Bad idle

[34bud]

85 GN JUST REPLACED- NEW WALBRO PUMP-HOT WIRE/NEW GREEN STRIPE INJECTORS/NEW COIL/MOD./NEW FILTER/ ADJ. FUEL REG./ NEW PLUGS/WIRES/ PROBLEM? WITH THE OLD INJECTORS I SET THE FUEL PRESURE @ 30# WHEN I PUT IN THE GREEN STRIPES IF I GO OVER 20#-25# WITH THE VAC. OFF AND I GET INTO IT HARD BLACK SMOKE AND A BAD HESITATION. AT THE LOWER PRESURE ITS FINE? ALSO AT A IDLE IT SEARCHES. I HAVE NOT REPLACED THE ORIGINAL CHIP.

 

[BuickTV6]

My recomendation would be to upgrade to an 87 ecm and maf, then have a chip burned for your combo. The stock 84/5 chip tends to run rich if you try running the same psi levels for stock injectors. You have to lean it out quite a bit to get the running good. You would have a lot easier tuning to swap ecm's and have a chip burned. HTH