My car seems to miss on 2 cylinders at random.

60

Asked by Aug 24, 2015 at 11:03 PM about the 1993 Oldsmobile Cutlass Ciera 4 Dr SL Sedan

Question type: Maintenance & Repair

Alright, my 93 olds ciera 3.3L seems to miss on a cylinder or bog out whenever there
is a load on the engine a/c, any gear, and power steering, I've slowly been replacing all
issues i can think of I have already replaced all plugs, plug wires, ignition coil, fuel
filter, air filter, fuel pressure regulator, and MAF sensor, it also had a vacuum leak but
has been fixed i checked for more leaks but couldnt find any. anyways what you guys
think?? Again anytime there is load on the engine it sounds like its missing on 1
cylinder or boggingout.....if im going a steady speed about 30 or so itll purr like a kitten
but i accelerate or brake and it begins to bog out again....if i decelerate quickly or stop
abruptly itll really bog out or almost die....if i just let it idle in drive itll maintain speed
and run fine but again gas = bogging. kinda stumped....again....any ideas?

1 Answer

100,245

Have you ran a fuel pressure and flow test yet? It could be starving for fuel under a load. I have seen a few of these act this way when the plug wires start to break down or a spark plug has shorted out internally.

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