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Apr 22, 2009 | 04:52 AM

#16

Jim Lane

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From: Southern California

Quote:

Originally Posted by schamran

Before you tear your pump apart, I'll tell you what I did when my truck lost power. Take the intake/exhaust off of the turbo, and find two plumbers caps to clamp over them. Put a valve stem in one of them, and fill your entire motor with about 40 psi of compressed air. Use a spray bottle filled with water and dish soap to spray all over any fittings from turbo to intercooler, intercooler to intake, etc. On my truck a lot of stuff needed to be tightened up, and we did the same thing with just the intercooler to verify that it was shot.

Hope this may help.

No intercooler on my truck, only my 3" crossover from the turbo outlet to the top of the grid heater, I checked all of the boots for leaks.

I pulled the air filter and checked for restrictions, I was hoping to see a small animal that got sucked into my Ram Air scoop, would have been too easy.

Apr 22, 2009 | 05:06 AM

#17

Jim Lane

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From: Southern California

Quote:

Originally Posted by Crossy's son

I was thinking the lift pump too...

I was also thinking this, I didn't think about the case pressure and the timing. Since I have a lifetime warranty on the pump so I will get another one and see what happens.

It just seems like I am getting full fuel right off idle, before I could leave the stop light with my foot to the floor and I would only leave a haze, now it is a soot cloud, same if I try to build some boost it will be billowing clouds of black smoke from my exhaust.

It kind of ruins the effect of being a sleeper.
Jim

Apr 22, 2009 | 05:40 AM

#18

Jim Lane

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From: Southern California

Quote:

Originally Posted by wannadiesel

Smoke screw all the way out. You want the fuel pin to ride as high as possible in the bore without the little side pin catching in the groove at the bottom. This will require some grinding or machining on the inside of the AFC cover. Set the star wheel as high as you can without running into coil bind. If you get coil bind it ill keep the fuel pin from going all the way down and cost you power.
I think it's possible your fuel pin is stuck down.

Just short of coil bind will I still have enough boost pressure to push the fuel pin to full fuel?

Can you think of any internal part of the pump if malfunctioning that might cause it to deliver more fuel?

Is the control collar the only part that governs how much fuel is delivered, no enrichment circuits?

Could the KSB cause it to smoke?

How about if I disconnect the boost line to the AFC would I eliminate the fuel pin and its components from the equation then could it still get too much fuel from somewhere else, would a blocked restrictor cause it to smoke from too high case pressure?

Jim

Apr 22, 2009 | 11:25 AM

#19

apwatson50

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From: Golden, Colorado

Quote:

Originally Posted by Jim Lane

Just short of coil bind will I still have enough boost pressure to push the fuel pin to full fuel?Yes for sure

Can you think of any internal part of the pump if malfunctioning that might cause it to deliver more fuel? no

Is the control collar the only part that governs how much fuel is delivered, no enrichment circuits? control collar does it all, so its all in the governor assembly, no enrichment circuits

Could the KSB cause it to smoke? Not like its doing to you

How about if I disconnect the boost line to the AFC would I eliminate the fuel pin and its components from the equation then could it still get too much fuel from somewhere else, would a blocked restrictor cause it to smoke from too high case pressure? disconnecting the line would eliminate the pin, blocked restrictor would cause excessive case pressure, overheating the pump while having advanced timing all the time

Jim

See answers in red above. With advanced timing at lower rpms you'll find that turbo spool is slower than with retarded timing, but once the turbo spools the advanced timing will help out the top end.

Apr 22, 2009 | 11:50 AM

#20

ppiggppenn

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From: MyTrailer, Canada

Re your speedo suddenly quitting, could be just the wire off your VSS, up underneath the drivers side. Or one of the two screw/cap connections working loose. My speedo became intermittent, quitting occasionally, but replacing the VSS fixed it. My tach has never failed during all my speedo issues. I'm currently looking for a new ratio gear (between VSS and tranny speedo output). I'll stay out of the smoke issue as there's better talent than me on it already, ... Dennis

Apr 22, 2009 | 02:50 PM

#21

ofcmarc

DTR's "Cooler than ice cubes 14 miles North of North Pole" member

Joined: Oct 2006

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From: 14mi North of North Pole

Quote:

Originally Posted by Jim Lane

The pin that rides on the cone is sticking.

If this pin stuck in the full fuel position, there's your answer. full fuel at idle and just off idle= smoke cloud before boost.....

Apr 23, 2009 | 12:16 AM

#22

hardheaded

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Joined: Feb 2008

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From: beaumont, tx

i am having the same problems as jim lane... ive spent 220 dollars and had my truck at two shops and still cant find an answer. this has been going on for about a month now, and i am getting terrible fuel mileage, 10 mpg.
some thing that may be relevant to this matter is the fact that my throttle got stuck in position going down the highway a few times the other day, it came loose when i popped the throttle real quick, but what if it didnt