Hi I have a 66 charger that idles perfect in park. When you put it in gear it pops and backfires but the timing appears to be OK I think. If I advance or retard the timing it just gets worse. any one have any good ideas...I will even take some bad ideas.
Could you have crossed a wire/ When there is "NO" load on an engine with a crossed wire they seem to run okay. When you rev them up they seem to run okay too. But when you put them under any kind of load the missing is very noticable.
I do not think it is a vacuum leak because then it would run rough but not pop and backfire, and if you were to advance the timing it would "ping" because the fuel and air mixture would be too lean.
I am still thinking it is a flat lobe on the cam....sorry.
OK guys thank you for the input. I already started thinking of crossed wires. I put them back the way they were when I drove it home. It was backfiring then too.So.... not to ask a stupid question but can anyone tell me the piston order on the block? I have never had to know that before. I already found the fire order.
If the engine is a 273, 318,340,360 "A" engine the distributor rotates clockwise. The cylinders are the same as chevy small block that is even numbers on the passengers side and odd numbers on the drivers side.
On the "B/RB" engines that is the 361,383,400,413,426 wedge, 440 the cylinders are numbered the same way but the distributor turns counter clockwise
Is it backfiring through the carburetor, or is it an after-fire out of the exhaust? The extra load of the torque converter can cause you to be lean, you may need to richen up the idle a little bit on your carburetor.
older model mopars, like yours, had some trouble with the lifters bleeding down and not pumping back up, especially if you over rev the engine. This will appear to be a flat lobe on the cam, or timing chain jumped. before tearing into the engine, pour 1/2 quart of ATF thru the carb with the engine running at moderate speed. Pour slowly and do this outdoors as it will cause a lot of smoke. I have had to do this several times on my 1967 dodge 318, and it has worked every time...If your problem started "all at once" and you are the dark as to the cause, a couple of bucks for ATF is a cheap way to test .
Once again I would like to thank all of you guys taking the time to respond to my 'typo' question. Last night I was thinking crossed plug wire and then Scholman said the same thing. I had the fire order and just had to figure out how the cylinders were numbered. The #5 and #7 wires were crossed. I feel bad everyone tried to help and it was just a stupid thing but THANKS :thumbup: