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Old 03-27-2008, 01:10 AM   #1
Join Date: Mar 2008
Posts: 17
Aftermarket fuel gauge not reading full

So, second question about my 87 wrangler.

The owner before me (or maybe even the person before him?) replaced the entire instrument cluster with aftermarket gauges. All fine and dandy for me - not the best looking install in the world, but the wiring in this thing is a nightmare and looks largely replaced (possibly related to what I see as some heat damage in the engine compartment I'm not even sure how much of the wiring to the CEC still exists - I don't get any engine light or the shift indicator), so I don't think there's any going back to the stock PCB gauges. ANYWAY...

Even when entirely full (optional 20 gallon tank, btw) the gauge only reads at 3/4 full. I haven't really wanted to risk testing if it goes past empty or not (ie, whether the E really means empty or if the entire gauge is somehow shifted down by 1/4). I was just wondering if anyone had any insight on whether this was a straight forward gauge issue or if there's a mismatch between the gauge and the sending unit. Is there a simple fix or do I need to somehow find a special gauge that uses a lower top-end voltage? I'm primarily worried that if there's some adjustment on this gauge then it might show 1/4 tank when its actually empty.

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Old 03-31-2008, 02:34 PM   #2
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Annoying Newb-ish bump.

No one knows anything about aftermarket fuel gauges?

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Old 03-31-2008, 02:44 PM   #3
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Location: elizabeth co
Posts: 270
i have heard that with aftermarket fuel guages you need an aftermarket sender??
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Old 03-31-2008, 02:44 PM   #4
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thats a weird one. i have no experience with that prob, but i'd say try finding an o.e. gauge and plug it in to test. otherwise, the reostat on the sending unit can wear out, and not read the float right. good luck
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