Question about 1989 Buick Regal

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1989 buick regal custom 2.8L multi port is running horribly.

1989 buick regal custom 2.8L is having trouble accellerating. it rides rough and loud. Allready tested the heads and compression, all is fine there. tested the plugs and replaced them just for good measure; only one is firing a little wierd, but after replacing the wiring that seems to have gone. when the car accellerates it rocks, and will sometimes stall out and shut down when at a stop. has a minor exhaust problem with the donut gasket, but nothing that cant be fixed with a replacement.

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Car wont start i had the started check put a new battery in what should be my next step?

Posted on Oct 14, 2009

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2.8 ARE HARD TO DIAGNOSE. OK FIRST. MAKE SURE FUEL PRESURE IS GOOD ALL SO DISCONNECT FUEL REGULATOR VACCUM LINE AND MAKE SURE IT IS NOT LEAKING OUT OF THE REGULATOR CLEAN UP ALL GROUNDS. IF THAT GOOD NOW YOU TEST FOR SPARK AT PLUG AND CHECK PULCE IT INJECTOR.IF THIS ENGINE HAS A MECHANICAL PROBLEM YOU ARE WASTING YOUR TIME IT WILL NOT START.OK GOOD LUCK

Posted on Feb 14, 2013

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2001 Buick Regal LS It started running rough with wildly fluctuating RPM's while driving as well as idling. Gradually getting worse until it won't start at all.


How long since a tune-up? Any applicable trouble codes? To check codes, yourself, at the least, you need an obd2 code reader. Some of the national brand autostores will check codes for free, if there are any.

May 26, 2015 | 2001 Buick Regal

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I have a 89 Buick Regal 2.8 and in March i changed the spark plugs and wires because the car was losing power and it worked fine since than. Now the car putts while in park and accellerating and when i get...


Sounds like you are losing a cylinder, due to the described shaking. look for spark on all, then do a compression test. These will tell you a lot!

Jul 29, 2011 | 1989 Buick Regal

1 Answer

Runs rough at start up,then runs okay, Hesitiates momentarily when moving from a stopped position. Occasionally wont start and runs rough, then runs okay. This problem is intermittent


you have a bad injector, if you have A... as it states on the top of the motor 2.8, 3.1 L MULTI PORT and dies or idles really rough and the exhaust smells like strong gas. most likely you have an injector that has shorted or is shorting out and from my experiences usually after a road trip or using fuel injector cleaner or buying a used car. it will cause half the motor to not run or run poorly VERY POORLY or even burn out 1 injector fuse out of 2 under hard acceleration or idles but as soon as you touch the gas pedal dies. but only if it is a MULTI PORT fuel injected motor. ive heard you want to try and replace them with bosch injectors out of a 2.9l ford bronco/ranger. only attempt if you got the mechanical know how sometimes if not done right will leak gas because of the injectors being kinda different length. research before attempting.

Sep 04, 2009 | 1989 Buick Regal

1 Answer

1999 Buick Regal won't restart after a long drive.


NEED TO SEE WHAT CODE IS IN THE PCM WHEN THE LIGHT COMES ON.MAY LEAD YOU IN THE RIGHT DIRECTION

Apr 29, 2009 | 1999 Buick Regal

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Buick 88-90


goback and get the harness that fits the cluster and plug it direct to the fuse block, Its the only way....Good luck pat from P,O

Sep 13, 2008 | 1988 Buick Regal

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