The car is showing a miss on the #5 cylinder, occurs only when engine is under boost from the supercharger. Occasionally also shows miss on #4 and less frequently on #6. This was found by using a scan tool.
Have swapped plugs, wires, injectors, injector wires, and coils with those from either #3 or #1 cylinder, but problem stays on #5. Also tried a new ignition control module. Engine runs smooth in the driveway at all rpms. Only misses under load and only under boost conditions.
I'm thinking fuel pressure regulator?? fuel pump??
The fuel filter was recently replaced. I run 92/93 octane.
Problem occured after car was parked for several months with only being started every couple of weeks and idling to operating temp. The car has
177,000 miles. Ran great before parking it.
Any help would be greatly appreciated.
Thanks, Jeff