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Originally Posted by battlr  I was told the same thing by TPS. I have a C&L as well. I have idle issues, but only for the first minute or two after starting up the car if it hasn't been driven in awhile. Usually in the morning when its cold. But most on here have said they haven't had problems with their's. I don't think it's the MAF. I swapped out the bosch plugs with Autolites. I'm waiting for the ignition box. My only problems are what I said previously, plus a lot of hydro carbons at idle, and miss firing still when I'm in gear for awhile at a constant rpm and then mash down on the gas. I have no clue what going on, still trying to figue it out. its a little pop then goes away and picks right back up. I'm thinking maybe the new 24lb. injectors are to blame. Maybe the stock 19lbs. should be put back in. But then I would need another sample tube. Trouble shooting sucks when you really have no clue. PM me when you find out whats going on with your motor. Or feel free to call me. And I'm still running rich. Did you ever get that worked out? | I had a problem not to far back with miss firing it turned out to be my distributor cap but since you just changed the plugs i would check the firing order to make sure that you didn't mix up any wires. if that doesnt fix it check the gapping on the plugs. Autolites dont come pre gapped. i know for my 1990 the gap is .044
if that helps. That could also be why its running a rich. the wrong gapping means improper spark which means not enough combustion. I would also look into different gapping for the 24lb injectors.
__________________ 1990 Mustang 5.0 LX Standard with a forged lower half, mild racing cam, aluminum racing driveshaft, bbk cold air intake, short throw gear box, aluminum H pipes with headers, roll cage (welded), 8.5 MSD sparkplug wires, MSD distributor cap w/ rotor, E3 sparck plugs | 
