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Old 10-25-2003, 08:23 PM   #1
Turbo9000
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Default Autometer Electronic Oil press. gauge Fritzin out

The Oil Pressure needle is going haywire when ever the oil pressure drastically changes...i.e. when at a complete stop and accelerating at any rate.

The gauge is electronic and has a seperate bulb mechanism where the oil is actually sent and sends the reading to the gauge via wires.

has anyone ever had this problem?
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Old 10-26-2003, 12:04 AM   #2
armand1
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How exactly did you install the sender unit? If it only has one wire running to it, perhaps there is a bad connection, or if you used lots of sealant on the threads when screwing it in, perhaps it did not make a good electrical connection with the block (ground).
Also, what exactly does "going haywire" look like, and when exactly does it happen, and when does it NOT happen?
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Old 10-26-2003, 12:18 AM   #3
Turbo9000
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By haywire I mean that the needle will rapidly move and twitch when there is a fast fluxuation in oil pressure. It works fine when the oil pressure remains the same...like at idle or at crusing at a constant speed.

The sender has one red wire coming from the back...and it did look a bit dirty/oxidized. The sender and gauge set-up was on the car when I bought it and has worked fine until today. I'll clean up that red wire and see what happens.

edit: speling
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Old 10-26-2003, 06:45 AM   #4
tmat3
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Check the ground connection on the sender. Make sure that the sender is placed on metal surface to ground itself.
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Old 10-26-2003, 12:21 PM   #5
Turbo9000
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Thats gotta be it... the lip on the end of the sender touches a metal hose line...there is alot of dirt and grime built up around it...Ill clean it up and hopefully that'll do it.
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Old 10-26-2003, 01:39 PM   #6
scoobyimprza
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I don't know how you grounded it, but if you grounded your light and sender grounds together then that might be what is giving you the problem. I had the same thing happening to my EGT guage. Just ground the signal ground seperate. I grounded mine to the strut tower.

Brent
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Old 10-26-2003, 01:49 PM   #7
Turbo9000
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I'll have to do some investigating...all the wireing was done by the previous owner.

But I can tell you...the gauge light doesn't blink or cut out while the gauge needle is twitching. Im not sure if that would be a sign of the two being wired togather.
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Old 10-27-2003, 05:14 PM   #8
Turbo9000
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Thanks for all your help guys...I cleaned the grounds and now it works great.
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