I am about to pull my hair out..... I have an tbi set up I have installed on an 1972 amc 304. I orderd the kit from afi in hopes that it would be plug and play as I am going this for a customer and wanted it to be fast and esy. I have now decided that I should have built my own like i did on my onwn cars. that said I am tied of dealing with afi and not getting any where. I have tuner pro and an apu1 from moats..... so on to the truck. it is a stock amc 304 in a stock jeepster. it starts and idels relitvely smooth but on heavy tip in it backfires throught the tbi. the current tune I have on it is a stock 305 tune with the egr and vss flags shut off. I got rid of the afi chip due to it running the timming up to 41degs at idel. I thought that was my problem. how ever it was not. if I increase fuel press (from 11 to 25 ) the severity gos down but it is still there. sorry for the rambleing and spelling. If there is any other info I missed let me know Thanks for the help Joe
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