95 Voyager Hesitating & Stalling

[JeffG]

95 Voyager recently had valve job, complete tuneup, EGR replaced, fuel filter replaced. Ran perfect for awhile and then developed an annoying intermittent stall, especially noticable at higher speed when cruise control is trying to maintain a steady speed on a downward incline or straight-away. Will act up for about 10-15 minutes and then run fine for awhile. Engine will also occasionally quit when slowing down for a sign or making a turn. Re-starts OK. Idles fine. Mechanic is scratching his head as all diagnostic tests show nothing wrong. Appreciate any help. Thanks.

[yogi_123rd]

If you mean intermittant misfiring at highway speed (rather than the engine quitting outright) or at idle, with no computer code otherwise set, then the usual causes listed in the most likely order: clogged throttle body, distributor cap/rotor need replacement, or one-two bad plug wires.

A clogged throttle body is most likely. Oily soot builds up in it from the PCV. Spray carberator cleaner inside the bore past the butterfly throttle valve and into any smaller holes (your idle air bypass) to clean them out.

You should also check if the distributor cap/rotor was replaced in the tuneup you got. Some tuneups today just replace spark plugs. Distributor caps build up resistance and are good for no more than a year.A bad plug wire will be harder to track down. If a wire is pulled to removed it from the plug, it can seperate the metal clip from the end from the wire. That will cause intermittant miss fires at idle and steadier misfires at highway speeds.

If you wish to get know how to obtain the computer codes yourself, then the procedure is...

Chysler computer codes (80-95 Chysler's):

Chysler faults codes are stored in the computer for up to 50 ignition starts. Each code is two digits. Beware that some problems can generate multiple faults codes. The code's meaning (i.e. faulty sensor) can be found by doing a web search using keywords "Chryler computer codes".

To obtain codes: Turn the ignition key on-off-on three times (don't start the engine) will put the
computer into diagnostic mode. Watch the "check engine" light. Count the flashes for each digit which will be followed by a pause between digits. Two digits to a code. The end of the list is code 55.

To reset the codes, turn the ignition key on-off-on
50-55 times (don't start the engine).

[yogi_123rd]

If you mean intermittant misfiring at highway speed (rather than the engine quitting outright) or at idle, with no computer code otherwise set, then the usual causes listed in the most likely order: clogged throttle body, distributor cap/rotor need replacement, or one-two bad plug wires.

A clogged throttle body is most likely. Oily soot builds up in it from the PCV. Spray carberator cleaner inside the bore past the butterfly throttle valve and into any smaller holes (your idle air bypass) to clean them out.

You should also check if the distributor cap/rotor was replaced in the tuneup you got. Some tuneups today just replace spark plugs. Distributor caps build up resistance and are good for no more than a year.A bad plug wire will be harder to track down. If a wire is pulled to removed it from the plug, it can seperate the metal clip from the end from the wire. That will cause intermittant miss fires at idle and steadier misfires at highway speeds.

If there is infact a computer code set, then you should concentrate of that problem first.

If you wish to get know how to obtain the computer codes yourself, then the procedure is...

Chysler computer codes (80-95 Chysler's):

Chysler faults codes are stored in the computer for up to 50 ignition starts. Each code is two digits. Beware that some problems can generate multiple faults codes. The code's meaning (i.e. faulty sensor) can be found by doing a web search using keywords "Chryler computer codes".

To obtain codes: Turn the ignition key on-off-on three times (don't start the engine) will put the
computer into diagnostic mode. Watch the "check engine" light. Count the flashes for each digit which will be followed by a pause between digits. Two digits to a code. The end of the list is code 55.

To reset the codes, turn the ignition key on-off-on
50-55 times (don't start the engine).