Re: 4020 diesel pings / knocks when starting

Posted by RJ-Az on September 19, 2003 at 20:04:53 from (171.75.23.137):

In Reply to: 4020 diesel pings / knocks when starting posted by Dave Swenson on September 18, 2003 at 06:44:54:

You don't say how old a machine you have. I know a 4020 is considerd old by some. It sounds like your injection pump advance is sticking. The pinging is called fuel rattle and is caused by overfueling on cold startup. Could be time for a pump overhaul as well as fuel injector tune up. Both the pump and injectors are rebuildable by any reputable diesel shop.

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