540 sparkplug issues at idle???
Just going over th new camaro I just purchased. The motor is a Bill Mitchell 540 and the previous owner just drove the car for 2 years and never really did any tuning maintenance on the car. It has been a bear to start when its cold and it started popping out of the exhaust while it was idleing and getting worn. My good engine buddy told me to pull the plugs, he bet they were fouled and he was right. They were all black from a rich condition but #2 an #4 were extremely dark compared to the rest, and thats the side that was leaving a black spot on my garage floor.
So I installed all new plugs and let the car idle up to 180 degrees and shut the car off. I started pulling plugs #1 and #3 looked great so I went to #2 and #4 and they were black already. I started to think sparkplug wires so I tested the Ohms and I am getting around 900 on #2 so I know its getting spark.
This motor is completely new to me, I haven't even gone around the block yet. I bet the motor has less then 2000 miles on it.
What else should I be looking at? The ignition is a Mallory Unilite and Coil and a Crane Fireball box.
67 Camaro Pro Street, 540 Bill Mitchell Merlin big block, Merlin Aluminum heads, Holley 870, hydraulic camshaft, 2" Hooker Super Comp headers, Mallory and Crane ignition system, TH400, 2600 stahl, Ford 9" w/ 4:10 gears and posi.