Reply to "UPDATED - Backfire under Low RPM / Load (4th or 5th Gear)....."

ausfordMember

Get a ohmmeter and check the resistance of your ignition wires. Also take a look at your distributor cap and rotor button. If either is suspect in any way replace them.

There is something causing those 4 rear cylinders to be so black.

Definitely check the power valves and I would suggest try some other power valves.

Your problem is something that was good but is now degrading, so look at the components that are the most likely to degrade in a time frame similar to what you have experienced.

4/15/167:31 AM

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