Vehicle:
1988 Chevrolet C1500 2x4 with a 4.3L V6 & standard trannyThe 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