2000 F350 7.3 Low Boost When Cold

[bmx0964]

This is pertaining to the truck in my sig - see my sig for mods and specs.

Whenever the truck is cold I cannot make boost. It seems as though the waste gate is open. You can hear what I would call a whooshing noise out the exhaust (cant hear any engine noise out of exhaust just sounds like a massive amount of air coming out the pipes). It will do this constantly until it reach almost operating temp. From that point until it reaches operating temp it will do it on and off... basically like an A/C compressor going on and off. If I try to drive the truck before it reaches operating temp I will make zero boost... but if I go to WOP (wide open throttle) it will come out of it, and when it does its instantly at about 20-23 psi and the truck just takes off like a bat out of hell. After the truck gets to operating temp it runs great no problems.

The only issues with the truck that I know of right now is that the intake air heater is bad and unhooked (it is still installed its just bad) and the injector in cyl 8 is leaking (not sure if its fuel or oil leaking but it failed an injector balance test on a solus).

Any help would be greatly appreciated!

Thanks in advance guys.

[bmx0964]

Any ideas????

[dereku]

Thats your exhaust back pressure valve best thing to do is delete it.

[dereku]

Oh and just delete your air intake heater. Mine has been gone for 2 years no issues.

PM me if you have any ?s

[bmx0964]

Thanks for the info!!!

I just spent some time digging to find out how to remove and plug the EBPV and I found a pretty good write-up. Anyways I also found someone that said you can stop having the PCM control it and turn it into an exhaust brake, anyone heard of this?

As far as the intake air heater goes would just a pipe plug work in its spot?

Thanks again!

[dereku]

Sent you another PM

[EVH5150]

I just spent some time digging to find out how to remove and plug the EBPV and I found a pretty good write-up. Anyways I also found someone that said you can stop having the PCM control it and turn it into an exhaust brake, anyone heard of this?

I would like to know the answer also!

[bmx0964]

You can disconnect the EBPV and hook it up to a switch and manually open and close it, thus making it an exhaust brake. But if your in my situation the problem is my EPBV is sticking so I would need to replace it before I could make a good usable exhaust brake. I think I am going to just go with removal and plugging of the EPBV.

[dereku]

Good call. I have a stock one laying around if you want it. So you can gut it and have it ready so you dont have a down truck for a few days if you happen to make a mistake. PM me man. I dont want it just pay shipping.