Originally Posted by FattyBoomBatty
Ok, some may laugh, others may cry, I was glad to find out everything was ok afterward. When I originally wired the GM air temp sensor and coolant temp sensors, I was under the impression that you gave them +5v to one side and the input wire to the AEM read the resistance, or a change in voltage and the sensors used the engine as ground. Called AEM, and they told me I was stupid, then I learned the right way to do it, nothing was fried, and instead of +5v signals on both sensors (I had this going on all along, couldn't figure it out), I finally had normal readings from both of them. It was 54 degrees in the garage last night.
So, I took out a LOT of fuel, increased timing (which I finally was able to measure) and got it to run for a couple seconds. But, here's a couple new questions. First, what causes backfires in the intake manifold, generally, and what are normal things done to alleviate that problem. Second, when it was running, it sounds like a harley, really rough and shakey, like it was missing on a couple cylinders, or one. It hasn't had new plugs/wires in like 4 years (two of them the car sat, but before that I had run leaded gas sometimes, they are pretty fouled. Might that be a cause of that? Also the gas is old.
Lastly, does the AEM let you know if certain components are bad, like perhaps one or two of the injectors aren't firing because of a bad connection or the coilpack is malfunctioning? (this is related to the second question).
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