hey I don't have an answer for you but I am getting the same thing. Are you blowing small amounts of black smoke from your exhaust?
I didnt read all the responses, but I would suggest checking the O2 sensor ground wire. It is orange, has a ring terminal end and bolts to the middle of the intake in the rear.ok so i just put a new long block engine in and im at about 400 miles on it. but now im getting a check engine light and when i check it with the code reader i get a 41. which is "HEGO (HO2S) sensor voltage low / system lean" I have been having a hard time getting the timeing just right so i think thats what it is. i just can't think of what else it can be with EFI.
Absolutely, and I'd be willing to be that more than a single wire's insulation was damaged. You need to re-route those wires, as far away as practical from the exhaust system, and inspect the rest of the wires along that part that was burned.ok so i check everything over and all i found so far was that the wire that goes to the 02 senser got too close to the headers and look a little melted on the out side. could that cause a ground and/or the voltage to get messed up?
i dont see this wire. unless it is one of the three that go into the senser. but none of them connect to the middle of the intake.I didnt read all the responses, but I would suggest checking the O2 sensor ground wire. It is orange, has a ring terminal end and bolts to the middle of the intake in the rear.
No, it's not near the sensor. It sticks out of the loom of the wiring harness that traverses the back of the engine. You can find it by putting your hand around the loom and following it across the back of the engine.i dont see this wire. unless it is one of the three that go into the senser. but none of them connect to the middle of the intake.
yes the timing will change, but you will not have any idea what the base timing is. the engine changes the advance only.yes exactly what Sig said.
also anytime you make adjustments to the timing the spout must be pulled regardless how minor otherwise it wont really change