Question about Cars & Trucks
Diesel engines don't need much, but they do have their quirks. You replaced the pump. I assume you had good reason to do so, I am not sure I could tell you how to tell if one was bad or not. But you did it, I assume on good advice.
One thing diesels are notoriously sensitive to is air in the diesel fuel lines. Diesel fuel does not compress (to any appreciable degree), but air does. When air gets into the diesel lines, the pump cannot pump fuel to the injectors. The process of removing this air is called "bleeding" the engine. Basically, start at the fuel pump and work toward the injectors. You loosen one end of each hose fitting while cranking the engine to allow the air to escape (open the compression releases on the cylinders if you have them to aid cranking the engine). Retighten the fitting to prevent re-entry of air if you stop cranking the engine for any reason. It is a little like a mechanical dance, but 1 guy can do it. When the fuel quits spitting and hissing at you but comes out in a steady stream from the fitting, the air is gone, you can tighten the fitting and move on.
On my boat engine (yes, I know you have a car, but it is still a diesel), a Yanmar 30 horse diesel, the hose from fuel pump to filter is bled first. Then from filter to distribution pump. Then from pump to each injector. When the fuel flows cleanly from each injector you have bled the air from the diesel lines on the engine. If you have compression releases, close them and crank the engine and it should start. If it doesn't, then you probably still have the problem that caused you to replace the distribution pump in the first place.
Posted on Nov 06, 2012
Did you prime pump
Posted on Nov 06, 2012
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Posted on Jan 02, 2017
there is a little mark on the crankshaft which you line up with the 'o' mark on the casing ..
remove the cam cover and look at the cam you should see a nob on the cam about 3 th lob and that should be facing just left of the engine ..
if you have a turbo there is two notchs on the injection pump pully ..if turbo there is a 't' mark on the rear of the cover the notch on the pully should mark up with the 't'..
the timing is set..
Posted on Mar 09, 2009
check to see that your mechanical fuel pump is working on the lower right side of the engine. VERY problematic pump due to design and location. Have you replaced your fuel filter with the injector pump swap? cause you need to do that , its a must
If your getting fuel to your injector pump you have to bleed the lines to each cylinder to bleed out the air in the system.
If that all checks out then you need to set the timing to 8 deg using a timing light and a diesel injection pulse width adapter timing tool.
purchase a haynes manuel for 6.9l/7.3l diesel engines to follow the correct procedure for setting timing to manufactures spec.
You will have to disconnect sensor at certain times during the timing stage so make sure it is done right!
PS - I hope you marked a reference line on the pump to line up with the line on the housing cause that will get you close to start! good luck
Posted on Apr 07, 2010
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