The_Head

Hey guys,

I could use some ideas on what is going on with my new IP. I bought it from PDR.. is was built for max fuel, but is still a 12 mm H/R as far as I know. A local shop is installing it and reports the following problems:

1. Makes a huge amount of white smoke.. can't see truck parked 4 feet away.
2. Hard to start when warm, extremely hard to start when cold

Sounds like its fueling way to much to me. The shop thinks a plunger might be stuck? Could the fuel pin be stuck? I suggested they back out the full power screw at least 2 turns, maybe that might help. I'm going to call the PDR tech line to get idears from them as well, but I was also hoping another first gen guy might have some insight to what the problem is.

The_Head

Shop does not think the problem is air in the fuel. I guess the fuel filter was leaking pretty good before I brought the truck in, but I had it replaced. He should have done it.

unixcowboy

Keep us posted on how the pump performs....
You don't know the flow #'s do you ?

Richie O

Retarded timing?

jimbo486

if it were fueling too much, it would probably haze pretty good at an idle and smoke bad when driving when at normal operating temps. as you should know, black smoke is nothing but unburnt fuel. when it's white, that's usually an issue of unburnt fuel in a low combustion temperature situation or, as richie mentioned, the timing may be a bit retarded. but i've asked this before, wouldn't you know if the timing was retarded judging by how the motor runs? hard to start when warm and shop doesn't seem to think it's a air in fuel issue? i'd say try bleeding the air out anyway. try all the things that could be a possibility and that you know how to do yourself.

The_Head

From doing a search, I think it might be a KSB problem.

He tried retarding the timing and advancing the (static?) timing, but it didn't clear up the problem.

I'm about 500 miles away at the moment, so I can't really do anything yet.

I believe PDR said it was good for 300-350 cc's, but don't quote me on that.

Alec

I just re-read your post. The most important thing to check is that the lift pump is supplying at LEAST 3 psi of fuel to the injector pump. If the pump is sucking against a clogged or leaking filter with no supply from the lift pump, it could explain your symptoms entirely.

Now, back to more unlikely problems:

There are two problems that I have experienced that *might* be causing your problem.

1) Someone took the manual shut off lever off a pump that I re-sealed, and put it back on indexed in the wrong position.

2) The plug that is in the center of the injection lines on the back of the pump -- the one with the big three sided head -- was loose. (If the plug is loose, fuel can leak back into the pump body from the end of the piston, even if there is no external leak.)

The KSB makes a barely perceivable effect, even at quite cold temperatures, and has no effect at high rpms (unless your fuel supply is insufficient).

It is possible that the piston for the advance mechanism is stuck, but this is very unlikely. Insufficient fuel pressure and a stuck advance piston will make the engine behave similarly under low to moderate power.

Hope that helps a little.

Benjamin b2

the advance piston will stick more than most think, that wont alow it to advance the timing with the ksb and it will not alow the timing to advance when rpms get up. you might start with a new case presure regulator, jim lane made a good article on resealing it so you should be able to find it. the presure regulator is what controls the avance piston. my last pump had to have a sleave put in the advance piston because it pulled metal and was leaking internaly. ran just about like you described. just food for thought but id ask pdr if the put a new regulator in your pump.

The_Head

Thanks for the ideas. I will ask PDR about the pump has a new regulator. The lift pump has about 8,000 miles on it and should be good. I think it's a timing issue, but have to take a look when I get home.

Richie O

Do they have a timing tool at the shop? Did they frig up the order of the injection lines?

6speedcowboy

sounds like it may be a timing issue to me. if it was me i would find a more qualified shop to work on the truck.

The_Head

My brother mentioned to me that once upon a time he bought a beefed up VP44 for his truck and it smoked like a choo choo because it was burning some kind of test bench fluid that was still inside?

I wish I had other options for shops, but my town is very small.

wannadiesel

I'm with the folks who think the timing is way off.

The_Head

My brother also wanted to bet a bber that the timing was retarded a tooth. The guy insists he has installed many VE's though.

dillenger1

who built it?could be delivery valves or vane pump inside sticking.was it sitting long?