How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask MikeB85 Your Own Question
MikeB85, ASE Certified Technician
Category: Car
Satisfied Customers: 354
Experience:  ASE Certified, I-Car Trained and Certified, Automotive Technology Degree
Type Your Car Question Here...
MikeB85 is online now
A new question is answered every 9 seconds

1994 Buick LeSabre stalls occasionally while driving ...

Resolved Question:

1994 Buick LeSabre stalls occasionally while driving (about once a week)
Submitted: 9 years ago.
Category: Car
Expert:  MikeB85 replied 9 years ago.

Hi there,

When the vehicle stalls, is it hard to start back up? Does it crank continuously without starting? When does it usually shut off the most?

Customer: replied 9 years ago.
Reply to MikeB85's Post: It starts back up immediately. It has stalled on the freeway, with no hills; at a stop; various times.
Expert:  MikeB85 replied 9 years ago.
Well I would look at the simple stuff first such as spark and fuel pressure. Make sure all of the normal tune up items are taken care of such as plugs, wires, fuel filter, etc. Look at the fuel pressure and make sure that is up to spec. Also make sure the check engine light isn't on and there aren't any trouble codes stored. If everything with the fuel system looks ok then I would look at possibly an intermittent problem with either the camshaft position sensor or the crankshaft position sensor. The Cam sensor should be located on the lower right of the engine, above the crank pulley. The Crank sensor should be located behind the right side of the crank pulley. There could be an issue with the wiring for either sensor as well that is causing the vehicle to intermittently shut off. I would check this things and then go from there. It is hard to directly pin point the problem without doing some testing especially when the problem does not happen all the time. I hope this information helps. Thanks.
Customer: replied 9 years ago.
I've found two answers on line - could you comment on either -- the car does show "service engine soon" as in the second answer below:
Well I now know what the problem was. It was the ECM (computer) that was bad. It took the shop I went to a week to find out what it was and fix it. They got the computer from the junk yard for $85 but the labor was a killer. If I would have know what the problem was I could have got a new computer off the net for $100-150. Oh well lesson learned. Hopefully this message posted will help someone else if they have similar problems. The car is running great now

same thing happened to my 94 LeSabre. It happened from time to time with no "Service Engine Soon" indication. Eventually I got the indication, it was the EGR valve.
Expert:  MikeB85 replied 9 years ago.
Well having a bad PCM would be the worst case scenario. Since the Service Engine Light is on, I would get the vehicle scanned to see what codes come up. It could very well lead you to your problem. If there is an issue with the EGR there might be a code set for it. Since the problem is intermittent is might be an electrical issue with the circuit for the EGR. The first step though is getting the vehicle scanned to see what codes your are working with. You can go to a place such as Auto Zone and they will scan the codes for free. If you find out what codes are stored, get back to me and I can assist you further. Please let me know if you have any questions. Thanks.
MikeB85 and 8 other Car Specialists are ready to help you