Won't rev past 3k

[Coposrv]

Been chasing a problem for a few weeks. Thought it was turbo related but not sure now. While driving on the highway if I floor it the truck will downshift but won't rev or pull past 3k. I lose all boost and have to get out of the throttle. What says the army?

 

[sootie]

any codes?

what are the mods on the truck?

sound like vgt actuator or vanes sticking on the turbo.

 

[Coposrv]

Mods are srl tune. Silverline turbo back and an 03 turbo. No codes. I set my scan gauge so I could video it while this happens. I saw the ipr % touch 87 wot but its usually around 70-75 wot sometimes lower. It's a hit or miss thing that's hard to duplicate.

 

[sootie]

is there a pid for vgt actuator performance?

 

[Coposrv]

Not sure. I think there is. I have an extra vgt solenoid I may try to swap this weekend

 

[mint-6oh]

What is icp and icp desired? What is fuel pressure wot?

 

[Coposrv]

I don't have my fuel pressure gauge in yet. Icp is 580-640 at hot idle. Wot 1850-1900ish.

 

[Coposrv]

I do know at 3k the fun stops and I am left with a black cloud behind the truck. I think I'm getting enough fuel but I have a blue spring coming and I will be installing the PF gauge this weekend. I've been real busy this winter and its just now getting nice out in the north east.

 

[swinky]

Does it hit 3k fine in neutral? Read icp voltage not psi. The tuning screws up the psi reading but you can get a solid voltage reading. Ipr looks good, if it's hit or miss I doubt it's fuel related. My money is on turbo since it's smoking so much.

Sent from my HTC One using Tapatalk

 

[Coposrv]

I'm going to add the pid for vgt duty cycle and icp voltage this weekend. I have a lot of maintence to do. It seems I'm either working 6-7 days and week and trying to get a boat and mustang ready for the season. I talked to gearhead and they're having me look at those two pids to help troubleshoot.

 

[Coposrv]

It will rev in neutral no problem. Only shows an issue under load. And intermittently at that.

 

[Seven.Three81]

Its a plugin. its like the problems they had with the ****ty duramaxs 03s. But I'm not sure with plugging it is but its the one under next to the trans sometimes u wiggle it or clean it an put dielectrical grease on plug .plug it back in

97 7.3 ATS diesel