hertz

I don't get over 26psi of boost. I recently got new injectors bully +50hp gained 3psi. My sign tells what I have. Everything on the intake has been replaced last year. Head has been rebuilt. I think I should be seeing well over 35psi. Intercooler doesn't leak checked that already new hoses on it. I was thinking about the wastegate being stuck open. Would this be a common problem. I am open to any suggestions. Other then this boost problem the truck runs great! even with only 26psi.

wannadiesel

The stock wastegate controller ought to open at 25 psi. You need a boost elbow (basically a calibrated leak in the wastegate hose) to get more boost. You can buy a boost elbow or make your own, obviously making one requires some trial and error. If you want to make one, get an 1/8 npt tee , an allen head pipe plug, and two hose barbs. Put the tee in line in the wastegate hose, drill a small hole (0.060" or so) in the pipe plug and put that in the third port. If you have enough boost I guessed right. If you don't - make the hole bigger. If you have too much, get a new pipe plug and drill a smaller hole this time.

hertz

I have the wastegate line pinched with visegrips hoping to get more boost. No luck though.

wannadiesel

Hmmm... EGT's OK? You may not have enough fuel to make more boost. That could be due to a stuck fuel enrichment pin (the little pin that rides on the fuel pin). Or you just might need more fuel Time for the power pin and 3200 RPM spring.

If it's running hot and you've leak checked the whole intake system, you could try disconnecting the wastegate rod and wiring the flapper shut temporarily to see if the actuator is misadjusted and keeping the wastegate partly open.

hertz

EGT are good normal. The pump was rebuilt last year, I will have to check the enrichment pin. You really think I might need more fuel. If that's the case this thing is a pig. I know about the fuel pin and spring wallet has been kind of empty lately.

wannadiesel

If the EGT is good you need more fuel to get more boost.

hertz

This truck is a diesel hog. I might order the fuel pin on monday. Leaving for Fl. on Thursday night or Friday morning. gota get it before then. Could you describe the enrichment pin. I was looking at Dave Fritz's web page to see if I could find it (enrichment pin).

wannadiesel

The fuel enrichment pin is the little pin that rides against the cone on the fuel pin. With the fuel pin out, you should be able to make the fuel enrichment pin pop out by cycling the throttle lever.

hertz

Oh ok it would be at the bottom went I pull out the fuel pin. Just open the throttle and I sould see it pop out. Sound easy enough

hertz

I just checked it (Enrichment pin). It moves freely. Thanks for the help Dave. I can't belive this truck needs more fuel. I still have post turbo pyro at 26lbs of boost it's right around 700*. When I am climbing the mountains I have to watch the EGTs thats normal though. Dave what you are telling me I have to call F1 to get different injectors. This truck will be insane by the time I get done with moding it.

edwinsmith

As I understand it, pump adjustments for fuel won't affect the mileage at cruise because it only uses enough fuel to keep moving.

Edwin

hertz

It just amazes me how much fuel can be put to these trucks. MPG depends on if you wear lead shoes when you drive too.

edwinsmith

Like that car commercial where the guy had a lead foot.

Redleg

Wondering if your getting full use of the throttle. If your cable was new, when you built your truck it may have stretched. Might be able to back down the smoke screw since you have a turbo upgrade. In case your foot's a little heavy on the launch. Did you get your injectors new or used? Just thinking out loud....

hertz

Injectors are new. The cable is orginal. What will backing out on the smoke screw besides lowering the smoke anything else? Yeah I'm getting full throttle I checked that a little while ago.