I am having a longer cranking issuse then i ever experienced ,I just had a airdog installed and now have excessive cranking ,now I have exchange a few sentences with one of the mopar members here and this is what I just did, 1st> the truck sat all night, went out unpluged the airdog turned key to start and it fired up about a 1 second or less crank,turned it off right away, 2nd> I plugged the airdog back in and turned the key to start without waiting for pump to prime it took about 1 1/2 seconds to crank over, 3rd my truck is sitting in a driveway with the front faceing up hill when it started the 1st and 2nd time I drove it for about 13 miles and about 30 minutes 5 miles freeway the rest stop and go lights with the truck warmed up setting in driveway front end up again I shut it off and let set for about 15 minutes ,4th I went back outside and put the key in and turned to on position let airdog prime when it shut off I turned key to start it and it cranked for about 3 to 4 seconds before starting left it running for about 6 minutes turned it off ,5th I let truck set for about 25 to 30 minutes I unplugged airdog again turned key to start position and it fired right up 1 second or less.:banghead:

I found this company in BAY CITY, MICHIGAN that rebuilds the VP44 and they claim that they were the 1st company in the USA to have the BOSCH 815 test bench and have been rebuilding Injection pumps for over 40 years I would like to know if they are certified by BOSCH rebuilders or they just bought the test bench I really dont know I talked to a guy over there Named Gary and it sounds like he is very knowledgable .

Here are the ones that Mike has found. Recognize any of the names?http://articles.mopar1973man.com/2nd-generation-24v-dodge-cummins/25-fuel-system/247-bosch-certified-vp44-injection-pump-rebuilders I dont know if you can just buy the machine, but who knows? If this guy is cerified Mike can add the name. What kind of price is he asking or did you go that far?

He told me that a new pump would be 995.00 ,he also said it has a new pcm,new upgraded diaphram ,there were several new things and some that were reused because there is no reason to change he went over it with me ,I will call him back and confirm all this first before buying. He didnt even try to sell one to me without doing a couple of test first .

i have saw this after a good lift pump was put on a vp truck. i talked to a fass tech years ago and he said the vp head was wore. he had me to wire the fass so it would pump with key on but not while cranking. so i ran a wire to the electric window. someguys here puts a regulator on the fuel supply. i have saw pumps run several years like this. its worth a shot to find out.

His price is in line. sounds like he is putting the right stuff on it. Maybe he knows something you have not tried. What is the name of the company?

Diesel fuel injection rebuild center inc. http://dfisam.com/sam-p100-st.htm this is there website I still have to call them ,I am mid way through disassemble right now I have the 1-2- and 4 injection lines off and I am having trouble finding the bracket under pump locating the bolts and remove them ? everything is off thats to be off except the pump and hold down bracket.

I dont think my 02 has that braket. As I remember it just had 4 mounting bolts. thats was 1.5 years ago though and the memory isnt always that good. I take your are going to take to them and have them test it? sure appears they have the right test bench, or at least a picture of one.

just pulled the pump off ,and I called Gary at diesel fuel injection rebuild center and asked him again whats new ,he said they recieve the pump housings from Bosch that have been refurbuished by Bosch and when the get them they install : new advance piston ,new rollers , new shoes , new diaphram/dampner, and new gaskets and eigther it comes from Bosch with a new PSG or they install a new PSG for 996.00 . Hex thanks I already Veiw all the Vids on youtube and talked to all of yous on this site and was talked into doing it myself ,I will let you all know how it goes when I get the pump in.

good luck jas, you got it off. Getting on is just the reverse. Watch that key way. Crushed or dropped in the gears is a rel heartbreaker.

Forgot to mention before ,I noticed a small plug connection under the pump and found out its a cam sensor ,my thing is this has been in there for 152000 miles do these ever go bad ? I am leaning towards replacing it now because of the simplicity of doing now before the pump goes in or do these things hardly go bad

Some do go bad and some last a very long time... 195K and still going...

I have 253k and still going strong, but you never know. I kinda wish I would have replaced mine when i did the pump, but I did not even know what it was then. I guess I wont sweat it. They seem to last a long time, but you just dont know how long.

I guess I should replace it for the simplicity to do so now ,It looks like 1 hold screw , before I take this thing out is there something I should know ,the cam does not have to be in a certian position or anything else does it just pull out or screw out anyone have any insite

You can just take it out and put a new one in. No need for anything special.

looks like it has a threaded end I guess I will unscrew it and screw the new one in, last time I did preventative maintenace I ended up having to change out my VP ,just recieved my new VP today and they also sent me a new check valve I didnt expect that I see others advertise that its not included ,hope mike puts there name on this website for others .

I dont know that my vp had a new check valve, one was installed in the pump and i never gave it any thought. Maybe thats why mine cost $1700.

[TABLE=class: page, width: 100%, align: center][TR][TD][TABLE=class: tborder, width: 100%, align: center][TR][TD=class: alt1, bgcolor: #F5F5FF]I would like to thank all that help me diagnose my hard starting ,I finally bought a fuel pressure gage Isspro ev2 electric and installed it.Last week I dropped the tank to see if the nuckleheads that did the install of the Airdog ll and found that they broke my sending unit and put it back in the tank ,and the holes that were supposed to be 1/2 or larger were only 1/4 inch if that so I used regular hose clamps instead of what air dog supplied fixed the broken sending unit bracket and put it back together ,I found out buy Cummins Dealer that whoever installed the Airdog did not adjust the fuel pressure to Cummins specs the had 25psi which could of damaged the VP44.I ended up getting a new VP44 from Diesel Fuel Injector Rebuild INC. in BAY CITY MICHIGAN ,THESE GUYS ARE VERY HELPFUL ,any way I installed it along with a cam sensor that was very accessible and it seems to be running like before ,THANKYOU ALL AGAIN:[/TD][/TR][/TABLE][/TD][/TR][/TABLE]

Happy you got it running.

[TABLE=class: page, width: 100%, align: center] [TR] [TD] [TABLE=class: tborder, width: 100%, align: center] [TR] [TD=class: alt1, bgcolor: #F5F5FF]I would like to thank all that help me diagnose my hard starting ,I finally bought a fuel pressure gage Isspro ev2 electric and installed it. Last week I dropped the tank to see if the nuckleheads that did the install of the Airdog ll and found that they broke my sending unit and put it back in the tank ,and the holes that were supposed to be 1/2 or larger were only 1/4 inch if that so I used regular hose clamps instead of what air dog supplied fixed the broken sending unit bracket and put it back together ,I found out buy Cummins Dealer that whoever installed the Airdog did not adjust the fuel pressure to Cummins specs the had 25psi which could of damaged the VP44. I ended up getting a new VP44 from Diesel Fuel Injector Rebuild INC. in BAY CITY MICHIGAN ,THESE GUYS ARE VERY HELPFUL ,any way I installed it along with a cam sensor that was very accessible and it seems to be running like before ,THANKYOU ALL AGAIN: [/TD] [/TR] [/TABLE] [/TD] [/TR] [/TABLE]

So, I wonder if it really was the vp44? Or was the truck being starved for fuel because of the small holes?