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Old 12-10-2012, 11:02 AM   #1 (permalink)
djdegroot
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no fuel to injectors

hey guys, my truck is a 1994 c1500 with the s code 6.5. im in the middle of doing a new injection pump,lines, and injectors. at first i had issues with no power to the injection pump or glow plugs. i researched and traced that back to a broken ecm ground. so that brings me to my next roadblock. i now have power to the pump. i can feel the fuel shutoff solenoid click with the key, and i have the lift pump jumped and pumping plenty of fuel to the pump. however when i crank im getting no fuel out the back side of the pump. at first i through maby the solenoid wires on the back of the pump were backwards. i switch them with no results. i drove the truck into the shop but it got water in the injection system and tore it all up. so other than the broken ground i haven't traced anymore damaged wires. ive gotten this far on my own research and just beeing a lurker on 6.5 forums, but this one really has me stumped. any input is greatly appreciated.....also the pmd i am testing with it mounted on a heatsync and used on a running truck so i know thats good.

Thanks,Dalton

Last edited by djdegroot; 12-10-2012 at 11:05 AM.
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Old 12-10-2012, 11:54 AM   #2 (permalink)
Graplr
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Where did you get the IP from? Is it newly rebuilt? Is everything plugged in correctly at the pump? Like the shutoff solenoid? That would cause no fuel to the injectors.
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Old 12-10-2012, 11:58 AM   #3 (permalink)
djdegroot
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the pump is brand new from a local, reputable shop and all the connections to the pump are hooked up. it all appeared pretty idiot proof as in the plugs only fit in one spot. unless there are similar plugs commonly confused? also theres a new CPS if that also would have any effects.
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Old 12-11-2012, 10:03 AM   #4 (permalink)
racer55
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Where is the IP/PMD harness ground fastened currently?

Since you have a 94 ,do you have the correct IP?
Some F vin engines used 5068 IP only in 94.
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Last edited by racer55; 12-11-2012 at 10:04 AM.
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Old 12-11-2012, 10:09 AM   #5 (permalink)
vstech
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look at the blue tag on your original IP and see if it's the 5068. Mine was not, but yours might be. if it is, then that's the only IP that will work on your truck without changing your computer.
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Old 12-11-2012, 01:20 PM   #6 (permalink)
FloridaHorseman
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Quote:
Originally Posted by djdegroot View Post
... i drove the truck into the shop but it got water in the injection system and tore it all up...
?????

If you had no fuel to the injectors how did you drive it anywhere?

Explain more about how and where water got into the IP and injector lines. Worst case scenario is that may have destroyed the IP and/or injectors. ~FH
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Old 12-11-2012, 04:42 PM   #7 (permalink)
djdegroot
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I'm sorry, I meant as in on the old Ip and injectors I got a bad batch of fuel and that was the reason for replacement. So I drove it in on a dying Ip. So the truck had no electrical issues before the swap. I will check the tags asap, but the original Ip I gave to them was deemed unsalvagable and they gave me a new one. So I really have no way to check other than maybe running the vin?
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Old 12-11-2012, 05:23 PM   #8 (permalink)
JMJNet
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You know that you have to crank a lot?

Till all the air is out unless the IP is not installed properly.
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Old 12-12-2012, 05:36 PM   #9 (permalink)
djdegroot
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Quote:
Originally Posted by JMJNet View Post
You know that you have to crank a lot?

Till all the air is out unless the IP is not installed properly.

i undstand the concept of getting all the air out, however i have been messing with it on and off for about a week cranking various times and i have pulled an injection line back at the pump to see if its even getting through fuel the pump and it doesn't seem to be. should it still take a lot of cranking to get fuel through the ip to start with? i cant see how as the ip is not that big.

also the pmd is still grounded to the pump with the head sync, pmd just laying in the valley atm
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Old 12-12-2012, 06:07 PM   #10 (permalink)
JMJNet
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You have to crank it till it starts.

LP needs to run all the time while cranking by putting 12V direct to the LP.
Crack open one of the injector line before the injector till there is fuel there then tighten it while cranking.

Again, unless the IP is not installed properly at least within a range that it is not out of timing.
If it is out of time then you will never get it started.
Check the thread about timing the IP at least to the range that it can start.
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Last edited by JMJNet; 12-12-2012 at 06:16 PM.
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