Originally Posted by
EagleMark
To check idle and driveability you can.
What chip are you running with a large cap HEI? Spark latency is differant by as much as 11 degrees between the 2. Both will be 0 with timing wire disconnected, wonder what your connected timing is at idle?
Running EFI wiring next to or touching spark plug wires is a non-no... that must be a conversion?
I wonder if it makes a difference whick side injectors are on since they are both same colors?
Didn't sound near as noisy.
Did we ever look at your data log? 5.7L injectors in a 5.0L would cause issues? Wish I could be more help...