Join Date: Jul 2014
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Injector Pump Problem
Hello All. I am new to the forum and new to Diesels, but having worked on Japanese motors over 20 years, I am mechanically inclined enough to get most jobs done once I ‘know what to do’, lol.
So I have an 84 Winnebago 6.2 that now gets no Injector fuel. It ran fine when I bought it a year ago and drove 4 hrs home, where it stayed parked and not started since then. When I did try to start it I smelled fuel and found the Injector Pump Accelerator Shaft leaking. I took the top off the IP and and figured out how to remove the shaft, making sure I marked the positions of ‘whatever components’ are attached on the passenger side of the shaft. I replaced the shaft seals and put it back together, first making sure the Fuel Cutoff Solenoid worked and it’s internal linkage placed as it’s supposed to.
I took the gas cap off, and on Crank I get plenty of fuel coming out of the Filter Bleed, the T-Valve/Water Bleed and the Return Line. With the top ‘off’ the IP, (again on crank), it fills with fuel at an estimated 1/2 cup a minute, (based on a 15 second crank). I removed an Injector Line at the IP , manually held the Metering Valve linkage to ‘open’, cranked 15 secs once a minute for 5 minutes; nothing, not a drop coming out to injector line!
Perhaps I missed something when taking the IP apart or back together, although I have now triple checked myself. Does anyone have any insights on what could be the problem?
I wouldn't think the IP just went bad from sitting for a year…hmmm, although I guess Water residue could have frozen up an internal piston or something. With that, anyone have experience in rebuilding these things? I thought about pulling the Metering Valve since this is what cuts off the fuel, and go from there. (I have found similar cutoff valves/ports clogged with gunk many times on regular Carbs).
Anyway, I have a vacation to go on with this ride at weeks end, so Any help is mucho appreciated. Thank You!