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Username Post: Code 43
Jempoliti
Newbie
Posts 3
05-17-23 08:33 PM - Post#2858066    

I'm having an issue with code 43 popping up on my 1994 chevy silverado. I just did a 4.3 to 5.7 swap and I can't figure out what's Making this code appear. The tbi isn't spraying gas as it should an the transmission is popping out of second like its in neutral or back in first. I've swapped proms from a 94 5.7. I've replaced the coolant temp senor/connector, knock sensor/connector, pickup coil, ignition module, distributor cap/rotor. I picked up a new O2 sensor an will replace that next but if that don't fix it I don't know what else to do. If anybody can help me out I'd greatly appreciate it. I'm going on 3 weeks now trying to figure this out.
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