This is a very interesting discussion. My 97 S10 blazer is showing some of the same codes. History is that I put a used engine in it four years ago and has ran fine up till a few weeks ago and the son ran it out of gas because of a miss-reading fuel gauge. Put a new assembly in and it ran fine the first tank and a half then faltered throwing the MAF code about low voltage and we barely got home. The fuel gauge also was working OK but when it faulted the gauge went down and then all the way past almost to the 3 o'clock position. I pulled the tank again and checked the pump , it had good flow at the beginning and slowed down after a quart of gas was pumped(about 7-8 gallons was in it). The Ohm value of the sensor read good. Put it all back together and drove it out of the garage and the gas pedal seemed to stick with it running at 1700 RPMs. The throttle plate was closed at this time. Shut it down and it restarted with a slower idle but not completely down to 600. The gauge was working for the first five minutes and the jumped all the way over again , after shutting it off a couple times it went to reading close to where it should read.
I have not had the time to check the fuel pressure yet which HOBO commented on. Sprint where did you find the short , in the main loom or can you give me a more closer place to look, it almost sounded like something tripped when it ran weirdly. I will get back to working on this after my kidney stone passes which stopped me for now from doing anything outside. I really appreciate the help you guys can give and will let you know when, If, I get mine repaired, Kinda frustrated right now with it.
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