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by **Ezra** » Mon Dec 22, 2008 7:26 pm

I have a s300 62/71/14..6x.016's,a piston lift-pump.brand new intercooler boots.and Im only hitting 20-25psi of boost.My pyro only goes up to 1200f..Whats the reason for low boost?

by **bgilbert** » Mon Dec 22, 2008 7:37 pm

Any pump mods? If not, there you go, stock truck. If you don't have any boost leaks, a good thing to check is to see if the fuel pin is actually popping out and riding against the fuel eccentric cone. Easy things, like full throttle travel, fuel filter, boost leaks and fuel pin operation.

by **Richie O** » Mon Dec 22, 2008 7:42 pm

Ezra, you still have not figured that out? That thing will rip when you get it strait.

by **1991cummins** » Mon Dec 22, 2008 9:58 pm

yah, I bet it is something simple you have overlooked, if you have the pump turned up, check to make sure you have full throttle linkage travel, goodfilter, and your fuel pin inside your afc is moving freely

by **Ezra** » Tue Dec 23, 2008 5:52 pm

Yeah...well the mechanic.told me today that I have a headgasket leak. :mad:

..My only question is,my truck starts first crank and doesnt blow obnoxious amounts of white smoke.Is it a head gasket? Filter is new,throttle linkage is new.etc etc.Ezra

by **Ezra** » Tue Dec 23, 2008 5:53 pm

Yeah...well the mechanic.told me today that I have a headgasket leak. :mad:

..My only question is,my truck starts first crank and doesnt blow obnoxious amounts of white smoke.Is it a head gasket? Filter is new,throttle linkage is new.etc etc.Ezra

by **KTA** » Tue Dec 23, 2008 7:01 pm

Are you losing any oil or coolant? Or do you have any mixing between the two. If not it is most likely not a blown headgasket from what you say. low boost and no heat sounds like no fuel to me for some reason.

by **PToombs** » Tue Dec 23, 2008 7:30 pm

If it's leaking off the front corner by the thermostat housing, that's a common spot. It's a 1st gen marking it's territory thing.

Just keep the coolant full and run it!

by **Ezra** » Tue Dec 23, 2008 8:40 pm

Im leaking coolant,but not a drop of oil.They do not seem to be mixing.All the coolant leaks on the front axle on the passanger side.Ezra

by **skilletky** » Tue Dec 23, 2008 8:55 pm

i had the same problem with no boost a while back. i had pulled my afc pin out to grind on it. when i put it back in, the other small pin in the pump top got stuck, so it was not fueling all the way. i just had to pull the top off and push it back out. also check the afc boost supplytube from the head to the pump top. i left mine off once and it had the same affect as when the pin got stuck.

by **Ezra** » Tue Dec 23, 2008 9:44 pm

Im also getting alot of black smoke before the turbo lights,and the turbo is rather laggy.

by **skilletky** » Tue Dec 23, 2008 10:57 pm

possible turbo air inlet restriction? have you fooled with the waste gate on the turbo?

by **Ezra** » Wed Dec 24, 2008 5:21 pm

Well after i drove it today this is what it looks like.How bad is it? there is still no oil/coolant mixture.Ezra

by **PToombs** » Wed Dec 24, 2008 6:48 pm

Yup, that's the spot. Alot of these trucks seep there. You won't get any in the oil from there, it's just an external leak. Some guys go and get the head milled and replace the gasket, and 2 years later it starts seeping again.
Just get a torque wrench, set it to 125 ft lbs, and hit the bolts near the corner. I did mine with a breaker bar a little, and it was enough to get it to stop.

by **Ezra** » Wed Dec 24, 2008 7:38 pm

I think you saved my christmas Pete.lol.I got take my truck 1300 miles home ,the day after christmas.So I need the truck.So you dont think I should be worried about it?

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