Question about 1991 Buick Park Avenue

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1991 Buick Park Avenue sputters at random, stalls-egr problem?

I have a 1991 Buick Park Avenue that sputters at random and runs very rough for a period of time and then rights itself. A couple of times it has stalled out and was hard to restart. We have changed the ignition module, new plugs & wires, changed the fuel filter, and put in a new catalytic converter. Is this a problem with the egr sensor, which I have been told by Car X does not exist on a Park Avenue.

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I would look at the Map Sensor or the O2 Sensor then the EGR Valve. As far as I know all vehicles have EGR valves. Get the Haynes Manual on your vehicle for location and replacement steps for all of these. It could also be a Throttle Position sensor or clogged or malfunctioning injector units, the Haynes manual will assist you in isolating these.

Posted on Jul 20, 2010

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Remove all three cables from battery and clean the connectors. Replace bolts.. I have seen this problem many times due to dirty connections at the battery.

Posted on Aug 16, 2010

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Posted on Jan 02, 2017

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SOURCE: 1992 buick park ave

have you replaced your ignition module?

Posted on Oct 04, 2008

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SOURCE: 1987 Buick Lesabre T stalling and running rough

I just had the same problem. Replaced the fuel filter,still crappy idle and no acceleration. I replaced the fump pump along with the wiring harness and the fuel pump screen and my cars purrs like a kitten,has back to normal acceleration and idles better than before. Hope this is some sort of help to you. I did it myself. Total cost, a little over $120. Good luck. By the way, your fuel pump should be pushing out about 65 lbs of pressure. is it ???

Posted on Apr 21, 2009

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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

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94 Buick Park Avenue that stutters under a light load I have a 94 Buick Park Avenuethat ... Buick Century 97 runs rough and stutters when cold and gas applie Engine runs rough ... I have a 1994 buick lesabre it starts ok but stutters and stalls.

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My 1989 Buick Park Avenue is sputtering and stalling.


This is a condition that could be caused by many things. First check all air hoses for a vacuum leak. Always start with the cheapest solution before looking at most expensive problems.Try while running unplugging and replugging a vaccuum hose connected to a component 1 at a time and check to see if it changes the condition and let me know what you find. Most common is clogged EGR

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I have a 1994 Park Avenue that was owned by an elderly woman. Vehicle has ~99000 miles on it. Overall problem is random sputtering, loss of engine power at idle or between stop & go traffic. I have...


if u r not getting a check engine light then change fuel filter, add dry gas to gas , from sitting... gas went bad, sometimes u will have to drain off fuel rail and lines to clear bad gas from system. temp sensor for fan is bad.

Mar 29, 2011 | 1994 Buick Park Avenue

1 Answer

I have a 1991 Buick Park Avenue. Runs rough in


Here are the common cause of surges, cold stalls, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours.
To correct this problem I want you to get a can of intake cleaner (ABOUT $5.00) from any local auto parts store like NAPA or Carquest, do not use carburetor spray, intake cleaner only or u will damage the Teflon coating inside the throttle valve and air bypass valve, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

May 25, 2010 | 1991 Buick Park Avenue

2 Answers

Where on engine is egr valve? 91 buick pa 3.8lt


It's a bellows shaped diaphram with a vacuum hose fittedto it . Usually rear of manifold (intake)

Apr 05, 2010 | 1991 Buick Park Avenue

1 Answer

1991 buick park avenue will not stay running and runs rough


I think you got your answer to the alarm issue. I had the same problem with rough idling, lack of power, and the chugging that occured when going up hill. I have a 1991 Park Avenue with 190k miles. Fixing the catalytic converter helped, but the real problem was in the ignition control module. It seems that older buicks will heat these units to the point that the glue inside melts and eventually exposes the electronics. Look for glue or exposed wires below the ignition coil. It's a $100 part that you should be able to change yourself. I hope that helps.

Jan 23, 2009 | 1991 Buick Park Avenue

2 Answers

Engine runs very sluggish at start up


Change fuel filterS...plural
Don't forget the big canister unit under (next to wheel well)

Dec 17, 2008 | 1995 Buick Park Avenue

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