98 Tahoe issues

[muddinman]

I have a 98 tahoe 2 dorr 4x4 5.7. I have changed the plugs, wires, cap, rotor, fuel pump, fuel filter, cam sensor and crank sensors. The problem is...it will stumble / hesitate very badly at anything above 3k rpm for a extended period of about 2 min. Any ideas. It is not throwing any codes exept for the crank sensor interm. code. but that doesnt turn on the CEL, it just throws it in history, any ideas would be helpful, thanks.

 

[gpracer1]

How are you driving it when it does this? How does it act at WOT wide open throttle ?

 

[muddinman]

if i remember correctly it does do it at wide open but only when the rpms go up, not when you first mash it down. but i have recently been just raising the rpms in the driveway in park, it will o it then as well.

 

[Cupcake]

Does it have an after market intake system?

 

[Donnie Yukonie]

MAF sensor dirty? or dirty EGR?

 

[SunlitComet]

Can you get a fuel pressure test done during idle and raising the rpms? and what specific code are you receiving?

 

[muddinman]

no aftermarket intake, it does have a throttle body spacer but that was there before the issue started. nothing dirty in the MAF or EGR. I will try the pressure test as soon as I can, the code was P0339 I believe, I dont rememebr but will scan it again tonight to find out.

 

[SunlitComet]

For the p0339 code reinspect the crank sensor tip for metal shavings the wire harness and connecter for loose or bare connections. When you changed the crank and cam sensors I assume you had the aligned to each other but did you do the crank relearn procedure for the crank sensor alone?

 

[bowtiefreak]

That spacer it junk, get rid of it....trust me. I had a guy let me try one, I took it back teh next day. Also never a bad idea to buy a can of MAF cleaner, it's like $7.

 

[muddinman]

going to take off the spacer, it was on there when i bought it, but i did not do a relearn, whats the procedure for that and is it normal to have to ddo that when you change the cam or crank sensors