wierd speedo problem
03-22-2009, 01:31 PM
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Location: Anchorage, Ak
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Car: 1988 Pontiac Firebird
Engine: 5.0 TBI
Transmission: W/C T5
Axle/Gears: 3.08 Posi
wierd speedo problem
Alright i have a 88 firebird, TBI, WC T-5, And 118,000 miles on the car. Here is the problem. My speedo will work for 20-30 mins. before it starts to act up. In alaska i usually have to have the heater on, then after the heat has been on for a while the speedo will cut out intemittentaly. If i turn the heat off, and turn on the cold air it will start working after a min or two.
Also tapping the dash under the speedo will get it to register if its not working. I was leaning towards a loose connection at the dash, but it is the heating of the dash that puzzles me If anyone has ideas of what to check, your insight will be greatly appreciated. 
- Russ
Also tapping the dash under the speedo will get it to register if its not working. I was leaning towards a loose connection at the dash, but it is the heating of the dash that puzzles me If anyone has ideas of what to check, your insight will be greatly appreciated. - Russ 
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