Re: Priming an injection pump help!

Posted by NC Wayne on August 19, 2004 at 23:17:01 from (205.188.117.10):

In Reply to: Priming an injection pump help! posted by Ken Macfarlane on August 19, 2004 at 06:23:29:

Ken, your correct in the fact that if the injector lines have air in them it can, in effect create an "airlock" when the engine is only turning at cranking speed. It isn't so much an airlock condition as it is that the pump has to fill all the lines under pressure and force the air out thrugh the injector which is alot harder for it to do than if it's simply filling a line up and forcing the air out an open end that's not under pressure. Cracking the lines, or keeping it running on ether long enough for it to pick up (which isn't a good thing to do as you probably already know) is the only way to solve this. The pump will only send a very small amount of fuel to each injector each time anyway, so even with the lines cracked at the injectors it may take you a little bit to get fuel up to them. Now if your pump is old and worn enough I have seen them where ether was the only way to get them to run fast enough and build enough pressure in the pump to cause it to regain it's prime and fill the lines. Hopefully yours isn't in that bad of shape. Just make sure you don't burn up the starter trying. Personally I've never seen where bleeding one at the injectors made that much of a mess. All you have to do is crack the fittings and if your concerned about the fuel wrap a rag around each injector to catch the excess. Good luck.

Follow Ups:

• Re: Priming an injection pump help! Ken Macfarlane 05:12:50 08/20/04 (0)

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