My Blazer is driving me bonkers
 

I have a 2000 chevy blazer. I gave the truck a tune-up myself, the plugs and wires and then the #2 plug sits behind the steering column so I took it to a guy and he changed that one for me. On my ride home the check engine light came on and stayed on. Though, the light came on the truck was starting right up on first try and was running nice even the power had increased. :icon_hyper:

Suddenly, it wouldn't start right away, I'd have to crank it 2 or 3 times and it started stalling when riding e.g. I would be going 55 and suddenly I would lose power and it would go down to about 30, rpm's were going crazy, then I would press the gas and it would go slower. When I release the gas it would seem as it wanted to go faster but it wouldn't. :icon_doh:

I had autozone put it on the machine and it stated that the fuel pump sensor was bad so I just replaced it. The check engine light went out and has stayed off but the stalling and lost of power is worse then ever. Can someone help me, I am losing my mind already with this truck.:icon_no:

Sounds a lot like your fuel pump is going out. or you have a leak in the spider assembly, i would start with a fuel pressure test, and im about 99% sure you will find a problem with the pressure. here is a link on how to do that. https://blazerforum.com/forum/tech-a...agnosis-23038/

Welcome from New York. Also like what was stated above check your fuel supply.

"Thank you" so much, I will let you know how I make out.

Evelyn