truck surges when cold?

[superduty12v]

i found a truck i want to buy not too far from me, its a pstroke 5 speed and its what ive been lookin for but, in the ad it says it surges when cold? what causes this and if i drive it like that what damage could it do? turbo issue? idk what it is, never had any of my trucks surge

 

[93turbo_animal]

the only thing I can think of off hand is maybe its the EBPV cycleling.

 

[superduty12v]

dont know what that is, kinda new with strokes.. only did injector work to em

 

[OLDBULL8]

Some people started calling PSD's from 94 on up.
What year PSD are you looking at?
There is several things that make them surge, gotta know what year.

 

[93turbo_animal]

Sorry Exhaust Back Pressure valve the computer uses this to speed up warm up when its cold by closing a valve raight at the back of the turbo to cause back pressure and keep the exhaust heat in. Theres a tube that goes to a sensor that measures the back pressure so the computer knowswhen its on and sometimes this tub can get clogged with soot and make the ebpv not work correctly. I been in trucks that cylce so much so fast that you'd swear it was missing. I do agree with old bull though as its hard enough to diagnose trucks over the internet let alone with very little info

 

[superduty12v]

lol i was sittin in the shop tryin to think of what ebpv could stand for and i got exhaust back pressure valve its amazing what a little thought could do and its a 95