ak diesel driver
6.5 driver
car code is what I use to time mine with. the pump will not self adjust
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Swapping an IP is not too bad. Pull the upper and lower intakes. The hardest part is getting to the lower injector lines on the back of the pump. (need a 3/4 inch crows foot). Take the oil fill neck off and you can get to the three bolts that hold the gear to the pump (just don't drop them down in the engine and you won't have to take the front cover off) The gear will sit in place when you remove the pump and there is an indexing pin so the new pump will only go on one way. If you get the timing close by ear and then the pump can adjust itself to the exact timing.
car code is what I use to time mine with. the pump will not self adjust
The computer stores TDCO and it won't change until you do a relearn. If you move the pump after a relearn the computer is basing most of it's logic on the stored TDCO. Will it run sure might even sound fine but you might be limiting how much timing you can get ie can't advance or retard as much as it should.
so what happens if you pull the wire off the sending unit so the PCM thinks it cold? Will it continue to run fine?
just wondering if your sending unit failed
You might call Leroy @Burning oil and ask him about the scan and time set tools he sells. I assume this is the 1999?
http://leroydiesel.com/products/auto-enginuity-scan-tool-for-gm-vehicles-96-2016/