1991cadillac deville starts to shudder when it hits 43 mph

Asked by May 26, 2016 at 12:06 PM about the 1991 Cadillac DeVille Sedan FWD

Question type: Maintenance & Repair

my 91 cad Seville  shudders at exactly 43 mph. I've
replaced the fuel pump and filter the egr the tps
the fuel pressure reg  the cat converter. .It loses
power also. what is wrong with this stupid car.

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