Convert to HEI - The 1947 - Present Chevrolet & GMC Truck Message Board Network

joescott · 12-22-2009, 06:33 PM

Hello all. I have a 1987 gmc suburban with 350 tbi. I bought it with a bad rod knock, so I only ran it for a moment when I got it.
After rebuilding the motor, I am getting code 43's and the truck starts running poorly. I have replaced the ESC as well as the knock sensor and the main computer.

My question is this. Can I go to the junkyard, buy an HEI distributor and run a wire to it and bypass computer control of the timing? I know the service engine
soon light will come on, but will this effect anything else?

Thanks in advance
Joe

12-22-2009, 06:33 PM	#1
joescott Registered User Join Date: Nov 2006 Location: Georgia Posts: 27	Convert to HEI Hello all. I have a 1987 gmc suburban with 350 tbi. I bought it with a bad rod knock, so I only ran it for a moment when I got it. After rebuilding the motor, I am getting code 43's and the truck starts running poorly. I have replaced the ESC as well as the knock sensor and the main computer. My question is this. Can I go to the junkyard, buy an HEI distributor and run a wire to it and bypass computer control of the timing? I know the service engine soon light will come on, but will this effect anything else? Thanks in advance Joe



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