HI I HAVE A 90 IROC5.7 16,000 MILES .IT HAS A MIS AT IDLE .I CHANGE THE FUEL FILTER WHICH WAS CLOGED .CAP ROTOR WIRE PLUS.CLEANED INJECTORS.DID NOT CHACK FUEL PRESSURE YET .NO CHECK ENGINE CODES.PASS EMISSION TEST .TACK DOES NOT MOVE.EGR LOOKS OK.COULD IT BE A BAD INJECTOR.LISTENED TO THE INJECTOR SOUND THE SAME. THANKS RON.

 

When you replaced the cap and rotor, did you plug all the wires back in??? My old HEI setup got the tach signal from the dist. I am new with this TPI game

Will

 

Better yet, did you get the wires plugged in correctly? How are your injectors? You might have to go to a tech college with them and have them flow checked.