Random stall, low idle, no codes
Thanks for looking...
04 JGC 4.7 no mods
Yesterday, sitting at a light, heat on, nothing else, car slowly dropped in idle and stalled. No CEL, no codes, notta. Started right back up. I pulled over, sat for a while and it acted fine. Drove for 5 minutes, parked, sat there for about 5 minutes and the idle dropped to under 500 and then it caught itself and went up to 650. I think if I were in gear, it wouldve stalled. Happened one more time driving home, but I tapped the gas before it stalled because I was sitting at a light with traffic behind me and I didnt want to be "that guy".
TPS has checked out fine, has new plugs for a while now, new air filter, new fuel filter, battery is good, alt is good, IAT checked out ok with resistance check, a quick IAC check came out ok, removed, idle went up, back on, reverse, steering and AC and it barely changed in RPMS, checked for vac leaks by spraying cleaner. O2 sensors all appear to be operating properly. There is only one thing that I noticed that was slightly weird to me. When my jeep is idle the TPS shows it's at 11% which is normal (WOT it shows almost 80%, also normal), but when this issue happened (not the actual stall, wasnt monitoring then) my TPS reported 7.8%, voltage dropped as well as RPMs.
Would a drop in RPMs change the throttle position at idle? I wouldn't think so? I would think the problem is the TPS or IAC But, what do I know?