Not the hoss I had hoped for

[Towriggity]

I've got a 93 W350 CC dually auto, bhaf, straight pipe, no kill solenoid, pump cranked to collar, this thing does not pull as good as I suspected it would, won't hold seventy up hills, and when pulling my jeep on a gooseneck it was just flat pathetic, already did the obvious, fuel filter is new, 25 lb boost, piston lift pump, no leaks. Any other suggestions? I'm thinking it's just wore slap out, but hoping it's just something simple, thanks for any help in advance.

[Remps]

A torque converter will add a couple hundred ft lbs torque.What are your towing egts?

[Towriggity]

Also when revved at idle there is tons of white smoke and backfiring, but once in gear there is no studded, just a little black smoke

[Towriggity]

Has a pretty heavily built tranny and a new torque convertor, however there have been times that it could not move a load with it floored in 4 hi, load was about 20 k

[IowaCummins]

Bump your timing a 1/8" to get rid of that studdering revving. mine did that for ever till i figured out how to bump teh timing. also will help cold starts alot. i picked up some mileage also.

Make sure your getting full throttle. then do the little throttle linkage swap for more throttle travel. you move the ball joint to the hole closer to the pump and put your spring where the ball was. then check again for full throttle of the pedal.

Check for boost leaks.

Good free flowing exhaust always helps towing.

Air filter up to snuff?

[Towriggity]

Don't know egts, boost around 25, no funny smells, I highly doubt a torque convertor will add a couple hundred ftlb of torque, the truck just falls on it's face sometimes. New bhaf, fairly positive of no boost leaks, pretty good amount of blowby though I do not know how to measure, or how much is to much.

[Towriggity]

Timing bump is pushing it to the head right? or is that too much?

[peobryant]

Has a pretty heavily built tranny and a new torque convertor, however there have been times that it could not move a load with it floored in 4 hi, load was about 20 k

What kind of converter? If it has a brand new converter built to stock specs, it is still junk. A good converter will do a whole lot for your truck, and like Iowa said, you might want to try and bump the timing to get rid of the missing at idle.

[peobryant]

Timing bump is pushing it to the head right? or is that too much?

That is to much. I'd start with an 1/8" bump and work from there. I also highly suggest investing in an EGT and fuel pressure gauge, especially since you're towing and have above stock fueling.

[TWorline]

There is a little hard line that runs from your head to the top of the injection pump. Check this line and maker sure it is all together, this line supplies boost to the AFC diaphragm which controls the amount of fuel sent to the injectors for a given boost pressure. If this line is broken, it is about as sturdy as a tooth pick, your truck will be a dog.

[Towriggity]

That line is in tact, however the afc lever is soon to be Mia. Also the po of my truck messed with the timing so I really do not know where it is currently at, approximately how far from the head should the pump be? It's pretty far away right now which leads me to believe that maybe the timing is far too retarded and could be the cause of my lack of power as well as the white smoke. Thanks in advance for any help,

Jake

[Begle1]

A '93 with the power screw to the collar is pushing maybe 200 horses on a good day.

The white smoke when revved at idle (while warm I assume) is special. I've never seen that before, I guess I could believe these guys that it's a timing issue. Maybe your pop pressures have magically tightened themselves? They usually go the other way and lower/ advance with age...

[1STGENFARMBOY]

If they didn't skip a tooth, whitch i dought cause it a little more involved that just
movin the pump, there should be a hash mark or a line cast in the pump flange where it mounts to the cover
at 9:00 oclock that are lined up with stock timming, when they say 1/8 in bump
that means move clockwise 1/8 in from the mark on the cover,


Dar

[Richie O]

If they didn't skip a tooth, whitch i dought cause it a little more involved that just
movin the pump, there should be a hash mark or a line cast in the pump flange where it mounts to the cover
at 9:00 oclock that are lined up with stock timming, when they say 1/8 in bump
that means move clockwise 1/8 in from the mark on the cover,


Dar

I a perfect world yes. The only thing is wether or not that is the pump that came on the truck or one that has just been thrown on and never timed correctly with new hash marks scribed.

[Begle1]

The most suspect thing on installation would be a sheared timing key. A timing key that's just slightly deformed can cause several degrees of timing change.

I've done it a couple times.