Compression Ignition Addict
Join Date: Apr 2012
Location: Stratford, Ontario
Thanked 136 Times in 120 Posts
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Oh I found that out, I can actually hit 20 PSI now if I give it a bit on the highway, before was only 10 no matter what.
On a note directed at you, this truck has an F5 tuner that has a weird way of running. I did some searching and found 1 other guy with the same symptoms, a different person from DP told him that it was more than likely the tuner was not set for the correct PCM code. That wouldn't surprise me as the original purchaser of the tuner, is not a previous owner of the truck.
I'm going to have to bite the bullet and get the truck scanned at Ford as there is a sticker talking about a reflash to a different PCM code that I cant make out, and hell with everything else, there's no guarantee that the PCM in the truck now is the original. But once I get the correct code is it simple enough to get the chip reburned just for the new code, and possibly another tune added?
Symptoms I get ( identical to one other guy):
Injector knock ( I am an early 99 its always there, but louder with the tuner)
Chopping way of running on deceleration. When the torque converter unlocks on its way down the thing sounds like its going to stall, never does though, all tunes do this.
I also think it needs some work on shifting.