Hi All 

I have searched high and low and didnt seem to find anyone with similar issue. Just bought a 2002 6 speed with an edge juice and fass ddrp lift pump rebuilt VP at some point. The issue is sitting overnight it looses prime between vp and injectors. Parked nose downhill so front bumper was a good 2 feet lower than rear. Same thing only low pressure fuel to #4. After muchhhh cranking dribbles at 1 and 3. It will eventually fire up like nothing happened no smoke. pulls hard on road absolutely no drive ability issues fp 13 at cruise on level 3 and 17-18psi idle.

Tried unplugging lift pump to test for bad diaphragm and it still didn't start.

Sits for 2-3 hours and insta fire.

 

Its at the shop now and they tried to start it after sitting overnight and same thing no high pressure at injectors. Fuel at vp inlet no air. They hotwired the vp and instant high pressure fuel at injectors. Plugged harness back into vp and boom insta start. They checked the pin thats not supposed to have any power only after the key goes off and all was fine. No codes either.

Ecm issue ? 

Is it possible sticky rotor in pump and that the power from battery to the vp is stronger then what ecm sends ?

 

Thanks

Edited January 6, 20169 yr by moparguy55

Thanks for all the replies. I have the little controller that locks and unlocks doors horn blows when locking. Is that the security system ?

Edited January 7, 20169 yr by moparguy55

I would Leave it outside to have the no start condition. Have dude crank the truck. And check every circuit at the vp. Find the missing power or ground or bus. Then trace that wire back to the module to see if the wire is good. If the wire is good and ur not getting ur power or ground. Module is bad. 

Just be easier to ohm test from end to end. 0-5 ohms is a passing grade and anything above 5 ohms is a fail.

As for the ground it's located here... You can even unplug it and ohm from plug to plug for ground leg.

Edited January 7, 20169 yr by Mopar1973Man

Thanks for the diagrams. The ground over on the turbo side thats the PCM ground right ? I see there is a fuel pump relay where abouts is this loacted ? Im no electrical guru so please bear with me lol. I assume the ecm triggers the relay which is supposed to send power to pin 7 ?

The relay is in the PDC, under the hood, on the drivers fender well. I believe you are right on the relay but as I am not the electrical genius here I will defer to them. 

Edited January 7, 20169 yr by dripley

38 minutes ago, moparguy55 said:

I see there is a fuel pump relay where abouts is this loacted ?

Fuel Pump relay in the PDC.

38 minutes ago, moparguy55 said:

The ground over on the turbo side thats the PCM ground right ?

This is the master ground on the passenger side battery. There is no body mounted ground for the ECM, PCM or VP44.

39 minutes ago, moparguy55 said:

Im no electrical guru so please bear with me lol. I assume the ecm triggers the relay which is supposed to send power to pin 7 ?

Correct. Take notice this is a bit more confusing but the grounds all come to that G115 which is my picture above. Fuel Pump relay is in the upper right corner triggered by the ECM.

Outside in the cold the pump wont start the truck hotwired. Kid ran who knows what for fuel had a tank in the box. I guess this means the pump is no good.

Gelled?

13 minutes ago, Mopar1973Man said:

Gelled?

Same fuel in the tank as sunday when i dropped it off. Was -10 sunday and wasn't gelled. today its maybe -5 out today.All kinds fuel at the IP inlet and no air. I just wish there was a code.

Edited January 7, 20169 yr by moparguy55

Came across a 99 engine complete with wiring computers turbo 250k miles $800 sent me a vid of it running and ran strong.been out for 2 years. Vp with no fuel in it for that long problamatic?

That isn't a bad price.  There will be some engine differences though in terms of sensors you will have to work with for an 02.  

I wouldn't trust the VP on any junkyard motor. 

You can't use the engine that's for sure.  VP44... Hard knowing again how he's treated the pump. Most people get the raw end of the deal buying used pumps.

Thanks for the input guys. I had planned on snagging the vp and selling off the rest.the no run for 2 years kinda scared me. Id shoot myself if i put a 1800$ pump on and thats not it lol Be almost the price of a ppump conversion.

A reman'ed VP44 is just about $1200. P7100 conversion is about $3800. Not to mention all the things that won't work after conversion.

You need to stop by either DAP or Vulcan Performance.

 

Unfortunately im on the other side of the border. Best price on a bosch VP up here in canada is almost $2000 tax in. 

So DAP and Vulcan are the 2 recommended vp vendors ?

 

I was looking at bluechip and Vp44pumps.com as both had 2 year warranties. Bluechip was only place that warrantys a wire tap via the stealth cover from what i found.

Im sceptic to buy a new VP up here as i dont know if the whole pump is rebuilt or just the defective part and rebaged.

And yes the electric stuff after the p pump swap is whats making me hesitent. I found a running 12v for $900. thought all i needed was the special fuel lines and a boost elbow. But i like the power with the juice the truck has and virtually no smoke even on level 5 tromping on it. Thinking about it now maybe the vp was failing. Shouldnt it pump a lil smoke on a hard stomp on level 5 ? On the highway tromp it and im not sure you could even call it a haze from the exhaust. like slight tinge of black for 1/2 second.

Edited January 8, 20169 yr by moparguy55

Here is Vulcan at barely over $1,000

http://www.vulcanperformance.com/Bosch-VP44-p/vp44.htm

Here is DAP...

http://dieselautopower.com/bosch-027-vp44-fuel-injection-pump-standard-output-235hp-wire-tap-voids-2-year-warranty-vp44027/

Oh... BlueChip you have to pay at least $1,800 for a pump with a new PSG unit where both list above come with new PSG and been calibrated on a bench.

Edited January 8, 20169 yr by Mopar1973Man

I dont want to knock the blue chip pumps because I have one. Bought it about 5.5 years ago for near $1700. At the time it was the only pump that I found that came with new electronics on it and that was a the main reason I bought it. I have 143K miles on it with no issues and it has been on a 2 stroke diet 90% of its life. That being said it has not had any longer service life than many others here for me to say it was worth the extra. Blue Chip is a good company and has given me good service thru the years I have owned.

Golden info guys much appreciated.

 

This part on the DAP disclaimer has me wondering

Core:

Core deposit of $400 required unless core sent in advance. If a rebuildable core (ie. not seized, damaged, contaminated, disassembled) is not received in 30 days from date of shipment a reduced core credit of $200 applies for late cores. International orders have 45 days. IF YOU PURCHASE AN HO 245HP PUMP, YOU MUST RETURN AN HO 245HP PUMP. ANYTHING OTHER THAN AN HO 245HP PUMP RETURNED WILL RESULT IN 1/2 CREDIT.

So if it was crap fuel that ruined the pump on the truck they deem the core not rebuild able ?

 

Id probably not wire tap until the warranty is up.

Edited January 8, 20169 yr by moparguy55

That would be one to call DAP about. I know what you have stated above will void the warranty on a new one, not sure about the core.

Reading it sounds odd. "damaged or contaminated"

They are all damaged that is why you would be replacing it lol
I will call in before if i bite the bullet on a new pump.