Excellent write up Dad98.5, I'm doin the copper tubing experiment later today..
I've heard of some guys not using the isolater but runnin a needle valve off the VP and just cracking it open a bit to sense pressure and of course if theres a fuel leak in the cab they just shut it down, still wont help the not sealing up at the guage issue we have been dealing with :fist:
I'll post up results later
__________________
Dan - Ontario Cummins Crew President
Ontario Chapter
GONE but never forgotten 
- 2001.5 24V QC SLT Laramie 2wd 47RE/3.55, LB, ICEBOX w/4510, FBD 4" turbo back w 5x18 SS tip, silencer ring MIA, FASS 150, IIS HRVP, DiPricol 30 psi FP guage, 1 qt 2 stroke EVERY tank!!
16.5481 @83.29mph on 7/7/07
My new ride .... for now - 06 JEEP LIBERTY CRD. NO MODS, its a lease...