1988 Checy C1500 - "popping" in muffler & runs rough

Jul 17, 2007 4 Replies
G

Vehicle:



1988 Chevrolet C1500 2x4 with a 4.3L V6 & standard tranny

The truck was in perfect condition, then was in a fresh water flood where it was completely submerged under water for about an hour.



I have changed all the fluids, filters, etc. , as well as replaced the following with new parts:



- distributor cap



- rotor



- ignition module



- ignition coil



- spark plugs



- spark plug wire set



The 4.3L starts and runs. However, it runs rough, and there are LOUD pops as unburned gas mixture explodes in the muffler/tail pipe area. "I do not see any backfiring coming back out of the carburetor."



I'm pretty sure I have the timing, fuel and spark all working as they should.



I'm wondering if it could be one of the following?



- catalytic converter clogged up?



- emission control stuff plugged up?



Any thoughts as to what I should try next :-) ???



THANKS, Gene


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B

Just SELL it to a local BEANER. They will drive it just like it is. In fact, when they go to pick up Jose/Jorge at 4:30AM they wont have to lean on the horn to wake them up. From what you describe, your truck sounds like a *NEW* car in Mexico!

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G

LOL - never get firing order data from the kid at the auto parts store. After thinking about it, I went back to the shop manual & checked the spark plug wires. Two wires were swapped. It runs like new now:-)

Thanks all, Gene

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M

hahahah that'll teach yah.

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S

I had a Ford Ranger that didn't run right. Four cylinder, two wires reversed. Took me a while to find that problem.

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