Hydra installed. Now truck has miss at idle after putting engine under a load. - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
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post #1 of 7 (permalink) Old 10-12-2019, 06:47 PM Thread Starter
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Hydra installed. Now truck has miss at idle after putting engine under a load.

I have a 2000 f250 automatic 7.3. The truck has 200,000 miles. The mods include: 6637 intake, straight pipe exhaust, and now a php hydra.
The issue I’m having only happens when the hydra is installed on the truck. When putting the engine under a load (~2000 rpm) for more than about 5 seconds and letting off the throttle the truck begins to “miss” or search for idle. The longer the truck is under a load and the higher the rpm the worse this issue gets. It will stall out sometimes while searching for idle. I have noticed when the truck is searching for idle I notice the dash lights dimming and getting brighter as it is searching.
I can not make the truck repeat this issue in the stock setting.
What I have done this far: First I contacted PHP, and the chip was sent in and tested good. I have installed a known good IPR, good ICP, new batteries, new alternator, cleaned both the EBPV sensor, tube, and connection points on the the truck. The truck was hooked up to a snap on scan tool and the only code was a P0476 Exhaust Pressure Control Valve Perform.
Anyone ever have this issue or know what it might be? Thanks

2000 F-250 7.3
-lots of tint
-smoked cab lights
-2010 mirrors
-20 inch 2013 f250 wheels (will be replaced soon)
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post #2 of 7 (permalink) Old 10-12-2019, 07:55 PM
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Re: Hydra installed. Now truck has miss at idle after putting engine under a load.

I would get some sort of monitoring device. Like torque pro or car gauge and watch you icp pressure. Also might want to check fuel pressure too. You will need to buy an adapter for the fuel bowl.

01 f-250, Standard
Rev tech 4" lift, 37" military wrangler Mt tires
KC diy 66, Full force 160/100 and custom tunes from PHP
Banks intercooler and full 4" exhaust, Diy S&B intake
Diy quad feed, Hydra, Isspro boost, pyro, and fuel pressure
3/0 battery cables with military style terminals
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post #3 of 7 (permalink) Old 10-13-2019, 07:21 PM Thread Starter
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Okay, I’ll check them when I get a chance.

Would still like to see if anyone has had this issue?

2000 F-250 7.3
-lots of tint
-smoked cab lights
-2010 mirrors
-20 inch 2013 f250 wheels (will be replaced soon)
7.3_Driver is offline  
 
post #4 of 7 (permalink) Old 10-14-2019, 02:24 PM
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Re: Hydra installed. Now truck has miss at idle after putting engine under a load.

I havent heard of any issues like this. But the more I think about it the more I think it's a fuel pressure issue. Turn up the power the more fuel you use and you can have issues. I would change the fuel filter and Google hutch mod.

01 f-250, Standard
Rev tech 4" lift, 37" military wrangler Mt tires
KC diy 66, Full force 160/100 and custom tunes from PHP
Banks intercooler and full 4" exhaust, Diy S&B intake
Diy quad feed, Hydra, Isspro boost, pyro, and fuel pressure
3/0 battery cables with military style terminals
Sbluke55 is offline  
post #5 of 7 (permalink) Old 10-14-2019, 03:24 PM Thread Starter
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I have already done the hutch mod. I forgot to mention that earlier. But I will probably still make a fuel pressure gauge this weekend.

2000 F-250 7.3
-lots of tint
-smoked cab lights
-2010 mirrors
-20 inch 2013 f250 wheels (will be replaced soon)
7.3_Driver is offline  
post #6 of 7 (permalink) Old 10-17-2019, 09:23 PM Thread Starter
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I was able to get some ICP and IPR numbers today.

ICP voltage @ idle: 0.75-0.85 volts
ICP voltage @ 2500-3000 rpm rev: 2.75 volts

IPR % @ idle: 11-12 %
IPR % @ 2500-3000 rpm rev: 21%

How do these numbers sound?

2000 F-250 7.3
-lots of tint
-smoked cab lights
-2010 mirrors
-20 inch 2013 f250 wheels (will be replaced soon)
7.3_Driver is offline  
post #7 of 7 (permalink) Old 10-17-2019, 11:01 PM Thread Starter
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https://www.amazon.com/photos/shared...fQ7xGXdBkNfjLB

This is a video of the issue. You can watch the Rpms bounce after suddenly letting off the throttle when under around a 2000 rpm load going up a hill.

2000 F-250 7.3
-lots of tint
-smoked cab lights
-2010 mirrors
-20 inch 2013 f250 wheels (will be replaced soon)
7.3_Driver is offline  
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