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Message: <blockquote data-quote="94Snake" data-source="post: 1081701" data-attributes="member: 8739">For those of you who visit stangnet.com, i posted this same question, but my handle on that site is 94mustangcobra.Now my car is backfiring even just reving it up, and driving, any load put on the car and it just breaks up, popping, sputtering.Replaced fuel filter, plugs, wires, cap, rotor, coil.leakdown tests are good on all cylinders. Compression tests are within 5% of eachother. Pulled valve covers and verified no broken valve springs.Restabbed the distro, verified on #1 TDC...fixed a couple small vacuum leaks and replaced a line to the charcoal canister that looked suspect.Fuel pressure looks good under hood, i don't have a gauge in the car. Both of my fuel pumps kick on (255 lph in tank, 50 gph inline). N/A 347 motor. Shot the headers with a temp gun and all cylinders were even except 1 and 5 (two forward most), i rechecked the plug wires to make sure they weren't backwards. The other cylinders were running about 500 and 1 and 5 was running about 350 to 400. I'm guessing that must be a normal...Latest codes pulled were 511 (it has a chip), 212 Ignition control module, 311 and 314 (but these are smog codes, i pulled all of that stuff off in 2007). So i think my culprit is the ICM or the distributor pickup sensor (hall effect sensor)...Anybody else had a 212 code issue? What was the fix?</blockquote>