Can I trim about 1/8-3/16 off the od of my ebpv flapper, and it still hold my truck going downhill? I think it keeps getting caught on my dp. When I just tried my new chip, even in heavy tow my egts are rising fast. When I kick my ebpv in then out when I'm getting high egts sometimes they get better, sometimes they dont.

 

use a die grinder and take a lil off and see how it works after


maybe you will see marks in the soot in the down pipe to know where its hitting

 

As I see, you yous the EBPV as a exhaust brake, right? Why do you think it keeps getting caught on your DP?. And why do you kick the valve IN when driving (towing)?
I guess that the programming in the chip is not OK, IDK or the mechanism of the valve is working wrong, but not caugt for the DP IMHO. BTW What chip is it?

 

OP need to edit his FTE profile and make a signature with his mods