Engine/Transmission (1998.5 - 2002) HELP with DD UFM problem

[tcourse]

Installed UFM Saturday and everything seemed fine. When I was able to get my foot in it I found otherwise. Any Setting above Level 1(same as EZ I took off) I get surging(Like I'm in and out of the throttle quickly, but not quite as fast as an ignition miss. Sets the check engine light and code. Installed it at NW Bombers party so I had help. Code was cleared before I left and came back as soon as I got into it hard 3/5. Tried dielectric grease but didn't help. Code was for communication with injection pump(don't recall the #, Radar do you remember?)

Also used Blue Chip pump cover.

Anybody have any ideas? I'll do a search but know I'll have a lot of posts to look at.



Thanks for any help.



Terry

 

[KatDiesel]

What connection did you make with the cover and the UFM?

 

[TomGolden]

hmmmmm... . this one sounds really



I had a problem that sounded sort of similar to yours, although it was after my drag Comp had been in for at least a full year. When going to full WOT acceleration, after about 2 - 4 seconds of hard pulling, everything just shutdown. Did dielectric grease, called Edge and had them send me a new Comp to try, replaced the MAP sensor,..... no changes.



Finally, at the suggestion of a buddy, I checked my wastegate on my HX40. Bingo! It was somehow hosed, and so at about 18 PSI of boost, the wastegate was opening and instantly no more boost, no more go..... So, I disconnected the rubber wastegate actuation line, put a 1/8" plug in the turbo, and no more problem.



Your situation is very likely related to the UFM - either a loose wire in the wiring harness, possibly a malfunction in the UFM itself, or one of the connectors just isn't seating properly. I would suggest that if you know of anyone in your area that has a Comp or UFM, ask if you can borrow it just for 10 minutes to try it in your truck. That should eliminate the actual box as the problem, and will be quick and easiest to try. If you don't have someone to borrow form, call Edge and ask if they'll send you a loaner to try. Aaron and all the Edge folks are fantastic people!!



Tom

 

[Bob Wagner]

you can switch with Big Russ has the same box and its workin great



That will be quick and easy

 

[tcourse]

Another reason I frequent this site

The member I purchased the UFM from saw this post and emailed me offering to help any way he could. I also appreciate the responses to this post.

Kat, I did not hook the ground to the cover .



Tom, excellent advice, I'll find someone with a Comp or UFM and try it



Bob, I'm sure I've met Big Russ, but not sure where he's located.

Like Tom said it could be a Comp or UFM.



Thanks all,



Terry

 

[Bob Wagner]

Terry, Russ comes to Auburn 5 days a week or we could try my comp which may have a small timing difference.



I could swing by tomorrow



Bob



Its the same plug on the back of the box

 

[tcourse]

Thanks Bob

I sent you a PM.



Terry

 

[tcourse]

Go figure

I had to take the little woman to the mall this morning and took the truck. No check engine light(had about 10 start and drive cycles since Saturday. Since I had about about a 8 or 10 mile drive up I-5, I took advantage of it. It was pedal to the floor in all levels most of the way to the mall. Made my day . Except for the beatings I took every time I floored it .

So everything seems to be fine now. Except the the empty tank. Glad the company buys my fuel. I did nothing but drive the truck so I don't know what the problem was.



Thanks to those who responded. I'll let you know if anything changes. Oh yeah, It's a scream. Now I want even moreOo.



TC

 

[pnwradar]

The codes set were P1693 and P0237.



We used a crimp connector on the end of the Comp pump wire, and connected that to the cover connection. Ground wire went to the intake bolt with the ground wire to the block.



Did the surging at ~2500rpm go away, as well?



-jon-

 

[TomGolden]

When I was trying to diagnose my problem, I decided to commit myself 100%, and I soldered the darn pump wire on my VP44. Warranty... ??? it's only $$$$$$$$$ :{



Fortunately, my VP44 seems not to have taken ill when my lift pump went to diesel heaven several months ago.....

 

[tcourse]

Jon

Yes, the surge is gone. Every thing is great at this time.

Don't know what was going on but it cleared itself up.

Thanks again for the help.



Terry

 

[fj40charles]

Terry,



How did you connect the power to the UFM box? Did you use fuse #17?



Thanks,

Charles

 

[tcourse]

Charles

Charles,



I Used the Windshield wiper fuse. Used a Mini fuse tap and put a 10amp(to big?) to the box. Wasn't sure at the time which one to use but figured wipers were off the key and box wouldn't add much load to that 25 amp circuit.

Is 17 a better choice.



Terry

 

[fj40charles]

Terry,



I believe fuse #17 is switched and is what Aaron at Edge recommends. I think a 10 amp is plenty. Those piggy back style fuse taps work well.



Charles

 

[Blacksdieselhp]

I'm glad to hear everything is going good. I just though I'd run this by you in case you have anymore trouble. I installed a pump cover on my VP-44 and for a long time I had the same problems as you. I am using the Edge Drag Comp. I sent three back and they sent new ones and still the same problem. So then we tried new wiring harnesses. Still had the problem. So it finally occured to me that this never happened until I installed the pump cover. The screws were loose where the wires bolt to the cover and I was losing connection. They have came loose several times since. So I tightened them and put a small dot of epoxy glue on the jamb nuts. They haven't came loose ever since.

 

[tcourse]

Blacksdiesel

Thanks for the reply. It was very timely. Problem came back today. Will check those connections and try again.



TC

 

[John]

Terry, Charles is onto something! Edge SPECIFICALLY STATES that you have to have power WHILE CRANKING (not just after the engine is lit) in order to prevent setting a code. That's why they state fuse 17 as a connection point.



Myself? I tapped into the wire downstream of fuse 17... I wasn't very enthused at using the supplied fuse piggyback terminal ( )



~ keep us posted ~

 

[WadePatton]

Okay this is catching, now mine is doing it. It started the other day and visions of VP flashed before my eyes:{. So I pulled all the connections and greased them. I also snugged the tap screw just a bit. It went away and all was smokey for a day or two, but now it's back.



It's just fine off or on level one, but after that it huckabucks when the fuel is called for.



This time I'm going to pull the (BC)cover and check it out fully. Fingers crossed.

 

[Chipstien]

Is your lift pump working. I will assume you started with the basics. I would tighten the screw that taps the wire. Be careful as you can break the circuit board. If all else fails then PM me... . I have a Drag UFM and live in Renton. Good luck.

 

[tcourse]

Not solved yet

The problem is not consistent on mine. It will surge, the check engine light will come on and remain on even after the problem goes away, until I have enough start/run cycles for it to go out. (until the next time).

3 days before install I checked FP at discharge side of filter and had 15@idle, 10@WOT with DD3's and EZ.



I'll be off work for the next 2 weeks, so I'll check pump cover and all connections, and try to get my dakota digital FP gauge installed.



Wade, if you figure it out let me know. I'll let you know what I find.



Terry