I was driving down the highway Saturday floored it and it wouldn't accelerate, actually kind of bogged down. First time it has ever done that. It will still go and run fine but will not accelerate under full throttle. Any suggestions?

 

So it won't do anything when you go wot?

 

The rpms will go to 4500 and it struggles to go any higher, I can get it to 5500 but its a chore.

 

Maybe a bad TPS, fuel pump, filter or regulator. Any codes? Have you looked at your plugs? Compression test? Do you have a wideband? How long have you been running that tune?

 

It threw 6 codes: p0137,p0157,p0172,p0175,p0430,and p0446. I cleared them as soon as it started and it didn't get change anything. TPS is good, gonna do fuel filter and pump if needed tomorrow. Thanks for the help, I'll post results when I get them.

 

Fuel pump was the problem. I was a little skeptical cause this truck acted nothing like my SS when the fuel pump went out of it. Thanks again for the help.

 

I was gonna say the same thing. At least you could drive it home before it completely crapped out. Mine gave me a little of the same thing then it took a crap . Next thing u know flat towing it was. The one thing I would suggest is if u plan on any big power adders then swap out the old one for a walbro or something of that level. I didn't do it when I had then tank dropped and I kick my self in the *** now because Im close to what my stock pump can handle. So hopefully learn from my mistake.

 

I have lost my low end, truck won't even power brake! I'm already kicking myself, I went back with factory pump.