losing boost

stacks04

Member
Nov 16, 2007
792
0
16
Terryville,Ct
hey gents, i have finally given my dsp setup to a freind of mine. it took me a while to be confident enough to put my tunes in somebody elses truck. it has been in for about 3 weeks now and has been fine. also has been in my truck since the begining stage of this year. no issues on the tow or milage tune. well this morning my phone rang at 6:30 he was towing to new hampshire for the race and in the tow tune he went to pass someone and he said the boost gauge went south right to 0psi and ton of black smoke. then pulled over checked things out to no avail. started it up took off and it ran fine. he then went to the milage tune and was good but it happened again. this time he just let off the throttle and back on it and all was fine. any thoughts. at first i thought he just blew open the egr valve because i know the tow tune has some boost, but the tow tune has minimal boost. sorry for the long post:(
 

sweetdiesel

That's better
Aug 6, 2006
10,390
0
0
52
Thailand
Possible that something with the vain posistion sensor? or the vanes them self?
is the pcv reroughted or a small bird stuck in the turbo:eek::D

Dunno just a geuss
 

stacks04

Member
Nov 16, 2007
792
0
16
Terryville,Ct
pcv is stock, not sure on the codes. he is up in nh now and i go up sunday so i will check then. just weird how it dumps all pressure and then builds right back up.