Stalls, shakes, and no starts...
I'm at a loss here as to what to do with my Jeep. I feel like she's literally trying to kill me at this point (LOL okay, maybe not that extreme... but some days she really pushes my buttons).
2002 Jeep Grand Cherokee Laredo
4.0 straight V6 (as I'm told)
Where do I start? It started 6 months ago (or so) with some shaking / bucking around 15 minutes after I started her up each morning. It would happen once or twice, then stop. That progressed in to stalling on occasion, but the same ~15 minutes after driving. Once stalled, it would normally start back up within a couple of tries (under 30 seconds). Additionally, I would have a really hard time starting it up after sitting for a while... so if I ran in to the grocery store and came out 20 minutes later, it could take 10-15 minutes to get it started back up.
In February, while trying to bring my newborn son home from the hospital, the Jeep decided it would die and not start right in front of the main entrance, once I loaded him inside. Very embarrassing. After about 45 minutes, it finally started up.
At that point, I replaced the spark plugs, throttle position sensor, camshaft position sensor, air charge temperature sensor... not right away... took me a couple weeks to get to it.
Seemed to run great for about a week... then started acting up again with the stalling. It always seems to run fine if I let her sit for several days at a time. If I take her out too much within a few days, the symptoms get worse quickly.
The other night while trying to get home she stalled while driving and wouldn't start up for 45 minutes or so. I haven't moved her since or tried to start again. I don't even know where to begin at this point.
I should also mention that the newest symptom I'm having (as if I didn't have enough already) is that most times, after parking the Jeep, when I go to start up again, turning the key does nothing. I have to put the thing in neutral, give it a bit of a shake, and then try the key again. This usually resolves that problem, and the starter works (whether I can get it started is another story).
One last thing... it never registers any codes when stalling on me. I wish it did so I would have something to go on. But the engine codes are clean.
So... if you're still reading at this point... thank you. Any thoughts? Take a shotgun to it???
It was suggested that maybe the ECM is going bad... I'm considering buying a new one, because I have no clue what else to try right now...
Last edited by cfsamet; 04-30-2013 at 04:23 PM..