has been running great. Twice recently it has shut down on me on the highway on my return from work but only when it was about 80+ degrees out.
With cooler morning commute and lunch errands it runs great, lots of power.
Cruising along about 70mph and 80+ degrees out, it will all of a sudden just quit. Immediately afterwards, if I get it started;
- engine temperature normal
- idles low and rough, barely running
- no change in rpms if I increase the throttle / open butterfly
- has a deafening air rushing noise at the IAC port
- has no OBDII codes thrown
- feathering the clutch in gear will kill it so no power
After it cools down a little after about 10 minutes, it runs good and strong all the way home with no issues.
I replaced the MAP, TPS and IAC and it still left me stranded on the highway IN THE EXACT SAME SPOT from work the 2nd time.
Scanned PCM and no Codes either time. I cannot figure out what would cause this except maybe a PCM going bad?
This second time I grabbed a video while dodging traffic. Doesn't do it justice as the air rushing sound from the IAC is almost deafening. It's louder than the engine and highway noise.
https://www.youtube.com/watch?v=du5be8qtjgA