'97 ZJ Stalling
I have an automatic '97 ZJ that has had the problem everyone else seems to be having with the stalling issue. Every time it did stall out, it would start right back up without waiting more than a few seconds. Assuming that it was related to the PCM, my wife and I tried the backing out of the screws trick as well as just unplugging the PCM and making sure the connections were back in tight. These few things helped for a few months.
However, lately, the stalling issue has been getting progressively worse to the point that one minute it will be running just fine, and the next it just shuts off and won't get started back up for 10 minutes, if not longer, completely at random. Most of the time, it starts stalling out when the gas isn't being pushed. My wife has found out that if she throws the car in neutral, keeps her foot on the gas so it has around 2,000 RPM and easing into a stop that way, the car doesn't stall. Every time we got in the car, we didn't know if it'd drive fine or if it would stall out 2 miles down the road.
But all that changed yesterday as the car won't stay on longer than a few minutes before shutting off. Sometimes right away, sometimes grumbling a bit before it happens. I had to tow it home today after it wouldn't start along a highway. It was sitting overnight because she couldn't get it started after work yesterday. This is the second time we've had issues even getting the car started.
Other things it has been doing around the time it stalls out includes (all according to my wife):
- The noise that accompanies it sounds kind of like a diesel/semi truck where the pitch gets remarkably lower than a normal gasoline car before puttering out. She calls it a grumbling.
- The idling goes like it wants to stall, but then fluctuates like it might continue on as normal. Even if you stop the car, it still fluctuates like it's trying to stall, but still wants to stay on. It will do this for several minutes if the car isn't shut off. Even pushing the gas doesn't help try to start it 90% of the time.
- Sometimes while driving (no braking or anything), the car will act like it is about to stall, but taking your foot off the gas will help it continue on as normal, no problems.
We have changed the spark plugs, TSP, and fuel pump recently. The filter was fine when I did the fuel pump. My wife also says the exhaust noise sounds louder or different right after she starts it back up after it stalls.
Anyone had this happen before? Or have any ideas of what it could be?