thanks for all the replies and glad to say I finally got it fixed. A huge thank you and many cudos to Southeastern Electronics in Roanoke Va. I spoke with a rep from their company and he assured if they could not fix it there was no charge. Took the dash cluster out, mailed it to them, received...
as stated above, this is an electronic unit. first thing I did was replace the speed sensor on the tranny to no avail. researching other forums and you tube for possibilities.
1991 D150 2 wheel drive, 318 and 4 speed automatic. the speedometer hand will go to 100 or to the peg when barely moving. when this happens the odometer is flying as well. not a fast driver but super annoying to see the miles run up evry few second as this is a cherry truck with only 75,000...
thanks a lot. Been doing pro mechanic work for over 50 years, the last 38 in a shop leased behind a parts store, but its getting harder to find these old carbs that are rebuildable due to ethanol and sitting.
the present carb is a factory Holley that i cannot keep the accelerator pump working in as well as constant needle and seat issues causing flooding as well as a loss of fuel in the carb if the truck sits for a couple weeks without being run. this leads to either having to spin the engine for 20...
I want to replace the original 2bbl. carb on my 1985 D100 with 318 engine. would like to go back to the earlier 70's carbs and wondering if they are direct bolt on or are base plates too different. if so, any recommendations as to what type will swap without having to change intake manifold.
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