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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Re: 1989 buick regal custom 2.8L multi port is running...
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
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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.
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.