I installed my 3200 sping this weekend and decided to turn my fuel screw in a bit more and found out that 1/2 turn bottomed it out (the collar is long gone, it is bottomed on the landing on the pin itself where the o-ring is). Is it normal that this screw can be turned in that far without runaway? Does this mean that my pump is on its last legs? I have to watch my egts a little, but really only when I am towing, in which case my tranny temp slows me down first. When unloaded the speed limit stops my left foot before egts. It runs great, especially with the 366 spring.

My question is whether this is a sign of a worn out pump, or a sign that it is time to get bigger injectors (after a better torque converter to keep the darn tranny temp in control)?

Thanks for your advice in advance!

 

Id think if was on the way out you would see other signs, altho iv never seen one there are some trucks that dont react well to screw being turned in, they just dont give improvement most do. Im sure wanna or another will chime in as well.

 

I bought a new pump a few years ago and doctored it before it went in, and I worked my screw all the way in (with a board ready) and it never came close to running away. I don't think my pump is bad, I'm pushing 35psi with POD's.

 

I think running away,has to do with how well the pump is cowlibrated for fuel flow an rmp's. I belive a pump that dose not run away when the screw is bottomed is a well cowlibrated pump. Scheid offers cowlibrations for the ve and p pump's cost's $400.00 for a ve and more for a p pump. Makes your engine a hole different beast.

 

Mine's bottomed out too, and I'm seeing 32psi and around 1400*. Some pumps just don't react as well to fuel screw turns as others. I tried Scheids to see if they had a screw with more threads beyond the o-ring, but they said they didn't. I guess that just means time for a tranny and injectors.

 

Thanks for the replies. Gman, it sounds like we are in the same ball park, I see about 27 pounds of boost but that is at 7600 feet above sea level. It sounds like it is time to turn my attention to the tranny so that I can make use of more of the power.

 

highcountry
One other thing you may try and I use it all the time when I go to the drags to lower or raise my dial in times.

On the side of the pump right above the maual shut down there is a scew that looks just like the idle set screw but it limits the WOT.

Its about 2.5 inches long and has two 10mm jam nuts on it. It sits horizontal on the pump as your looking at it from the fender side.

If you are at 26PSI turn the screw counter clockwise 1-2 turns after you loosen the stop nuts.

Snug the jam nuts.

At this point have some one get in the truck with the engine off and have them press the pedal all the way to the floor and make sure it travels all the way back and hits the stop.

After you confirm this happens take the truck for a drive.

I adjust this all the time. I know my truck can run a low 15 in the 1/4 mile but its hard on my stock tranny doing that all the time.

I de-tune my truck by turning this rod in about 4 turns all the time to reduce my 1/4 mile to 18-19 in the 1/4 mile.

It also makes it harder for the fast guys to judge there dial in times at the end of the track.

I really think this is why so many do not get there full throttle use out of the pump. I was shocked to see my EGT go past 1,300 for the first time after making small adjustments.

After that and getting full travel out of my pump throttle I started backing the full fuel screw back out to control temps..

Lance