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02-03-2010, 06:48 PM | #1 | |
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94 jimmy 4x4 4.3 vortec running rough/backfire
I have a 94 jimmy 4.3. it is running rough and occassionally backfire/popping from what sounds lie under the hood. Ivecahnged plugs, wires, egr, oil and filters. tommorrow im changing cap and rotor. Any more ideas??
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02-03-2010, 07:11 PM | #2 | |
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Re: 94 jimmy 4x4 4.3 vortec running rough/backfire
Have your catalytic converters check, a plugged cat will cause the same symptoms.
It's a cheap test, that canbe done @ any local muffler shop. |
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02-03-2010, 07:36 PM | #3 | |
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Re: 94 jimmy 4x4 4.3 vortec running rough/backfire
I thiink ill just take the cat off since i live in a no e check county. Ill just weld a straight pipe on.
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02-03-2010, 10:25 PM | #4 | |
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Re: 94 jimmy 4x4 4.3 vortec running rough/backfire
Try doing a fuel pressure test and post back with the results
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02-04-2010, 03:17 PM | #5 | |
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Re: 94 jimmy 4x4 4.3 vortec running rough/backfire
I changed rotor, cap, feul press. reg. and plenum gasket and truck is running great.
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02-05-2010, 09:45 PM | #6 | |
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Re: 94 jimmy 4x4 4.3 vortec running rough/backfire
what was it doing? I know it says runing rough, was the inside of your plenium filled with gas? What was the symptoms you had?
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