PCM 97-F350 spent $3000.00

[HUSKER POWER]

So I cant give up, I called the dealer for a price on a new PCM for my truck it is $450.00, they told me that I have to copy my truck info from the old one to the new one,my question is, if I copy to the new one will it copy the problem to ???? nobody can figure it out,6-8 mpg one day it will run good the next it runs crappy, REBUILT INJECTORS-VALVE COVER GASKETS-WIRE HARNESSES UNDER V-Cs wire harnesses-OIL CHANGE-FILTERS-IDM-DELETE CAT CONV-FUEL PRESSURE 70 lbs-COMPRESSION TEST 380lbs ALL CYL I spoke with the diesel shop today and he thinks thier may be a short in the wire loom too, and affecting the voltage to the injectors. It is so wierd one day it will run like a raped ape, the next day it just runs.Does any one think I should change the harness first?????

[badazzstroker]

call dp tuner and get a pcm from them already tuned and ready to go i think they have one for a 97 i know they have one for a 99 cheaper than that to

[craig long]

no, the old info will not affect the new one. i am not saying yes, the pcm is your problem. i am saying the code that belongs to your pcm does not cause your problems.
there are 26 pcms for my year and motor and without the right one copied to the new one it will have problems.
if your pcm is the problem it is probably something with the hardware and not with the software, so to speak.

[lamarmathis]

well my 2 cents is if you want to replace the pcm go with a used one,it will be the cheapest way,but i doubt that will resolve any of your [poblems,use car-part.com and search for a pcm,u need to get the code off yours first and u can search a specific area ie nebraska or where ever

[cfunderb]

You sure it's not your exhaust back pressure valve causing the problem? When that sucker comes on your fuel mileage blows.

[Marty]

Originally Posted by badazzstroker

call dp tuner and get a pcm from them already tuned and ready to go i think they have one for a 97 i know they have one for a 99 cheaper than that to

Agreed ...........

[HUSKER POWER]

not sure what and were the back pressure valve is ?

[Marty]

Its on the exhaust side of the turbo where it meets the downpipe.

There is a rod that goes out from the pedistal to the EBPV and it can be taken off.

Here is a video of what the EBPV sounds like when activating.

What the Exhaust Back Pressure Valve sounds like when activating.

[HUSKER POWER]

I had them disconnect it because it is sticking now it is open all the time.

[special_ed1977]

i would check the waste gate. its on the turbine half