If I have read things correctly, the early TD did not use electronics on the IP or a ECM. If this is true how did the engine-ip know when to enrich the fuel to the engine under boost.

Search helped a little, but I may have not known what to look for.

Richard

It didn't. It is basicly a 6.2 pump able to deliver more fuel. There is no anerod or anything to give more fuel under boost. The factory fuel setting was so low that coupled with the quick spooling GM turbo there wasn't much smoke.

Your right, DB2 automotive pumps, the 4911 model in particual, don't have aneroids or any sort of fuel/boost matching mechanism at all.

Even the ECM controlled DS4 Electronic pumps don't match fuel rate to boost pressure, which is why they ALL smoke black when you hit the throttle.

Its a diesel engine, running a little rich won't do anything but blow black smoke out the exhaust, when they're not smoking black, they're running lean which doesn't pose a problem for diesels either. Totally different theory from gassers.

So what do the electronics do for the later 6.5 engines. This may be a dumb question, but I would want some imporvment for the extra complacations. :eek:

Thanks
Richard

I believe the electronic pumps provide more precise fuel timing and metering, which in turn creates a cleaner burn, and lower emissions.

Electronics - easier to diagnose pump issues (except the predictablity of PMD failure), more parts to fail... flip the coin ;)

Thanks for the insite on this. I guess it might be time to flip the coin :eek:
I still guess I need more dig up more information, and see what kind of engine-truck I can find. I still like the KISS theory.

RIchard