Question about 1997 Buick LeSabre

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Buick 97 LeSabre hard start and acceleration issues

For the last 3 months I have been having issues with my 97 LeSabre starting, where it has required 3-5 attempts before finally starting and occasionally failing to fully turn over when "successful". It also requires me to go harder on the accelerations in the past week than it has in the past and an engine code for fuel pressure has come on within the last week as well. Recent Replacements/Maintenance: 2 months ago oil change with engine cleaning supplement, 2 months ago fuel injector cleaner, 2 months ago fuel filter replacement, 2 months ago spark plug replacement, and 2 weeks ago crank shaft position sensor replacement.

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  • 26 Answers

Have you checked the catalytic converter? After 20 years they do pug up causing some of the problems you describe

Posted on Nov 20, 2017

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Posted on Jan 02, 2017

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SOURCE: buick lesabre nightmare

Need to get a scan tool and look at the data stream while it is running for alot more info.Also any trouble codes.Sounds like initially,the engine isn't getting any fuel.I would have a pressure gauge connected to the fuel rail on the engine,so i could monitor the fuel pressure while all this is going on.Items to look at on the data stream would be timing,what timing is the PCM commanding for the engine.Also,have you checked for continuos power feed to the coils during this no start condition,and fire at the plugs while cranking.You could possibly still have spark,but maybe it is extremely weak?I have seen bad ignition switches cause weird problems before too.Many things power up through the ignition switch,just a thought.Have also seen bad PCM's cause strange problems..38 volts is a little on the low side for GM.Usually see those at,at least .50 and up,and rise steadily while pressing the throttle,up to just under 5.0 volts.Potentiometer with 5 volt supply.Vacuum leak can be checked with engine running at a steady idle speed,spray brake cleaner all around the intake manifold and listen for engine speed change.

Posted on Jul 31, 2008

  • 255 Answers

SOURCE: buick lesabre no start

Hi you have replaced allmost everything ,(try fuel pump relay)

Posted on Aug 18, 2008

  • 67 Answers

SOURCE: HOW TO CLEAN '94 BUICK CENTURY 3.1 EGR VALVE ..I

to properly clean and test the egr valve you should remove it from the car. disconnect vacuum, elect connectors, and check the gasket surface both on the manifold and on the base of the valve. you will need to buy or cut a new gasket most likely. when you apply vacuum to the control inlet, you should see the valve lift away from the seat. I use brake cleaner and compressed air to spray clean and blow out the valve just to test it and then go from there depending on what you find ---- one of the vacuum switches that controls it or a faulty vacuum line is a likely possibility also ---- so you should check them also. a vacuum pistol comes on really helpful here.

Posted on Jun 20, 2009

  • 196 Answers

SOURCE: Buick LeSabre makes funny sound!!!

It is a sign of a clogged convertor, but i happen to own the same car (with a series 2 3800) and had the same symtpoms going on when i bought if for the wife. Mine turned out to be a Exhaust Gas Recirculation Valve (EGR Valve).

To kind of get a feel for what is going on with the convertor, you can have someone help you but sitting in the drivers seat, with the car running. You go behind the car near the tail pipe. Now have the other person rev it up a little, not to much though. Put your hand but the tail pipe to see what kind of pressure the exhaust has. You can use another vehical to do the same thing to feel what things are supposed to feel like. If the convertor is plugged, the pressure of exhaust coming out will be a lot softer than it should be.

If after checking it as discribed above, if you feel it is plugged, grab a hammer, and bang the heck out of it. This will break up and loosen the clogged part without have to replace it.

There is no really good way to test a EGR vavle without a special computer. Replacing it however, does seem to me as the most likely repair for this vehical. It is located on the top of the drivers side of the motor. It look like a cylinder with a wire coming out of the cap, and is held on by 2 13mm nuts.

Good Luck....

Posted on Mar 24, 2010

  • 105 Answers

SOURCE: 2000 Buick LeSabre Will not start Replaced cam

Multiple engine misfire is related to the coils and the ignition control module. I have a 2002 with the 3.8 engine. It has three coils. I just went through this problem. I bought one coil and tried it in each position with no improvement. It was the ignition control module. Mine is located under the three coils. A relatively easy item to replace. Cost about $140.

Posted on Apr 19, 2010

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1 Answer

Buick engine swap,94 3800 motor into 97 lesabre ,is it compatable?


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I have a 97 buick lesabre. Yesterday i started the car and it ran just fine, drove it all around town. Now this morning, tried to start it up and it turns over but no fire. Some people me its bad gas when...


Bad Fuel ---your not that gullable

The only way to find out, is to have
experienced people check it out

A repair shop---You have one you have been going to
for decades--right?

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1 Answer

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unfortunately it sounds like you just started to replace parts and honestly you could have already repaired the issue

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Sounds like a starter problem.If a 'click' sound is heard when it won't turn over,it is probably the starter.

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My car was having the problem I had my ingnition switch change, stater and a new battery and now it's fine.

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