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99 ws6 temp gauge issues. Pcm correct

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Old 01-23-2018, 02:42 PM
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Default 99 ws6 temp gauge issues. Pcm correct






Trying to track down a temp gauge issue. Pcm is seeing correct temp and comes up with temp. Gauge shows like 200 at all times, no exceptions. Where do i start in tracking down the issue? What wires feed the cluster he info?
Old 01-23-2018, 02:58 PM
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I don't see an issue. First, in the picture I see the IAT gauge, that is for the intake air temperature, not the engine water temperature. Second, you have a '99 that uses digital gauges, not analog. The '98 three prong temp sensor actually read the real time temperature to the gauge cluster. For '99-'02, once the temperature warms up, the gauge will pretty much sit at 190-200 all the time while the car temp is within operating range.
Old 01-23-2018, 04:06 PM
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The ECT is directly above that, in bothe these pictures were taken 10'seconds apart. The pcm reads 39*, the dash says 200 ish. It. does. Not. Move. Period.

I know about the dummy gauge, I also know at -10 degrees first start, the gauge should not read 200*. The gauge doesn't move. Period. At all. From -10 outside first start, to warmed up and operating temp, it says 200 the entire time. I've had 4-5 of these cars, they all start at the cold peg and come up to the middle when it's warm. THis car is doing nothing.
Old 01-23-2018, 04:14 PM
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Originally Posted by Cwarta
The ECT is directly above that, in bothe these pictures were taken 10'seconds apart. The pcm reads 39*, the dash says 200 ish. It. does. Not. Move. Period.

I know about the dummy gauge, I also know at -10 degrees first start, the gauge should not read 200*. The gauge doesn't move. Period. At all. From -10 outside first start, to warmed up and operating temp, it says 200 the entire time. I've had 4-5 of these cars, they all start at the cold peg and come up to the middle when it's warm. THis car is doing nothing.
Gotcha, yeah, that sounds like a problem. I originally thought you were asking why it doesn't read "accurately". Have you tried a new temp sensor? They aren't too expensive.
Old 01-23-2018, 04:32 PM
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No problem, no I have not yet, just because it's working correctly according to my vcm scanner. Also, if you unplug the sensor, it goes to -48 or whatever it is on the vcm scanner, gauge doesn't budge.
Old 01-23-2018, 04:45 PM
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Already been given good advice, its the gauge. Gauge and PCM get info from the same place. ITS THE GAUGE.
Old 01-23-2018, 05:22 PM
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Alright, I'll try and source a used cluster. Lt1 and v6 won't work?



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