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I did my 411 swap today.
97 k2500 7.4 with Whipple.
It ran great before the swap. Now it runs like ass, I have to hold the gas to keep it running. Not throwing a CEL but I pulled codes p0103 and p0713. Connections look good on the pcm.
Any ideas? I've got towing to do this week.
MAF is not being used (DTC P0103) so sounds like VE table is wrong.
Was it tuned for the SC...?
No, just a base tune. I'm still running the Whippletronics until I get my larger injectors.
I'd like to keep maf functionality. I may need a better base tune
Ok. Got back to the house. It's misfiring on all 8. I'm thinking a timing issue. I also noticed a small scorch mark on the pcm. I got it used, so for all I know, it was fried. I'm picking up another reman pcm today and going to go from there. Any other ideas? I know these have computer controlled timing.