Fuel response issues

[Rio_Grande]

I posted this in another section thought it may get some traffic over here. It also dawned on me that this could be a TPS but why only at higher RPM's?

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When I get up to speed i loose the ability to speed up unless I push on the fuel hard enough to make it down shift. When it does then it jumps as if I had throttled up but I have that huge dead spot where i push on the peddle and nothing happens. After I step down and get it to shift then the control returns to normal until I cruise for a bit.

I have a recent post where the truck went down and they replaced the injector controler and the fuel pump. When they did that they upgraded the software and flashed my ecm. I have a Sniper 40 hp chip in the truck that has a secondary feature of a high idle switch.

What I am wondering is the chip made for older software and interfearing with the new set up.

Any guidance will be appriciated.

[Rio_Grande]

Help Still same problem no solution yet.

[Vdryv]

Sounds like fuel pump

[Rio_Grande]

That stinks, They just put a new one in. It acts to me like a sensor, maybee throttle position sensor?

[Vdryv]

Could maybe throttle pos if u have new pump but hard to tell if no gauge for fuel

[audiocontr]

Whats your fuel pressure?

What!? You dont have a fuel pressure gauge so you dont know? c'mon man! Install a fuel pressure gauge!! Every super duty should have one. Even if its the cheap $50 versions that mount onto your alternator.

[Rio_Grande]

I don't have a fuel pressure gauge, really I just want to get it running normal I really don't want or need a long list of modifications in my signature. Guess I am back to the dealer on Monday.

[audiocontr]

In no way is a fuel pressure gauge deserving of a line item in a signature. EVERY super duty should have had one from the factory and i have no idea why Ford didnt do it. Its incredibly beneficial for the longevity of your truck as well as trouble shooting. I wish i would have had one immediately upon inspection of my truck and at $50, its a bargain. You will spend more than that for the dealer to simply open the hood.

[Rio_Grande]

There are lots of little things I think ford should have added to help the owner of these trucks.

The fuel response issue worked it's self out. The truck acts like normal today. We will see how long it lasts.