1996 geo prizm chugging out once warm

1996 GEO PRIZM
103,000 MILES
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VALERIESTERN
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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!!!
Aug 15, 2011 at 1:17 AM
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ASEMASTER6371
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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
Aug 15, 2011 at 1:27 AM
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VALERIESTERN
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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!
Aug 15, 2011 at 2:19 AM
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ASEMASTER6371
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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
Aug 15, 2011 at 11:04 AM
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VALERIESTERN
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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??
Aug 15, 2011 at 4:26 PM