Alright guys decided to do a WOT pull on the way home and once I hit 2nd gear at 6k the car cut completely off. Completely stock lsj. Gm stage two from factory. Coasted for about 1/2 mile to pull over. Turn the key off then went to crank it and it barley wanted to run then cut back off. I have a half of a tank of gas before I floored it. Once I got it to crank my gas light popped on and said low fuel. Where the heck did my gas go. Anybody had this problem yet. I thought I threw a rod when it happened. Oil is fine and couldn't smell gas anywhere.

 

How many miles on the tank of gas?

 

Roughly 350.

 

It pulled some codes.
P0461-fuel level sensor A circuit range/performance
P0300-random multiple misfire
P0171-bank 1 system too lean
P0335-crankshaft position sensor

 

Probably bad fuel pump?

 

That's what I was thinking too but I can drive it and it cranks up and runs fine

 

If you're driving around normal its not that demanding on the fuel system, going WOT works the fuel system a lot harder than normal driving.

Also if you're at 350miles on that tank and it says half full, your fuel sender is def bad. I want to say I averaged that with my base model for almost a full tank not a half

 

Well I filled up just a few minutes ago from being on it empty. I put in $16 of gas and my needle went back up to a full tank. Which makes sense because I had a half tank before it dropped to empty.

 

As in you only put $16 worth pre-paid or you filled it till it clicked? If you're getting 350miles on 6-8gallons of fuel you are near 50mpg

 

What I'm saying is there is already a half a tank of gas in the car but the computer with only reading empty so therefore when I filled it up it only took $16.00 because it wasn't really empty do you see what I am saying

 

Bad fuel pump sounds like. This sounds similar to what happened in my blazer years ago

 

Let's hope not. Lol I'll driving it again after I get done at the shop. Gotta finish dipping a shotgun then I'll do another wot pull on the way home. Close to home just incase I break down. Won't have far to go lol

 

You couldn't order the Stage 2 kit from the factory.

Sounds like the CPS (crank position sensor) took a crap. Try replacing that first.

 

QFE

If you started with a full tank, dropped to a half tank in 350 miles, then you have reached hypermiler super platinum status. Sorry, but I don't believe it.

 

my car did that when i first got it .... went from the top of 3rd to 2nd lmao .... i dont think that your problem though

 

No I started with a half a tank of gas. When I once the car cut off going down the road it said I was on empty. Not a full tank.

 

There it is.

 

The stage 2 kit was on the car when I got it. The looked to be garage kept because how clean it was. The engine bay was spotless. It's got 154k miles on it. I bought it with 149k

 

No I dont see what you're saying because it doesnt make any sense.

Did the pump click as in the tank is full because the pump sensed back pressure? Or did you pre-pay $16 in fuel?

If you get 350miles to the half a tank you said you went through you are at epic cobalt mpg

 

OK, sorry, i'm just confused. you got 350 miles off of a full tank?

 

Yes the pump clicked. The car now registers full. That's why it only took 16 dollars to fill up because there was still a half of a tank of gas even though it registered empty.

 

Yes that is correct and I average 26 miles per gallon

 

So did you get 350miles on half a tank? Or is that what you get for a full tank?

 

Ok that makes more sense now, from how the question was asked and you answered before it sounded like you got 350miles on half a tank, which would explain the cut out.

Replace your CPS since you have that code

 

Yeah I went ahead and ordered one. It should be here tomro. Only 25 bucks. Prolly cheaper with my discount. I find out tomro. Any clue on where that's located by the way?