Question about 1990 Buick Regal
1990 buick regal 3.2, runs great when first started once choke (high idle) kicks off it starts running rough. the ECM has been replaced new coil pack plugs wires fuel filter(all by previous owner, he gave up on the project and i bought it cheap) i replaced the fuel system temp sender and dumped some seafoam and fresh gas into the tank, it immediately ran alot better so i started driving it around the block and it ran great, just a little rough in gear at a stop(i figured old fuel was the cause) after about 9 miles it started running really rough again even while drivng at 40 mph, died a couple times and restarted itself while doing 30-40 mph, finally at about 10 miles of travel it died completely, restarted went about 50 feet and died again, did this a few times then i towed it home. started it up this morning and it ran perfect at high idle, as soon as high idle kicked off it began to run rough, i was pondering cleaning out the egr, and testing the MAF sensor and ignition modual, however im trying not to just throw parts at it to find a cure.
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Posted on Jan 02, 2017
you might want to chk. the crank sensor and or cam sensor. sounds more to me that it could be fuel problem. chk. fuel pressure. pump could be on its way out. don't be fooled by hearing the pump running as they sound like they are pumping but there not, at least not enought pressure to keep it running. pressure should be around 50 p.s.i.
Posted on Jan 06, 2009
Best to do a fuel pressure test, pump might be weak and dosent show up until it gets gets warm. Best to do the test after it quits again when pump is at its hottest. If you havent done it yet chg. fuel filter too.
Posted on Mar 26, 2009
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