97 Plymouth Grand Voyager SE Problem

Hello. I have a 97 Plymouth Grand Voyager SE with 197,000 miles.
Recently the service engine soon light started coming on and the van
started stalling at idle. I took it to a dealer and they couldnt find
anything wrong with it except Map Sensor/ Baro which I already had
replaced. I also had it at a Chevron Service Dept and they also could
not figure out the problem. I can drive down the interstate and the
Service Engine light will go out and the van will run fine then at any
time the light might come back on and start the van stalling. Does
anyone know what else might be causing this problem? The engine is the
3.3 Litre and the van is the SE with the MK III kit.

Thanks in advance.

Jeff

 

Your gonna have to perform the diagnostic test procedure on the map sensor
circuit. If you are loosing the 5volt supply, or ground or the sense wire
has a problem it will turn on the lite. A bad PCM will also cause this
problem.

Glenn Beasley
Chrysler Tech

 

Your gonna have to perform the diagnostic test procedure on the map sensor
circuit. If you are loosing the 5volt supply, or ground or the sense wire
has a problem it will turn on the lite. A bad PCM will also cause this
problem.

Glenn Beasley
Chrysler Tech

 

Sometimes it is not the map sensor itself but the connector to the sensor.
There are 3 wires to the plug and one might defect due to the vibration or
rusted even. Get a second hand one for about 5$ with about 12 inches of wire
and try it. Good luck.
L.G.R.

 

Shooting from the hip I'd say vacuum line leak or throttle body needs
cleaning. But there's lots that can go wrong with an engine with that
kind of mileage. You need to get someone who can give it a complete
diagnosis, and that means stuff like checking fuel pressure, changing the
fuel filters, measuring the inches of manifold vacuum, pulling and reading
all the plugs, checking the O2 sensors for proper operation, etc.

You don't need someone who just pulls codes and replaces what
the computer says to replace. That's what the last 2 places did.

Ted

 

If the fault is A Map Barometric fault it would having nothing to do with
engine vacuum. Strictly electrical. The OP should find out what the exact
fault code is to determine what his problem could be.

Glenn