I just completed any engine swap (89 K1500) to a TBI-7.4L from a TBI-5.7L. I also swapped in the 747-ECU and the TBI from the 7.4L engine. I did leave off the smog pump. My question is the engine seems to be running OK but at ideal the A/F mixer gauge show the engine is always rich with little or no ECU adjustments being made to correct for this imbalance in fuel air mixture. Am I missing something? I need your help!
Thanks
Byron T.
Engine running rich at ideal only with no ECU correction.
Moderators: robertisaar, dex
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You have 80#/hr injections with that big block throttle body.
You have the big block chip on the computer correct? I wouldnt run that motor with the chip for the big block since thats a good part of your problem. If i were you id put your stock 350 computer back on and tone down the fuel pessure a few PSI or until it didnt run so rich.
You have the big block chip on the computer correct? I wouldnt run that motor with the chip for the big block since thats a good part of your problem. If i were you id put your stock 350 computer back on and tone down the fuel pessure a few PSI or until it didnt run so rich.
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