burren2004
New member
"I have installed a replacemen
"I have installed a replacement 4.3 V6 with a new vortec marine engine, the problem is, when I get to 3000 revs (2000 under load ) it backfires and looses power, I have checked and replaced all tunderbolt ignition components but no change, I notice now that if I pull the plug wires from the left hand side of the engine, it makes no (or very little) difference, whereas if I pull a wire from the right it cuts out.
can anyone tell me what the problem might be"
"I have installed a replacement 4.3 V6 with a new vortec marine engine, the problem is, when I get to 3000 revs (2000 under load ) it backfires and looses power, I have checked and replaced all tunderbolt ignition components but no change, I notice now that if I pull the plug wires from the left hand side of the engine, it makes no (or very little) difference, whereas if I pull a wire from the right it cuts out.
can anyone tell me what the problem might be"