| MacNeal dash issues [message #369075] |
Sat, 12 March 2022 15:34  |
rjw
Messages: 697
Registered: September 2005
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Senior Member |
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The first upgrade I made to my GMC back in September 1998 was to install a MacNeal dash from his company:
http://custominstrumentpanels.com/gmc.htm
I have no real complaints but I've had some issues with the dash over the years. The dash is about 20 years out of warranty.
I replaced the speedometer in 2013 because the odometer stopped working. Several of the gauges, including volts, oil pressure, suspension air tank pressure all read a bit off actual values, but I've learned to live with that over the past 20+ years.
However, the fuel pump switch apparently stopped working which is bad with EFI. As part of my initial startup I used to switch the pump off, crank the engine until I saw oil pressure, then turn the pump on to start. I did that to lubricate the engine, as part of my pre-start routine. Otherwise the engine starts immediately with EFI and I've heard much of engine wear occurs during initial startup before oil is being pumped through out the motor. Q-jet carbs do that automatically. Now I can't do that.
Now my gas gauge stopped working properly, as it reads full on both thanks. I know that means an open circuit in the wiring. Since the symptom is the same on both tanks, I’m thinking there is a problem with the actual gas gage or the fuel tank selector switch in my MacNeal dash.
I wonder if others with MacNeal dashes have had similar problems with gauges and switches.
Richard
76 Palm Beach
SE Michigan
www.PalmBeachGMC.com
Roller Cam 455, TBI+EBL, 3.42 FD, 4 Bag, Macerator, Lenzi (brakes, vacuum system, front end stuff), Manny Tranny, vacuum step, Tankless + OEM water heaters.
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