[mattymx]

Just got back from my test trip where I was going to take a lot of video but I came across an old problem again. Or what I think is a problem. This turbo is really working well but this issue would not allow good data.
When the truck is cold it runs really well. When it is just being driven in town and not getting worked hard all is good. When I start to work it driving up the mountain raods or long grades is where I have this problem. The truck falls on its face and I have to almost floor it to light the turbo. There are no boost leaks so we can rule that out for now, but hot start ups are fine. Unfortunately my friends Snap On scanner took a dump and I cant test with it.
It seems to me that when the truck is getting worked and the oil is really hot, the HPO system is having issues. Maybe a failing ICP or IPR? But it only happens when I am working the truck hard up hill. I am also thinking my lack of boost is also caused by this as well because even when it is not being worked hard. Maybe the HPO system cant keep up and it just does not pull past 20PSI and feels flat. Do I just go buy a new IPR and ICP and hope that cures the issue?

 

[gregrob]

Do I just go buy a new IPR and ICP and hope that cures the issue?

I vote NO. For the price of those two items you can have Auto Enginuity and completely eliminate this guessing game.

Do you have an old laptop? If not, another 150 should score one suitable to the task.

It's to tough to say without watching what's actually going on.

Do you still have stock EBPV?

What are EGT's like when this happens?

Any check engine light?

 

[mattymx]

I have the high flow outlet so I am not running the EBPV. My dad has a laptop I could use AE on so I will look into that.
The truck smokes and almost bogs until I light the turbo but that BB lights and clears the smoke and EGT's are high with low boost. I can still hit 20 PSI when this happens but it does not feel right. This use to happen a bit with the stock turbo under the same situations and I have a new 6.0 IC and boots and have done a leak test and I only bleed down at a rate of 1PSI every 15 or so seconds so that seems to rule out boost leaks. HPO is the only thing I can think of...

 

[gregrob]

I would also check fuel pressure.

 

[thehammer69]

It wouldn't surprise me if this was an O-ring issue.

Hammer

 

[gregrob]

It wouldn't surprise me if this was an O-ring issue.

Hammer

IPR O rings? Injector O rings?

Is it hard to start when this happens Matty?
Could be IPR O rings making it very inefficient when it gets hot.

 

[thehammer69]

IPR O rings? Injector O rings?

Is it hard to start when this happens Matty?
Could be IPR O rings making it very inefficient when it gets hot.

Can be either one....both can cause HPO bleed off, especially when the oil is hot and thin.

Hammer

 

[mattymx]

Hot starts are fine. Never an issue.

 

[TerminatorEngineering]

Someone near you should have Auto E that you can barrow. That would be my first step. Check ICP and Duty cylce. Also, try unplugging the ICP sensor, that will throw your PCM into default, which means 770psi at idle and no more then 2570 at WOT. If the truck runs better, I would look at the ICP sensor.

I'm guessing it's not the ICP sensor though. Most likely IPR or injector issues.

 

[boggerr]

Agree. See if you can get the AE, just went through basically same problem and it was the injectors crapping out.

 

[mattymx]

Agree. See if you can get the AE, just went through basically same problem and it was the injectors crapping out.

I wish the SD's had a return type system like the OBS's do. That way I could look at the fuel filter and if it was black I would know the injector o-rings are failing. It does use a bit of oil, though. I am running Rotella synthetic right now. I wonder if I would see any results using regular...

 

[mattymx]

Someone near you should have Auto E that you can barrow. That would be my first step. Check ICP and Duty cylce. Also, try unplugging the ICP sensor, that will throw your PCM into default, which means 770psi at idle and no more then 2570 at WOT. If the truck runs better, I would look at the ICP sensor.

I'm guessing it's not the ICP sensor though. Most likely IPR or injector issues.

I will try that tomorrow. Thanks Joey.

 

[Haul_n_horses2]

Someone near you should have Auto E that you can barrow. That would be my first step. Check ICP and Duty cylce. Also, try unplugging the ICP sensor, that will throw your PCM into default, which means 770psi at idle and no more then 2570 at WOT. If the truck runs better, I would look at the ICP sensor.

I'm guessing it's not the ICP sensor though. Most likely IPR or injector issues.

How high does the duty cycle on the IPR get at 3400-3600 psi?

 

[thehammer69]

How high does the duty cycle on the IPR get at 3400-3600 psi?

I think he only has a single pump, so i doubt he is running that high of ICP.

Hammer

 

[TerminatorEngineering]

How high does the duty cycle on the IPR get at 3400-3600 psi?

Between 37-41% usually(twin pumps with A code injectors).

 

[DSALF250]

Between 37-41% usually(twin pumps with A code injectors).

Im having the same issues right now! Going out to hook up the AE.be right back.................

 

[mattymx]

I did throw a 1211 code for ICP. I need to get my friends scanner fixed so I can read what is going on while I drive. I dont know anyone close with AE.

 

[Fever]

what towns are you close to?...maybe someone here can help out

 

[mattymx]

I am in Big Bear which is in the mountains near San Bernardino and Riverside.

 

[TerminatorEngineering]

I did throw a 1211 code for ICP. I need to get my friends scanner fixed so I can read what is going on while I drive. I dont know anyone close with AE.

I can fix that 1211 for ya.....oke: