dash replacement
Veteran
Joined: Sep 2004
Posts: 326
Likes: 0
From: WPG.MB
Yes it will fit .In fact mine has the dash from a car in the late 80's .It's been so long I can't remember which one .The heater box is also the same one used in the cars .The tachs are not real tachs, so they work on v6 and v8 .The tach is driven by the computer not the ignition.
Champion
Joined: May 2008
Posts: 4,839
Likes: 5
From: Apex, NC
Not real tachs??? The tach is very real, and it's driven by the computer because the ignition system is driven by the computer. The computer holds the ground for the ignition coil until the crankshaft position sensor goes over the hole in the flexplate (or flywheel), then it ungrounds the ignition coil and allows it to be grounded to whichever spark plug is aligned with the distributor. The ignition timing in these trucks is soley controlled by the computer.
Last edited by 95_318SLT; Jul 25, 2009 at 12:30 AM.
Not real tachs??? The tach is very real, and it's driven by the computer because the ignition system is driven by the computer. The computer holds the ground for the ignition coil until the crankshaft position sensor goes over the hole in the flexplate (or flywheel), then it ungrounds the ignition coil and allows it to be grounded to whichever spark plug is aligned with the distributor. The ignition timing in these trucks is soley controlled by the computer, which is why the mp pcm requires 93 octane, cause it retards the timing to compress the gas more, but I digress.
Champion
Joined: May 2008
Posts: 4,839
Likes: 5
From: Apex, NC
Mine does the same thing, its just a bad ground, or intereference from something else. Mine will jump all over the place, and then drop to 0, and then start working again. I've just got better projects to work on rather than chase down the tach problem.
