WOT=RPMs not going up

[98 chevy]

I just found out that the problem on my truck is NOT the tranny. It's the motor. I found this out because when it was in park, I revved it up at WOT and the motor would not revv past 3,000 rpms. Thats why when i'm driving and i get on it, the truck doesn't want to go once it gets to about 2,500 rpms. Does anyone know what the problem could be??

Thanks,
Nathan

[adampaul1964]

Could be the catalytic converter.

[98 chevy]

I'm going to take it to green & white automotive soon and see if they can tell me what the problem is.

[cascott325]

MAF sensor?

[98 chevy]

MAF sensor?
I'll clean it tomorrow and see if it works after that. It's def. not the fuel pump or fuel filter cuz my dad has a fuel pressure gauge. He said the injectors might be dirty though.

[GaryL]

What pressure is your fuel pump putting out? It needs to be around 62 psi.

[98 chevy]

What pressure is your fuel pump putting out? It needs to be around 62 psi.
I think it was around 55 or something like that.

[GaryL]

55 is too low, it looks like its time for a fuel pump. I went through this on my Suburban last summer. It was at 55-57 and had a hard time starting. It would run ok as long as you didn't want to pass anyone, then it would not get above 3500 rpms. I replaced the pump and it cleared everything up.

[98 chevy]

55 is too low, it looks like its time for a fuel pump. I went through this on my Suburban last summer. It was at 55-57 and had a hard time starting. It would run ok as long as you didn't want to pass anyone, then it would not get above 3500 rpms. I replaced the pump and it cleared everything up.
I took the truck to the shop today at around 11am..They called me at about 3:00 saying it needs a fuel pump and a fuel filter. They are also going to clean the injectors. I haven't been able to feel the power of my truck for soo long!! they said it will be done TOMORROW! :gasp: