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1996 Geo Prizm chugging out once warm

Tiny
VALERIESTERN
  • MEMBER
  • 1996 GEO PRIZM
  • 103,000 MILES
My geo prizm has been working like a charm until 2 wks ago. I was driving from 45 miles and all of a sudden it started acting like it was out of gas, chugging out. Well I replaced the spark plugs, fuel pump and fuel injection sensor thinking it was the fuel line somewhere. I have also check the cad. Converter and it is fine. It runs good until its warmed up and then it begins to chug out like it wants to die or like it is out of gas. PLEASE HELP!
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Monday, August 15th, 2011 AT 1:17 AM

4 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
What is the fuel injection sensor? How did you check the converter? This is what it sounds like the fault. Did you do a back pressure test or a snap throttle test?

Roy
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Monday, August 15th, 2011 AT 1:27 AM
Tiny
VALERIESTERN
  • MEMBER
  • 3 POSTS
Sorry it was the fuel pressure regulator :) as far as the cad. Converter it was pulled off and looked at to insure it was clear and free of obstructions. And fuel pressure test not yet, but working on trying to find someone with a fuel pressure gage. And how do you check the snap throttle? This is all new to me. Thank you for your quick reply!
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Monday, August 15th, 2011 AT 2:19 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Looking at the converter is not a test. You need to do back pressure test and the snap throttle test. You use a vacuum gauge and watch the readings from snapping the throttle.

Roy
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Monday, August 15th, 2011 AT 11:04 AM
Tiny
VALERIESTERN
  • MEMBER
  • 3 POSTS
Thank you, I will see what I can do, thank you for your qucik reply. SO you think it is highly probable to be the converter?
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Monday, August 15th, 2011 AT 4:26 PM

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