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Injector Pump troubles...
Old 09-04-2007, 03:22 AM   #1 (permalink)
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Join Date: Sep 2003
Location: Littleton, Co.
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Injector Pump troubles...
Hey Guys...How is everyone? I'm sorry that I don't post up much, but I still "listen in" all the time...

How about this one. "Red"(the 6BT Ramcharger) has been running great for the last year and a half. Mind you, 275,000ish miles and counting. Last Thursday, the wife told me that se started up a bit funny. Almost like starting up in the cold(it's been warm here in Colorado)...Real rough. Didn't think much of it but this Saturday morning, I got into Red and the ole Girl didn't want to start. Cranked it a bit more and she fired up, but died a second or two later. Tried again. Started up, but the low idle was down a bit and the came up to "normal". (Here's where you "flame" me) No guages...I know...I know...Anyway, Red runs normal for the most part. Seemed to lack power a little. It was already on the list to do, so I Changed the fuel filter, and pulled the lift pump off to see if it was fuctioning. It is. Put it all back together and nothing...

This morning...No start...AT ALL! She cranks over but didn't even feel as though she was going to fire. Came inside, seached the archives on the TDR, went back out, pullled the fuel shut off solonoid to check it. Seemed ok. Put the solinoid back in w/o the plunger...Still no go.

It was acting like it had been run out of fuel. I remembered what MadMax's truck was lke to start whne he changed the injectors and did what Kurt(GLHS) did...cracked the injector lines...What do you know! Fired right up! Ran fine. So I let it run a bit while I tightened up the injector lines and cleaned up. Shut it down and let it sit for approx 10 minutes. Went to start it up again and NOTHING AGAIN!! Uh-oh.

So I cracked the lines again and started it up(yes it fired almost right away). Bled the lines again, tightened them up and went for a ride. Felt fine. Nothing unusual. Brought it home, parked in the drive, shut it down and tried to start it up about 30 secs later. Real rough start. Shut it down. Left it off for about 3 minutes...Nothing. NOTHING again.

I believe I'm getting air from the "o=ring" between the pump body and head. Is it possible for the fuel to bleed back that quickly from any where else? Is it worth it to pull the pump and change THAT "o-ring? Do you guys think it might be more than just that.

Ideas? I'm stumped and in the doghouse. It's my wife's D.D.

Any ideas or a rebuilt "ve" would be greatly appreciated.
Thanks in advance!!!
Andrew
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1993 W-350 Club Cab 4x4 Dually. Auto w/O.D. 67000 original miles. All original and un Bombed.

1989 CTD RC 4x4. Full 1991 3/4 ton Drivetrain, Non IC, Auto(727), NP205, D61/71 3.07, 250,000 miles. ASA intake(yep, they make the for the NonIC'd trucks and the work well)!!
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