• Tiny
  • Nancy Hunt
  • 1996 Geo Prizm

Engine Performance problem
1996 Geo Prizm 4 cyl Front Wheel Drive Automatic 321442 miles

My 1996 Prism has no check engine lite showing-I drive it for alittle while-it hesitates increasing to actually " bucking" and has actually stalled. When it seems to have a loss of power-I can pump the gas pedal a few times and make it continue running or it can stall also. We have cleaned the EGR valve/ERG vacuum modulator-it was clogged with thick black carbon gunk-but the car still does the same thing. We've also replaced the spark plugs/ignition wires, diistrib. Cap, oxygen sensor. My car has original engine/transmission and has 321,442 miles-Can I fix it to keep it running? It is a FANTASTIC Car-my best buy ever! Thanks for any help/suggestions! Nancy

Monday, August 4th, 2008 AT 8:58 PM

1 Answer

  • Tiny
  • mmprince4000
  • Expert
  • 8,715 posts

Have the fuel pressure checked with a mechanical gauge. While it could be excessive EGR flow the PCM should set a code.
I think it is fuel related (pressure) as opposed to EGR.

Was this
Tuesday, August 5th, 2008 AT 6:00 AM

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