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Discussion Starter · #1 · (Edited)
1999 Buick Regal GS Supercharged


About 3 weeks ago, I got a fill up at Thornton's, and left with horrible sputtering. The first thing I figured was that the octane was too low, or there was excess moisture, so I added octane boost and some Seafoam.

When that didn't solve anything, I figured a bad batch of gas must have clogged up the fuel filter, which was pretty old by now anyway. After replacing it, and subsequently the brake like that broke (Irony not intended), the performance seemed quite a bit better after a while. However, it still sputters quite a bit when trying to pass or sometimes maintain 70MPH.

At this point, I figure it's either the injectors or the fuel pump. Now I get a check engine light with hard gas. "Multiple random misfires".

To me, I figure, a bad injector would see "Multiple misfires in Cylinder X", so the random nature of the issue points to a bad fuel pump. In either case, I did a fill up with STP cleaner additives, and this current fill has more techron.


Is this the same conclusion you would come to?


I'm going to be checking my injectors and spark plugs this weekend.
 
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