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Username Post: Help please 350 tbi boosted with surging problem        (Topic#343018)
Forum Newbie
Posts: 3

Age: 37
Loc: olympia wa
Reg: 03-01-17
03-02-17 10:27 AM - Post#2679333    

hello 3 years ago i started this project. its a 1990 chevy k1500 with a 350 tbi engine. it surges at idle AFR is going from 12-22.9 Ive have been trying to fix this or the last three years. if i unplug tps is mellows out but still there i have a dynamic efi computer that i use tuner pro to tune it with. a little history on the engine i built its a stock block thats .060 over flat top pistons 10 to 1, stock crank forged rods, the cam is .509 lift has roller rockers aluminum heads with 2.06 intake 1.6 exhaust edelbrock tbi intake the throttle body with 2 1/16 bore and 90 pound injectors running at 20 psi. the supercharger is putting out 7psi, im running a 2 bar map, I have tried a 1 bar also and no change ive spent so much money and time on this i just want it to work but im about to give up and go to a carburetor set up any help or any ideas would be great


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