96 Grand Voyager SE 3.0L Stalling

[armnfish]

I have a 96 Grand Voyager SE with a 3.0L engine that will stall after driving it for a while. The symptoms pointed to a fuel filter, which I replaced. I also replaced the plugs, wires, cap, rotor, air filter, and PCV. The problem still exists. Any other ideas?

[armnfish]

OK...after a debate at the auto parts store, they are saying either the IAC valve or the TPS. Now I'm even more confused...

[EVH5150]

There's been quite a few posts about stalling while coming to stops, etc... Mine was one of them, and the problem with mine is the Automatic Idle Speed motor was faulty and would cause the van to stall when the motor winds down to idle. Im not saying that's what's causing yours to stall, but it may be a possibility. good luck.

[armnfish]

Thank you for the reply. The van would start to chug at speed showing all the classic signs of a clogged fuel filter. I'm now reading posts that suggest the fuel pump as well. It sure does seem expensive to treat the symptoms. Short of taking it to a mechanic, there's got to be some way to find the actual problem.

[EVH5150]

Doesn't sound like thi AIS motor. Yeah that's the problem with not being able to pinpoint the problem. replacing stuff that one isnt sure if that's the problem or not. Crap really adds up after a while.
Did you try to hook up a pressure guage to the fuel system? That may give you an indication of a faulty filter or pump. Just a thought...

[armnfish]

Now here's a twist. It was the catalytic converter. I never saw that one coming.

[EVH5150]

Must've been plugged, huh? Never would've guessed it either. Glad the problem's solved.

[bigalbundy]

Originally Posted by armnfish

Now here's a twist. It was the catalytic converter. I never saw that one coming.

I have had the same problem (intermittent) for several years with my 95 Caravan SE 3.0L with 98K miles. The first time it happened on the motorway (interstate) in England while slowing for traffic. It just stalled on me two days ago while pulling into a parking spot after driving for awhile. No shop has been able to pinpoint the cause to date. Others have noted various sensors, fuel system components, etc. I have never heard of the catalytic converter before. I purchased my Caravan new overseas and never removed the converter. Leaded gas was still in use in certain European countries in the mid-90's. The countries I resided in had converted to unleaded gas at the time so I was told it was ok to leave it on. The original converter and exhaust system are still installed. With the O2 sensor located inline just before the converter, it makes sense if the converter is plugged it might confuse the O2 sensor.

[armnfish]

I replaced the downstream O2 sensor because it was in bad shape. I thought I had it all solved when I test drove it. Sure enough, the problem still exists. Evidently, the converter was just a bonus repair. I'm now in the process of replacing the camshaft position sensor, at least that's what the computer is spitting out at me now. Tune in tomorrow for the continuing saga...

[armnfish]

Anybody know if the camshaft position sensor is a separate piece of the distributor or is it integrated with the destributor?

[armnfish]

OK...It's not the camshaft position sensor, which, by the way, has to be purchased by buying a whole distributor. I'm now thinking maybe the crankshaft position sensor. My logic is that I had my tranny replaced about a month ago and the mechanic improperly reinstalling it.

[bigalbundy]

I've had a recent full tune-up (plugs, wires, dist cap, rotor, etc), transmission rebuild, and replaced MAP sensor. This past weekend the stall problem was more persistent than usual. I took it to the local high school parking lot and was able to stall a couple of times. I started tinkering with the EGR Valve position sensor to the right of the throttle body (when view from the front of the engine). I disconnected the top vacuum hose which connects to the top of intake manifold. As soon as I did, the engine perked right up. We've been driving it the past few days with that hose disconnected and it is running fine. Now the question is, is the EGR Valve position sensor? I popped it apart and it has a rubber diaphragm which is cracked. Or is the EGR valve itself. Or is still some other problem that the EGR valve position sensor is responding to? By the way, I have no codes stored when doing the 3-turns of the ignition.

[armnfish]

Last night, my computer popped out a P1391, intermittent CMP or CKP. I think this confirms my crankshaft sensor theory. I'll post my results as soon as I replace it and test drive this beast.

[armnfish]

AT LAST!!! It was the crankshaft position sensor. It's running smooth now! A new problem has cropped up. There is a sensor on the bottom of the tranny near the drive axles that the connector on the sensor side appears to be broken. Anyone have an idea what that sensor is called?

[armnfish]

It's really fixed now. I replaced the speed sensor and reseated the connector for the lock-up solenoid. Time to sell it while it's running!!!