Re: Electronic to Mechanical Pump

Posted by Bob on April 03, 2006 at 19:31:30 from (64.21.249.40):

In Reply to: Electronic to Mechanical Pump posted by bm3501466 on April 03, 2006 at 18:17:12:

Does the truck have an automatic transmission?

If so, it needs the PCM that controls the injection pump to control the tranny. If the 'puter doesn't "see" the injection pump anymore, it's going to get pretty weird. It will likely go into "limp home mode", and refuse to shift up over about second gear.

If you have $$$$, you can buy a stand-alone tranny controller to operate the tranny, however.

Also, you would have to change to the older-style glow plug controller, as the 1994 controller is only a relay, operated by the PCM.

That being said, I have a 1994 with the electronic 4L80E tranny. I have owned it since it had about 54,000 miles on it, now it has 190,000.

I have replaced the Fuel Solenoid Driver ONCE in the years I've owned it. I moved it to a home-made remote mounted heat sink, and have never had trouble with it again.

I'm sure the injection pump WAS replaced before I got it, however, I've never had to touch it. So not all are bad. Actually, due to some real horror stories of folks throwing $$$$$$ at one of these trucks because the dealership did not know what was wrong, and attempted to fix it by throwing $$$$$$ parts at it, the system has gotten a worse "rap" than it really deserved, at least in most cases. MANY injection pumps were scrapped, some under warrantee, some not, because of simple things that could have been repaired, not involving actual replacement of the pump.

If you wiring harness and connectors are in good shape, the electric lift pump is good, and you have a decent injection pump and mount the PMD on a good heatsink (the module then becomes the FSD), the system should work well for you.

I have had quite a number of vehicles with the mechanical pumps, and the electronic system is hands-down better for cold weather starting (injection timing advance control is better), and, also mileage is better with the electronic system.

If your vehicle is fixed by a shop that knows what they are doing, or you become a member of the Diesel Page, and learn to troubleshoot and repair the truck yourself, there's no reason it shouldn't give good service for a long time without to many repairs.

Replies:

• Re: Electronic to Mechanical Pump jdemaris 06:04:15 04/04/06 (10)
  • Re: Electronic to Mechanical Pump RodInNS 10:56:58 04/04/06 (3)
    • Re: Electronic to Mechanical Pump jdemaris 11:32:44 04/04/06 (2)
      • Re: Electronic to Mechanical Pump RodInNS 15:17:47 04/04/06 (1)
        • Re: Electronic to Mechanical Pump jdemaris 20:08:02 04/04/06 (0)
  • Re: Electronic to Mechanical Pump Mike M 07:03:37 04/04/06 (5)
    • Re: Electronic to Mechanical Pump jdemaris 07:19:32 04/04/06 (4)
      • Re: Electronic to Mechanical Pump buickanddeere 13:40:23 04/04/06 (1)
        • Re: Electronic to Mechanical Pump jdemarisj 20:15:31 04/04/06 (0)
      • Re: Electronic to Mechanical Pump Mike M 09:24:25 04/04/06 (1)
        • Re: Electronic to Mechanical Pump jdemaris 09:38:41 04/04/06 (0)

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