Haveing a on going issue

[agnt549]

have a 03 H2 it runs fine when i first get it out and then when it gets hot i lose power i can have the gas pedal to the floor and only get like 1k rpm if i stay on it it will open up it does it on flat ground hills down hills ! have put new cats, muffler, throttle body, plugs & wires, coil packs nox sensors with plugs and radiator I'm at a lost HELP

[Olfart]

fuel filter???

[agnt549]

it's been replaced as well and it only does it when it gets hot

[SmokeyJoe]

I hope you find the problem as I am very curious what's causing this. I had a chevy truck that did the same thing, I never did resolve.

I checked everything, including dropping the tank and cleaning fuel lines.

My assumption was it was a vacuum line or maf. Never did get that far as I wound up trading it. Funny thing was it would run fine for about 100 miles after changing a fuel filter. So it ran good when traded...

[szmaters]

not sure...but i had a similar problem with another veh. it was the ficm sensor

[agnt549]

So i have a update / good news said F#!* the 1st dealerships toke it to anther dealerships it was there for 1day & half l got a call from them saying they found the issueS 1st one found wiring harness on left rear side had a short in it ,2nd one computer was Dead so yesterday i did a run with the H2 into the north back county of san diego HOLY bat man it ran up and down those hills like a bat out of hell i don't know if i said it but my H2 is a 180" limo