Before I buy injection pump....

[onetonjohn]

Figured I'd ask you guys.
Air intrusion symptoms for a couple months. Start then die. Continue cranking for a while - finally start.
Then no start at all. Figured air intrusion, so added plumbers tape and pipe dope to my water separator bypass job (last thing I touched).

Wait 24 hours to cure. Try again.
No start. Crank 10 times for 10 seconds each. Nothing.
Crack 3 of the lines. Crank 10-20 times for 10 seconds each. Nothing at injectors.
Check pressure at fuel filter with shreader valve. Fuel streams out with some pressure.
Change fuel filter.
Repeat. 10-20 times for 10 seconds each. Nothing. A little dampness - but not what I"m used to seeing.
Starter was hot to the touch. Waited a couple minutes between each of the attempts, but all that cranking got the starter hot (hopefully I didn't kill it).

I only drive this truck a few times a year to haul stuff. Last time I know I drove it was Christmas eve to pull my kid's Toyota out of a big puddle. Was hard to start that night.

So I'm thinking injection pump -> BTW I checked for power when key is on at both terminals of injection pump. Had power. Checked it a couple times - just in case it stopped getting power.

So I'm thinking injection pump, but last one I bought (from Orielly) was 1K and it only lasted 7 years. Thinking I'll have the local diesel shop rebuild this one. They will probably do a better job, but probably cost more than 1K.

So before I spend that kind of money, am I missing anything?

Will sitting with the new low sulfur diesel kill injection pumps when they aren't used? (this is my best theory right now).

 

[Rocknit4x4]

Seems like a lot of people on here have had bad experiences with rebuilt pumps and only really advocate for a select few companies to do the rebuild. I believe the ones I have read of most on here are Classic Diesel Designs and R&D IDI Performance. I know when my IP failed, I purchased a replacement from Justin at R&D and it has worked reliably for the close to 10 years since I purchased it. It seems like a lot of people suspect the rebuilds only replace some components, may or may not flow check them and it sounds like there are wearable parts inside the pumps that are hard to address without the right equipment, but I am no expert on this subject.

Give it a day or so and I would guess you will have a lot of other guys chime in as well.

 

[Rocknit4x4]

I missed one, a lot of people have had good experience with Moose Diesel as well.

 

[IDIBOBS]

So first 7 years is a good long while for an ip. They only last about 150,000 of use. Second if you got it from oriellys did you get the life time warranty if so it’s free to replace. 3rd try some atf.

Lastly you said you only drive it a few times a year. Diesels NEED to be driven often. Diesel gets gummed up after a short while compared to gasoline. That’s the very reason why consumer recreational rvs are not diesel. They sit most of the year.

A good pump from one of the many trusted online pump builders start around $400 if you do t have the oriellys life time warranty. And this time drive the truck more than a few times a year.

 

[kbenz]

Had mine rebuilt local from a standyne approved rebuilder. If you want to do an online guy I'd only use r&d,moose or cdd. If someone says they can do it for $500 run

 

[IDIBRONCO]

I was going to say to try many other things before replacing your IP. Then I read where you bought it from O'Reilley's so that would be back to my number one suspect. Still try other things first, but don't get your hopes up.

 

[Nero]

I had ran a napa rebuilt IP on my dads first idi, after we sold it, the guy who bought it had to replace it again. Before we sold it, it was having hot start issues. Only had maybe 10k on the pump.

Get from a quality builder.

 

[BeastMaster]

You stated purging the injection lines w/ no fuel showing up, yet you do have pressurized fuel at the IP inlet and know for sure the IP solenoid is working ( both electrically and physically )?

 

[onetonjohn]

I don't know how to check the IP solenoid (yet) I know it has power, but I have not checked that it's actually doing anything. That's something I can try.

 

[chickenpot]

I don't know how to check the IP solenoid (yet) I know it has power, but I have not checked that it's actually doing anything. That's something I can try.

you should audibly hear a click of the solenoid when ignition power is on and you pull the spade off the FSS wire off. touch it a few time to the terminal. should click. unless the pump is totally gummed up l, i doubt youll need a new one.

 

[Kdo58]

When ip was bad I would turn it over with a line disconnected at the injector and it would just dribble out.

 

[BeastMaster]

My concern in posting that was the stated history of inactivity. The IP valving mechanism may have frozen in place and need a little additional jiggling to free up.

I think it was Jesus Freak who had posted several of his woes of IP solenoids here and had interesting photos of his adventures into that area of the IP.

Edit: Link to Jesus Freak's Thread

Burning up fuel shut off solenoids.

Yesterday I got off work and while my truck was warming up, it suddenly died! I told about it in the "so what did you do with your truck today" thread yesterday. Anyway I figured out the fuel shut off was fried, wedged a screw in there to hold it open and drove it home. I have several extra...

www.oilburners.net

 

[BeastMaster]

When ip was bad I would turn it over with a line disconnected at the injector and it would just dribble out.

Doesn't surprise me to have fuel still dribble out of a worn IP. It won't develop enough pressure to fire off the injector.

I was concerned in your case that fuel wasn't dribbling out of a partially unscrewed ( cracked ) injector line retaining nut. That indicates to me the injector pump itself isn't seeing fuel.

But it's stated pressurized fuel is supplied to the IP.


From above...

"Nothing.
Crack 3 of the lines. Crank 10-20 times for 10 seconds each. Nothing at injectors.
Check pressure at fuel filter with shreader valve. Fuel streams out with some pressure."


I think this narrows the problem down to the IP inlet ( shutoff solenoid ) area. I don't have sufficient evidence to condemn the active pump/distributor part of the pump yet.

 

[Clb]

Cdd was only here a few years last posted in 2021
Aaaaand moved on.

 

[Kdo58]

Cdd has a fb page which they are quite active on.