I have 86 gxl bridgeport and it won't rev past 3500 rpm feels like sencondary injectors aren't coming online it has stock 550 in primary and 1000 cc in secondary rtek 1. 7 had 720 in it and ran fine put brand new 1000 in the secondaries won't run put the 720 back still won't run now and iv replaced grounds and adjusted tps and got better when I'm sitting still can rev up to 5k but when under a load won't run past 3500 runs great till then but sjust cuts at 3500,and falls on it face please help starting to get tired of it

 

Do you have the 720's to put back in? Have you re tuned the rtek for the increase in cc/min I know Even a change of 90ccmin will fudge up andhhing and make it horrible to start/drive/rev Sorry seen u tried the 720's again, have u checked the maf?


Sounds like way to much fuel in the map,

 

I have tried resetting ecu trying t run the 720 runn all my grounds try a different maf everything idk why it is doing this

 

Does it try to run at 3500, or choke out and die? Do u have a wideband what's your a/f ratio?