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I am swapping an l67 into my 93 s10, and was really hoping to run e85 with a flex sensor. After some research I found that it is not possible with the factory GTP OS. After looking around I found that an 02 tahoe with a p01 ecu is flex capable. This same os can be configured for a 4.3 engine. Was curious if anyone has had any success getting the 3.8 to run using the 4.3 os?
Thought about it, but there are 2 problems to overcome. 1) 3.8 reluctor does not match ls1 or 4.3. The inner ring on the 3.8 is similar and you may be able to modify. Or mount a 4.3 reluctor on the balancer. I believe the 3.8 has a 1x cam output. 2) 4.3 os is designed to work a distributor. It wont power the 3.8 coils and I am not sure it will work with the ls coils.