93 dually

ok guys my ive been reading the forums alot and everyone boost levels are alot higher than my truck has ever got ive got a htt stage three turbo high flow intake straight4in exhaust 16cm exhaust housing and from what ive been told buy the old owner of the truck 25 hp injectors my truck with my foot to the floor gets at its max 25psi and thats on a good day ive checked my innercooler hoses and they seem fine any help would be very cool

G1625S

Are you seeing any smoke under full load? If not, and you're sure there are no boost leaks, then it sounds like it's time for more fuel...if you want more boost. Really, 25psi is about the sweet spot for that turbo anyway.

flashgordon

if you have a pyro,... to keep a i on the heat then i would say the you need more FUEL!
time to turn turn the pump up!

93 dually

somtimes it smokes somtimes it doesnt should your boost stay steady at full load or bleed off

93 dually

plus the full power screw wont go in past a turn and a half timmings bummed 1/4 on the pump

G1625S

Boost will come down as you approach the governor. An original stock (read-old and tired) governor spring will only pour all the coals to about 2100 rpms before it starts defueling. Also, if your lift pump is weak, the injection pump will start to starve at high rpm/load, which will also cause boost to fall off.

93 dually

looks like it is the stock lift pump on my truck the injector pump was replaced before i bought the truck could that explain why it smokes somtimes and dosent others

goodtyms

If the small follower pin that rides on the larger fuel pin is sticking, you may not be getting fuel consistantly. I fixed mine and promptly pegged my 35 PSI boost gauge on the first run out.

xtremexj

That's what I have to check tonight also. I only get a light grey cloud when I stand on it so I think my problem is also fuel not a boost leak. Guess we'll know in about 8 hours - come on 5 o'clock!

What can you use to spray into that pin to keep it from sticking if that's the problem?

goodtyms

Unfortunately for me, it wasn't as simple as spraying lube on the pin like some guys have done. I had to pull the whole pump top off, drive the shaft that the follower lever (the one that you can push on via the access plug on the front of the pump) rides on, remove the lever, remove the follower pin, clean the seal out and lube it with dilectric grease.

It took a while to get the guts uo to drive the shaft out, but there's a ball bearing on each side of the shaft that's used to retain it, so it's not as difficult once you get things moving.

You might get lucky and be able to lube the pin from inside the AFC housing, otherwise you get to dig a little deeper.

93 dually

hey man thanks for the info ill try that as i remember the afc pin was a pain to get out took a few pulls to get it out it just didnt pop out i cleaned everything installed the afc pin back in and had no boost at all so i putt the peddal to the floor and boost jumped back up scared the crap out of me

goodtyms

Good deal!