Posted by jdemaris on January 28, 2008 at 13:31:14 from (67.142.130.47):
In Reply to: Injector Pump Timing posted by color blind on January 28, 2008 at 07:50:57:
Most diesel injection pumps have an automatic timing advance that increases with load and RPMs. This is usually the first thing to wear in the pump and get sluggish. So, when you start fooling around and experimenting with timing, you cannot have it both ways. You may get it running good at low speeds, or at high speeds, but if the advance is worn - you never going to get right with both.
If you want to know for sure, you need ot check the advance, just as you would with a gas engine and timing light. On a diesel, you can also use a timing-light hooked to a "pulse-adpater" on #1 injector line. Also, some pumps - especially Roosamaster/Stanadyne can be checked by bolting on a $5 plastic degree window.
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