Well i was driving home after disconnecting my trailer, on the highway a few minutes away from my house i noticed the truck started to feel like a sputter/jerking feel. The more i pressed on the accelerator the more i felt it. I soon realized it would not let me go over 65mph. Now i got very worried, lots of thoughts went threw my head such as, i wonder when it will die on me? or when will i get a check engine light on? Even worse my truck is used daily for my auto transport business, and without my truck i make no money. Pulling into my community, from a stop sign when i started to accelerate, i felt the same sort of sputter/jerking feel. I finally made it home, left the truck running and looked underneath, and under the hood, of course i did not see anything unusual. I reved up the engine while in park and realized as it got close to 2,500 RPM it would do what happened while i was driving, it would kind of choke/sputter and would not allow me to rev it over 2,500 at all. I should mention i have the spartan 210 tune always on. I shut the truck, checked for codes with the dashdaq, found none. I still have no check engine light or anything. I then started the truck, and went for another drive on the highway, it now was perfect, i did a few WOT runs and got up to 90mph. (most i ever went with this truck). I got back on my driveway, tried reving it up and it now was fine and went over 3,000 RPM just fine. So now i am concerned, i just do not know how serious this is, or what it is, my thought was a fuel pump? or EGR issue? but i would have thought i would have got a check engine light or code? and how would it drive just fine after a restart? I am just so worried because i had a few jobs to do this weekend, and i need the truck and cannot get stuck over this. I tow over 20k lbs every day and am now quite worried. I just wanna know what can cause this to have not let me go over 2,500 RPM, keep in my my F450 has the 4:88 rear end, so on the highway it is at a higher RPM and this is why it really did not allow me to go over 65MPH. Now its ok, but again, i only drove it once since, so i am not sure if this will happen again or not...

Any help or thoughts are appreciated.


Thanks!

 

Egr deleted or just turned off?

 

Well I never touched or did anything with my EGR, i do not even know if it operates on the 210 Spartan tune?

 

I've had egr valve issues when they were there and it sounds like the exact same thing.

 

when is the last time you did the fuel filters?

 

1,500 miles ago. I change both at 7,500 miles.

 

When you took the HFCM apart a while ago did you make sure the new gasket was seated properly for the manifold? Just trying to think of things for you.

 

Thanks... Yes, it seated properly. The first time i took it apart i re used the old gasket and fuel was leaking very bad. I bought a new gasket and it all went well and seated just perfect.

 

Well, today i was towing 4 cars, and i got the same problem! could not go over 2,500 RPM! I finally got it to my destination. Dropped off the cars, restarted the truck and it was ok. On my way back to my trailer storage lot, i noticed a check engine light! I read the codes seems like just 2 of them P0087 and P0058 fuel rail pressure to high, then fuel rail pressure to low. I was on mostly streets so it was hard to feel the issue, but every so often you can feel a slight loss of power, but it comes back. Also, at idle, i think it sounds different. At one point my FRP PSI was over 6k at idle... What are your thoughts? is this an injector issue? and should i take my spartan off before i go to the dealer?

 

Volume control valve on the HPFP?

 

I just know already it will need a new HPFP along with a few other things!

 

I agree. Take the spartan off so the dealer can do the proper diagnostics.

 

Ahh there you are! I was wondering when you would see this thread. If i put the truck back to stock and put the stock tune that will clear my check engine light correct? I wanted them to see it. Because i am not sure how quck it would come back on

 

Well you can stop by and have them verify and check the code, but for proper diagnostics I'd recommend the stock flash be installed.

 

What tune are you running?