Hi, I'm completly new to forums and for the most part diesels, I recently bought a 99 F350 with 130k and it has a noise that resembles an exhaust brake being stuck on at about 1600-1700 rpm. I upgraded the air intake (k&n complete air box kit) , new 4" exhaust (right off the turbo) and installed a evolution programer, slightly better but still a real backpresure noise. Any ideas??

 

Is the truck down on power when making this sound? Sound like a 747 taxi-ing around?

 

that would be the EBPV (exhaust back presure valve) it aids in warming a cold motor on cold mornings..is it cold there now? and does it only do this till she warms up?? if it does it all the time the steel tube could be pluged..in front of HPOP you will see the EBPS with a wire going to the top and a steel tube (looks like a brake line) coming out the bottom..that tube runs over to the passanger side exhaust manifold.(can be seen by looking in front of the front tire just above the frame rail)...take that tube off and check for cracks and pin holes..spray brake kleen and run a wire down through it to clean any soot build up...also clean the niple on tha manifold and on the bottom of the sensor as well..

 

Any loss of power?

Sounds like the EBPV valve is stuck, very common, the heat riser valve activated because of the cooler weather and probably jammed, like asked earlier, does this go away when the truck warms up.

 

thanks guys , yes it does it all the time, I'll check to see if that tubes plugged. I think the truck didn't see alot of mantenince before i bought it. When i geared it the diffs were half full water !!!

 

let us know how you make out...also i didnt see before and i am sorry..


welcome to FTE

 

Ron thats a great web page , i also have a early 99 (lots of mods) and upgrading the turbo is in the future

 

if your looking for SOP power..do the HPOP to 2000 pump..its a little bit bigger and push more fuel then our inj will handle..i had to do the turbo..mine bit the dust..i just up grade to the 99.5 turbo and just added the wicked wheel..i see less low end and tiny more high end but ..i see 100 to 150* less on the EGT's

 

HPOP to 2000 pump?? Sorry got lots of truck building experince but very little diesel knollege