It's the ford in my sig.

The engine is out of a 96. It is really hard to start on a cold start. Like it billows white, gray smoke (fuel, probably related to the mods?) and I gotta give it lots of throttle and it will finally start. Also, even when it's warm while starting, I have to feather the throttle for it to actually start.

I'm not familiar with the p7100 pump and it's starting habits. My VE truck starts beautifully in any weather. It could be -35 and it would fire right away if I cycle the grids a couple times. Not so, with this truck.

Is it the timing? The timing is an unknown. I don't know where it's set. I bought the truck this way. Just wondering if the timing was way advanced, would it cause this? It almost reminds me of how the sled pullers chug the smoke while idling, but mine does it on startup. It hazes at idle but that's expected given the mods.

Also, it otherwise runs fine.

It does have a tick at the back of the motor, which I assumed was the piston pump because I know at idle they can make a ticking sound. I guess it could be the flexplate too but I'm sure it would have blown apart already seeing as how i've driven it. And hauled with it.


Thanks in advance.

 

Does it have grid heaters and have you been cycling them?
If the timing is above 17° you can expect hard starting.
Low fuel pressure to the injection pump can also cause problems.

 

yes, I cycle the grid heaters. They are run through relays and have a push button.

I suppose low fuel pressure could be a problem too seeing as how I have to feather the throttle to start it.

I assume rotating the IP towards the head advances timing like on the VE? I never checked to see if it was advanced that way. I wouldn't be surprised if it was bumped a tooth though.

 

You don't turn the IP like a VE, you have to reset the pump gear on the shaft. How does the truck run otherwise? I'd definitely have you timing checked out. You shouldn't have much of a haze with just 100hp injectors.

 

Once warm, it doesn't haze much. Just enough to see that it's there. It's just while cranking it over to start it, it really billows a lot.

It otherwise runs great too. It's got lots and lots of power. It's fast, even with the truck weighing 7k lbs.

 

Check the OFV pressure. Should be 20 to 30 psi.

Tom

 

What is the idle speed set to? A bump in the idle set point might help to get it started. But it won't help the smoke issues. My DDPs don't haze at all at warm idle. Cold the lope the engine on initial start but even out with light blue haze.

 

What's the OFV?

And Idle is about 750 in P and 700 in D

 

OFV= Over flow valve.. Its a pressure regulating valve on the injector pump to maintain a 15ish Psi inlet pressure to the rack.
http://www.genosgarage.com/prodinfo....17-413-101-KIT

 

or here> http://www.fostertruck.com/Overflow_valve.htm

 

oh, it should be good. The PO said he changed that out recently. It still looks pretty much brand new.

How do you actually check it anyway? Check it with a gauge to make sure it's regulating to 15PSI?

 

http://www.cumminsforum.com/forum/94...-12-valve.html

 

thank you.

 

We are having the same problem with ours. Check your relays that run your grid heater make sure they are working. The problem with ours is the PCM.

 

Probably not.
The PCM is almost indestructible, most people who replace them end up with two perfectly fine PCMs and a problem that didn't go away.
Problem is almost always a bad connection or wiring short.
Grid heater info> http://dodgeram.org/tech/dsl/trouble...niford_htr.htm