If I convert my 89 5.7 back to a carburetor, what do I do with the electronic spark control and the egr? Can I just bypass the egr solenoid and run the line straight to the carb like in the older ones? How much does the electronic spark control really do? I still have to set the timing. Will I have to bypass some of the wiring in the control plug? How do I reduce the fuel pressure to be carb-friendly? I am having just intermittent problems with the TBI system. I rebuilt it, put in a new regulator, and new injectors. It seems like after 50 miles or so of highway driving an electrical event happens. Either an engine light comes on and the system goes "closed loop"-get an EGR code which I have replaced everything and checked all of the vacuum lines, or this morning the engine died on the highway. When I pulled over it started right up but I noticed a puff of black smoke-it had flooded for some reason. No engine light at all this time. I have been through everything on this unit. Rings, bearings and valve job, all of the gear cases and the tranny, and the TBI unit. This doesn't happen often maybe once every week or two, it's just annoying.
How hard is it to convert my 89 suburban to a carburetor
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BeachBourbon
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I've had carbs and I currently have a 1990 suburban with TBI. I will never go back to a carbureted unit due to all the problems with that old system. I cannot understand why you would want to get rid of fuel injection instead of just diagnosing the problem. Carbs are nothing but a constant hassle.