My 1990 buick century custom starts but when you hit the brakes or try to put in gear shuts the car off why?

Asked by Jan 12, 2017 at 04:46 PM about the 1990 Buick Century Custom

Question type: Maintenance & Repair

I just changed the spark plugs cause it was runnin
real bad found all 6 had broken porcelain, changed
wires, plugs, coil packs, new alternator. But now i
start it up its still running like crap at idle, revs
good, but stalls when i open the car door, or put my
foot on the brake, or try to put it in gear just shuts
right down with a check engine light and not
flashing any codes.

1 Answer

7,695

how is the fuel pressure? change the fuel filter and see if u get better idle. also rough idle can be from a miss fire. did u change the module under the coil packs?

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