Shuts off while driving

Tiny
JOHN D LOWRY
  • MEMBER
  • 1993 PLYMOUTH ACCLAIM
  • 2.5L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 83,000 MILES
Driving down highway car starts stalling and quit running. Called for tow truck no show. Tried to start again after one and a half hours! Started again drove it home, will only start and run for a little while then quits. Changed fuel filter, tried fuel pump relay (no help), cleaned plugs today waiting for battery to charge back up. Any ideas?
Monday, August 9th, 2021 AT 4:10 PM

3 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,752 POSTS
Real common problem with a real easy solution. Crankshaft position sensors and camshaft position sensors often fail on any brand of car by becoming heat-sensitive, then they work again after cooling down for about an hour. On this engine and its 2.2L counterpart, the ignition pick-up assembly is the sensor in question. It sits under the rotor in the distributor. This photo shows what it looks like.

This job can be done by a competent do-it-yourselfer in about five minutes with just a #2 Philips screwdriver. The hardest part of the job is removing the two screws. The heads get rusty, and the screws become tight in the distributor housing. Use a good-quality screwdriver that fits snugly into the screw head.

There's a tall black plastic shield not shown in these drawings. A lot of people threw them away, but they have an important purpose. That is to keep water off the distributor cap and spark plug wires when you're driving in rain. Once the two screws are removed, the distributor cap is just lifted up and to the side, then the sensor can be lifted up and off.

This failure was common enough that many people carried spare sensors in the glove box. It can be replaced on the side of the road if you have to. I wouldn't worry about the last step, "setting the timing". Any slight change due to the new part is going to be very insignificant.
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Monday, August 9th, 2021 AT 5:14 PM
Tiny
JOHN D LOWRY
  • MEMBER
  • 8 POSTS
After all checking came to fuel pump looked corroded at plug in. A couple times could hear fuel pump start up eventually no sound from pump. That was the culprit it went out on the highway after setting. It worked again and finally went out completely ! Who knew? Electrical problems really not good!
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Friday, August 27th, 2021 AT 10:09 AM
Tiny
CARADIODOC
  • MECHANIC
  • 33,752 POSTS
I only ran into a fuel pump connector problem once. That was a few weeks after the pump was replaced. Apparently the terminals were spread and were making a weak connection. That resulted in them overheating and burning up the connector.

Very happy to hear you solved this. Please come back to see us again.
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Friday, August 27th, 2021 AT 1:21 PM

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