I have a problem in the form of a 2000 Buick LeSabre Custom with the GM 3800 series II engine. After 245k miles, it has begun to show it’s age in some very unaffectionate ways. It has been stalling, sputtering, hesitating, and unwilling to start at seemingly random intervals. And, such is my luck, there has been no ‘check engine’ light on at any point during this saga. Here’s the chronology of events spanning 6 months:
The first symptom I experienced was occasional sputtering, mainly while going uphill. This began to occur shortly after the spark plugs were replaced during regular maintenance. So I replaced the spark plugs again, and also the wires, fuel filter, and fuel pressure regulator. Plus I gave the MAF a good cleaning.
But the problem persisted, and grew to include intermittent stalling when I would come to a stop. Undaunted, I replaced the ignition coils, and swapped in a used ICM.
The car, obviously displeased with my choice words toward it, began to not start every now and then. It would just crank to no avail. So I would try again after an hour or two and it would immediately start as if nothing was wrong. Fearing that I or my wife could be left stranded I replaced the fuel pump. It continues to stall every once in a while and it still sometimes sputters at low rpms. A lot of times it just wont idle at a constant speed.
So then I replaced the crank sensor and I cleaned the camshaft sensor too. Guess what? It’s still intermittently sputtering/hesitating when I accelerate from a stop. And I have noticed that it will also sputter while idling in park as well. It’s like it’s misfiring, but with no engine codes. I’m not happy.
I think I suffer from vehicle loyalty because I probably should have put it out to pasture long ago. But as a second to last resort, I’m asking for help. Help?
Fort Mill, SC