He was asking about the EBPV and the wastegate.The EBPV would have more to do with high EGT's if closed.
Nut

 

That's true, but the ECU would not command enough fuel to make a lot of smoke.

Unless the fuel map is more than stock, I imagine.

 

I don't see where he mentioned about smoke. I am interested in what it takes to fix this as I had my EBPV stuck 3/4 closed a while back and my truck acted very similar. I didn't have any way to check egt's at the time and only had small amouts of white smoke at idle.

 

I really haven't noticed any smoke issues, white or black, just the increased EGT and slow on them coming down and possibly a slight power loss at low RPM's in OD. The turbo seems to be putting out normal boost numbers under normal conditions, but may be working a touch harder in OD at low RPM's. I am thinking this is to compensate for the lack of power because the exhaust is restricted a bit. To be honest, I am not sure if it is the wastegate or the EBPV. Seems you could justify both for a potential problem. The EBPV would impede exhaust gas from exiting which would increase the EGT and create some back pressure which is limiting the power somewhat. The wastegate could also be restricting the flow and making the turbo work a touch harder by limiting the flow. The one thing I did notice is that if you are in OD at low RPM's the temp goes to 1200 or higher in short order. When you let off it comes down very slowly, but if you take it out of OD the temps drop to 900 very quickly but not below. Prior to this problem, 900 out of OD is still higher than normal. It seems the increased RPM's are forcing the exhaust gas out better, but still not free flowing enough to come back to normal range. Thoughts anyone???

 

By the way, my truck has a flipchip, but I always use it on the tow setting. I don't recall the last time I used the higher side of the chip.

 

Jerrod what do you have for an exhaust system?

 

Morning Kwik,
3.5" downpipe, 4" alumidized exhaust that has been on since like 10K miles, soi there is 150-160K on the exhaust. I believe it is BD brand if I recall form 4-5 years ago. Was potentially thinking if the muffler has a restriction in it someplace from it breaking down over the years?? Maybe a baffle rusted out and got lodged someplace?? I am really at a loss on this one. Seems all I can figure is it is on the exhaust side.

 

You may want to remove the chip and try it. Your chip may have a fault in it.

 

A fault in the chip after 4 years??? I guess anything is possible at 168K on the ticker. Seems to be more of a mechanical problem though since when it is not under load the conditions are present, but less. At first I thought the temp probe may be bad, but at start up or extended idle it still reads as it did prior to this problem. Also kicking it out of OD seems to drop the temps which would lead me towards a mechanical problem. The problem is I am always on the road with the trailer when it is most present! No rolling shop here unfortunately.

 

Or do a battery power cycle/reset by disconnecting them for a few minutes and then reconnecting.
Nut

 

Certainly will try removing chip and/or disconnecting power. Unfortunately I have had the chip for 4-5 years so I have no idea what numbers would run on this truck without the chip. Maybe I will try the power test first since I can still compare numbers to previous numbers. You all don't feel like it is a "mechanical" problem??

 

Just shooting out some ideas to try. Obviously easier to have the truck right in front of us.

 

I think this picture of Kwiks show the EBPV in the open postition. You can look at yours and that may help with that. As far a the muffler being clogged that is a possibililty. You could do a muffler delete. You should like the sound and that would eliminate another factor.

 

Fair enough about having the truck right in front of you. Point taken. I hate issues like this since I am always out on the road when it occurs. With 168K anyhting is a possiblity whcih kinda stinks. Thought the muffle was a potential option, have ot see what I can do about getting a delete or putting a new walker big truck on it. I have a strange feeling that it is going to be tough to find since it is not an overly pronounced problem all the time under all conditions. That is what leaning me towards the EBPV or wastegate being stuck just a few degrees from totally open??

 

If your exhaust had a high restriction it would cause low power and poor response. High exhaust temp is caused mostly by a large boost leak.Check your ATAAC hoses and clamps,if you can pressure test the ataac as well.Engine timing is also a factor but not in the this case or you would have the warning light on etc.