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#1
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Fuel Starved '78 300D
Hello,
I just replaced the IP on my '78 300D and get no fuel out of the injector pipes. I aligned the notch in the spline and collar before installing at 24 Deg. BTDC, adjusted the fuel flow by both drip and bubble method, and have a gush of fuel if I open the banjo to bleed the air. The pump doesn't deliver fuel when I spin the motor with the starter. Could it be that whatever the IP collar engages is faulty? Is there a way to check that, or whether or not the IP pistons are operating correctly? Regardless of timing, or any other factor, shouldn't the pump blast fuel out of the injector pipes? Any assistance will be greatly appreciated. |
#2
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Did you prime the living daylights out of it?
__________________
1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13 |
#3
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Yes, using the hand pump. I also have an electric fuel pump under the hood. A leftover from the WVO system that was previously installed.
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#4
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IP
Always a good idea to see what pressure is inside the IP Fill chamber..
You can tee a 0-30 psi gauge into the line between the filter and IP and read while cranking engine ... Should have 5~15 psi from lift pump through filter to IP... This would eliminate IP barrel fill as a problem area if the pressure is ok....
__________________
1978 Yellow 300D (The Mustard Toad) 1980 Blue 240D (The Iron Toad) 1989 Grey Mitsu.4WD Mighty Max Pickup (Needs a Diesel transplant bad) (Open the pod bay doors HAL) |
#5
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Loosen the Hard Line Nuts and see if you are getting Fuel up to the Injectors. This will also Bleed the air from between the IP and the Injectors.
Even if the IP happend to be out of time you should still get Fuel up to the Injectors. If you are getting fuel to the Injectors and it is still not starting I would check to make sure the IP was timed on the Compression Stroke of #1.
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84 300D, 82 Volvo 244Gl Diesel |
#6
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I've loosened the hardlines at the injectors and get only a dribble of fuel.
Not very impressive for a "high pressure system". I'm expecting to see a spray of fuel. Shouldn't that be so, regardless of timing? A timing issue I can deal with. Am I expecting too much in the way of pressure? Or could the problem be the drive mechanism to the IP spindle? |
#7
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IP
Still a good idea to see what the IP feed pressure is between the filter and input to IP...
__________________
1978 Yellow 300D (The Mustard Toad) 1980 Blue 240D (The Iron Toad) 1989 Grey Mitsu.4WD Mighty Max Pickup (Needs a Diesel transplant bad) (Open the pod bay doors HAL) |
#8
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Quote:
Also ounce the Hard Line Nut is loosend it is not so much pressure as it is velocity that would make the fuel spurt out. This is related to the Cranking Speed of the Starter. If you want to try this- Remove one hard line completely and crank the Engine. The fuel should shoot up out of the IP Delivery Valve Holder 1-2 inches. However, It will not be a large fuel quanity. If it will spurt out like that you are getting enough fuel. Have you tried to see if the Engine will start on WD-40 sprayed in the intake?
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84 300D, 82 Volvo 244Gl Diesel Last edited by Diesel911; 04-13-2009 at 01:54 AM. |
#9
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Thanks for the suggestions, so far, but nothing has worked.
I removed the pipe from the IP and I do get a stream of fuel shooting up in the air. I also tried to start it with WD-40, but it won't fire. I also checked the glow plugs and power flows all the way from 5 to 1. Any other ideas? I'm at a total loss. Thanks in advance. |
#10
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Divide and conquer. Since the engine refuses to start on wd-40. I hope you had the cover off and sprayed between the filter and intake.
I would critically check the glow plug system. Did you mention why you changed the injection pump? I just rechecked and you did not. If for a no start condition the glow plug circuit for certain has to really be verified and if that turns out good perhaps a compression check is in order. This is based on something should have occured with the wd40 and a working glow plug system. If you read the glow plug voltage to ground as the same down the series string it is inoperative. This is a 1978 with the squiggly wires? Last edited by barry123400; 04-14-2009 at 06:25 PM. |
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