Forum: 64-65 GTO Tempest & LeMans TECH
03-29-2024, 12:14 PM
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Replies: 3
Views: 244
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Forum: 66-67 GTO Tempest & LeMans TECH
03-18-2024, 11:17 PM
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Replies: 7
Views: 384
Temperature gauge, the 3/4 line?
The temperature gauge: the spacing on the lines is non-linear. I am sure GM did that on purpose. Just FYI) The fuel and oil pressure gauges both read linear by design; +-2%.
My tests tell me...
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Forum: 66-67 GTO Tempest & LeMans TECH
03-07-2024, 12:52 PM
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Replies: 8
Views: 448
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Forum: 66-67 GTO Tempest & LeMans TECH
02-10-2024, 01:26 PM
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Replies: 6
Views: 431
The wiper switch ground strap
Here is a photo of a 66 Lemans dash bezel, the ground strap for the headlamp switch + the wiper/washer switch is highlighted in blue.
The '67 GTO/Lemans ground strap has one tiny bend in it that...
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Forum: Electrical Tech
10-24-2023, 04:12 PM
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Replies: 11
Views: 997
Rally gauge, temperature gauge inop.
After 50 + years those old style GM gauges in the #4 pod (65,66,67) all have a 95 to 98% failure rate. Adding to the problem many of the modern aftermarket replacement senders that are commonly...
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Forum: Interior TECH
10-05-2023, 03:31 PM
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Replies: 11
Views: 900
The sole purpose for that plastic strip and the...
The sole purpose for that plastic strip and the notch in the guide is to alert a possible buyer of a Used GM car, perhaps some years into the future that someone, at a past point in time had tried to...
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Forum: Electrical Tech
05-20-2023, 12:22 PM
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Replies: 6
Views: 758
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Forum: 68-69 GTO Tempest & LeMans TECH
02-11-2023, 04:03 PM
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Replies: 7
Views: 1,236
Stop driving the car, the speedometer is well...
Stop driving the car, the speedometer is well past it's designed in life cycle and it needs rebuilt. A dry or worn Cable can and will make the pointer jump and/or bounce but it would never move the...
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Forum: 64-65 GTO Tempest & LeMans TECH
11-02-2022, 06:12 PM
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Replies: 5
Views: 1,011
Just FYI, the shop manual for 1966 was written...
Just FYI, the shop manual for 1966 was written to assume the original bias-belted tires were still on the car.
The F.E. alignment #s for old school 1960s tires would not apply if you are running...
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Forum: 70-73 Firebird & TA TECH
10-23-2022, 03:11 PM
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Replies: 3
Views: 1,042
That plug-in is if the car has a turbo-400...
That plug-in is if the car has a turbo-400 automatic transmission. The passing gear kick-down is controlled via an electric switch mounted inside the car on a bracket mounted above the gas pedal. ...
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Forum: 61-66 Big Pontiac TECH
09-12-2022, 02:22 PM
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Replies: 15
Views: 1,553
Could you post a photo, of the gauge? If it's...
Could you post a photo, of the gauge? If it's still in the dash that's ok. There is a year break-point (on big cars) when Pontiac changed the gauge from zero to 31 ohms to zero to 90.
If I can...
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Forum: 61-66 Big Pontiac TECH
09-12-2022, 12:36 PM
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Replies: 15
Views: 1,553
Inside of that gauge there are 2 wire wound...
Inside of that gauge there are 2 wire wound coils. So the circuit is: 12 volts + battery power thru a fuse (key on) body ground at the rear steel mounting panel behind the dash where the gauge...
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Forum: Electrical Tech
08-12-2022, 02:23 PM
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Replies: 11
Views: 1,230
Gauge failure mode
This is most common failure mode which all 1965 and up GM car gauges have. Your pointer falling off all by itself is a sure sign the internal magnet-coil is out of it's original factory fill...
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Forum: Electrical Tech
07-19-2022, 12:37 PM
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Replies: 5
Views: 1,081
Fuel gauge test
In the #1 photo, test wires are: pink wire with the black tracer= 12 volts battery + power. Black wire = ground and the brown wire = variable resistance (the gas-tank sender).
These are 1970...
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Forum: Electrical Tech
07-19-2022, 12:07 PM
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Replies: 5
Views: 1,081
On the reverse of the fuel gauge there are a...
On the reverse of the fuel gauge there are a total of 3 threaded "posts." To bench test you will need some jumper wires + a 12 volt car battery and some fixed 3 watt or higher resistors. On...
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Forum: 61-63 Tempest & LeMans TECH
06-05-2022, 01:45 PM
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Replies: 4
Views: 1,017
I don't have a good pic right now but the next...
I don't have a good pic right now but the next time I am over to the garage where my car is I will take a photo of the back of the vacuum booster so at least you can see what one looks like. And...
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Forum: 70-73 Firebird & TA TECH
05-21-2022, 06:15 PM
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Replies: 8
Views: 952
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Forum: 70-73 Firebird & TA TECH
05-21-2022, 01:02 PM
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Replies: 26
Views: 2,704
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Forum: 61-77 GTO, Tempest & LeMans Parts WANTED
03-29-2022, 02:11 PM
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Replies: 8
Views: 1,293
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Forum: 66-67 GTO Tempest & LeMans TECH
02-01-2022, 02:49 PM
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Replies: 29
Views: 3,831
If a Delco A/C system has not operated in 30...
If a Delco A/C system has not operated in 30 years, the POA valve has probably gone bad. Those tend to stick or freeze in position if not used at least once per (season) year. One other thing...
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Forum: Electrical Tech
12-24-2021, 05:32 PM
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Replies: 15
Views: 2,761
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Forum: 68-69 GTO Tempest & LeMans TECH
09-03-2021, 05:26 PM
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Replies: 7
Views: 1,008
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Forum: Electrical Tech
08-31-2021, 01:23 PM
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Replies: 14
Views: 3,294
All those imported gauges are not...
All those imported gauges are not tested/calibrated using a sender that is because aftermarket senders all vary because none of them are made to the GM standard. The imported gauges are not exact,...
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Forum: 77-81 Firebird & Trans Am TECH
08-03-2021, 12:05 PM
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Replies: 28
Views: 4,806
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Forum: THE LOBBY
06-26-2021, 01:42 PM
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Replies: 65
Views: 9,729
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