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Oil and fuel gauges problems

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Old Oct 30, 2010 | 01:17 AM
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Default Oil and fuel gauges problems

My oil pressure gauge bounces around really fast. It will go from 0-80psi. Then sometimes it works fine. The sending unit has been replaced twice to no avail. Could it be that I have a short somewhere? Or do I need a new gauge? Also the fuel gauge bounces but it just moves about 1/4 tank back and forth about once a second. I have done nothing for this. So is it the gauge the sending unit or both? If it is the sending unit that is in the tank right? You can get to the tank/sending unit by removing the rear bumper? Thanks.
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Old Oct 30, 2010 | 08:28 AM
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Originally Posted by vetteman1981
My oil pressure gauge bounces around really fast. It will go from 0-80psi. Then sometimes it works fine. The sending unit has been replaced twice to no avail. Could it be that I have a short somewhere? Or do I need a new gauge? Also the fuel gauge bounces but it just moves about 1/4 tank back and forth about once a second. I have done nothing for this. So is it the gauge the sending unit or both? If it is the sending unit that is in the tank right? You can get to the tank/sending unit by removing the rear bumper? Thanks.
I would look at electrical connections to the center cluster. You may have a bad ground or a place on the printed circuit path that is delaminating.
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Old Oct 30, 2010 | 08:41 AM
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Originally Posted by markdtn
I would look at electrical connections to the center cluster. You may have a bad ground or a place on the printed circuit path that is delaminating.
Especially since you have 2 gauges acting up. Its doubtful the new oil sender and the old fuel sender are bad.
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Old Oct 30, 2010 | 10:17 AM
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I have a ton of info on the fuel gauge problems and you can find it here.

http://willcoxcorvette.com/repairand...lp.php?hID=277

I'm with above: I doubt the problem is from the gauges but rather the electrical parts in the cluster. It's very common for one of the fingers to come off the plastic and short out.

With both gauges doing similar things I think I would tear in there first.

The help page above list fuel gauges only but you'll see that there is also info on the printed circuit as well.

Also, on this link you'll find around page 4 or 5 the needed info to remove the center bezel. http://willcoxcorvette.com/repairand...lp.php?hID=263



Willcox
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Old Oct 30, 2010 | 10:44 AM
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Just a note on this. Oil pressure and Fuel both use the same power circuit.




Last edited by Willcox Corvette; Oct 30, 2010 at 10:47 AM.
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Old Oct 30, 2010 | 10:53 PM
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Thanks guys, looks like I have a winter project,
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Old Dec 31, 2010 | 02:21 AM
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The start of the project. I will have to replace some broken parts and redneck engineering along the way.
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Old Dec 31, 2010 | 07:52 AM
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Originally Posted by ...Roger...
Especially since you have 2 gauges acting up. Its doubtful the new oil sender and the old fuel sender are bad.
if one was bouncing, i'd say it was the sender.. 2 guages on the same pod... i'd be checking grounds!
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Old Dec 31, 2010 | 08:14 AM
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Originally Posted by vetteman1981
The start of the project. I will have to replace some broken parts and redneck engineering along the way.
Pics 2 and 3 of the wood supports is fairly common to see (been tempted to do this myself a few times). In #2 the wood is holding up the AC control,the very stiff temp cable pulls down on the control face and usually breaks the console where the screws go in. Be careful if you replace the console that you don't break the new console !!!

Pic #3 with the wood holding up the window switches. The console breaks where the screws go in holding the switches. Again be careful with the new console and make sure the screws are not too long or the holes are not too shallow.

What are we looking at in the last pic , the black tape ? If so the tape is factory.
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Old Dec 31, 2010 | 01:48 PM
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Originally Posted by Aflac
if one was bouncing, i'd say it was the sender.. 2 guages on the same pod... i'd be checking grounds!
If it turns out to be the grounds where do I find them? This is the first time doing somthing like this, trying to save some $$$.

Thanks
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Old Dec 31, 2010 | 01:55 PM
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Originally Posted by ...Roger...
Pics 2 and 3 of the wood supports is fairly common to see (been tempted to do this myself a few times). In #2 the wood is holding up the AC control,the very stiff temp cable pulls down on the control face and usually breaks the console where the screws go in. Be careful if you replace the console that you don't break the new console !!!

Pic #3 with the wood holding up the window switches. The console breaks where the screws go in holding the switches. Again be careful with the new console and make sure the screws are not too long or the holes are not too shallow.

What are we looking at in the last pic , the black tape ? If so the tape is factory.
In the last pic I was just showing what I will be replacing. I was a little curious about the black tape. it did look factory to my untrained eye.

I test fitted new screws in the old console and had to cut them down with no problems, will check new console very carefully.

Thanks

Last edited by vetteman1981; Dec 31, 2010 at 02:06 PM. Reason: adding info
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Old Jan 2, 2011 | 01:37 AM
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parts ordered now the waiting game .
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