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AEM temp gauge has gone schizo?

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Old 04-07-05, 05:54 PM
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Refined Valley Dude

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Question AEM temp gauge has gone schizo?

The readings on my digital Cyberdyne gauge have been erratic since last Friday. The change happened literally overnight - the previous day it was fine and normal.

Short version - the temp will read at a normal level around 190-197F and then suddenly plummet from anywhere between 5F and 40F, and then climb back up again by 1F-2F per second until it gets back up to a normal reading. The stock gauge continues to behave normally...

Has anyone else experienced this kind of failure? The gauge is less than a year old (August 2004,) so it's hard to accept that it just up and died. But the only other explanations that I can think of are:

- failing thermostat
- gauge's temp sensor somehow has goop/crap on it and it's fudging the readings

I've been a bit busy driving the car to try to keep a more detailed track of just what circumstances the temp readings dive.

I'm prepared to get another one - I certainly can't keep this one if it's f**ked up. I just want to know if anyone else has seen this kind of prob, or knows someone who has, and what they did?

Last edited by Amur_; 04-07-05 at 06:02 PM.
Old 04-07-05, 06:13 PM
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Cyberdyne sensors tend to fail pretty regularly.
Their fuel pressure gauge tends to do this a LOT.
Replacing the sensor should fix the problem.


-Ted
Old 04-07-05, 07:01 PM
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Hopefully a new sensor won't be too $.


Thanks for the reply.
Old 02-03-10, 05:41 PM
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Thought I'd post some follow-up. Is it too soon?

I called Cyberdyne, they said to ship everything back to them. The lady on the phone didn't ask any questions and they shipped a replacement out promptly. 5 years later and no new problems.
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