Question about 1998 Plymouth Grand Voyager

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My plymouth voyager 1998 stalls when slow but starts again

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Start the van and let idle.

With hood up, find the MAS (mass airflow sensor)

Using a screwdriver handle (or other small tool, with mild weight), tap the MAS.

(This is found midway between the airfilter and the intake manifold on the air intake hose).

If the van stalls while idling, (tapping on MAS) or dies, the MAS may need replaced. First, purchase some MAS Cleaner at a local auto parts dealer.

Remove the MAS completely and spray the sensor cleaner inside the sensor generously. This is specifically formulated for this sensor and will not harm the sensor itself.

Once you have sprayed the MAS (from both sides), let air dry for about 20 minutes.

Install the MAS and perform the test again (tapping). If the van stalls or dies still, then the MAS needs replaced.

NOTE: the van will not start if the wiring harness for the MAS is not plugged in, so be sure to plug this back in after reassembly. (should be on left side).

If it does not (at either first or second test) stall or die (idle does not change at all) - check the following:

1. Air Filter - you'd be surprised how much an air filter (or lack thereof) will have on engine performance.

2. Pull the cap of the distributor and examine the inside of the cap as well as the rotor. The rotor may need replaced if it is cracked, or if the metal tip (curved) is worn (i.e. white, rough texture).

3. Examining the cap, look at the metal stubs (mistakingly called points) on the inside and notice if they are grooved, white and/or worn. If so (and most likely are) replace both the cap and rotor. These are fairly cheap for this van. Price differnet auto part stores for best purchase price.

4. As a safe measure, replace both O2 (oxygen) sensors. These are bit more spendy, however they too effect the perfomance and gas mileage. There are two on this van. The first, sits directly behind the engine on teh exhaust manifold. Easily excessible and fairly simple to remove. The second is located on the passenger side directly under the passenger seat after the catalytic converter.

A special socket is used to remove these, however if you cannot afford to buy this, simply use and open end wrench, but unplugh the wiring harness first or it will twist up.

Installation is the same - thread in by hand, then tighten, then plug in the harness. NOTE: the second one will seem a bit more difficult as the wiring harness is protected by a rubber "skirt" that is pushed into the bottom of the van - simply pry this out with a flat head screwdriver, making sure not to rip it as it is a soft rubber. Pull it out and the harness will pull with it. Unplug and replace unit.

NOTE: if your engine light is on, in most cases it is due to either the O2 sensor(s) - or the EGR valve - this is located on the driver side about level with the intake with two-three vacuum lines coming out of it.

Here's a "free" tip: If your tranny starts to slip. Stop driving it IMMEDIATELY. Replace the inner seal (behind torque converter) and the torque converter (as a safe measure).

I had this happen and failed to do so (lack of knowledge) and ended up scrapping my van. It only had 112,xxx miles on it, and the tranny was the ONLY thing wrong with it.

If you have any questions, comments or concerns please let me know.


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Posted on May 15, 2010

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