3 failed flex fuel sensors? im lost
supercharged ls2 on 411 pcm with 2002 suburban flex fuel tune.
My car was running great and then I put Granatelli coils on there and thats when it went down hill. Anyway my car started to run a little lean and I looked at my ethanol content sensor and it was reading 37.6%. I looked at my tune and that is the default percentage when the sensor fails. I bought a new sensor hooked it up and the sensor immediately read 100% ethanol. Then seconds later it slowly falls down to 37.6% ethanol again. At this point I reach my hand in the engine bay to mess with the sensor wires and I get shocked. Long story I got rid of the coils and put my original ones back on. So I assumed the coils were arching or something and fried the second sensor because they're somewhat close. Bought a third sensor and it did the same thing. 100% then slowly down to 37.6%. Ive checked wiring ground is good. Power wire shows 12v. Signal wire shows 5.07 volts. Any ideas