Gas Gauge Always Full
Thread Starter
Drifting
Joined: Nov 2002
Posts: 1,455
Likes: 2
From: East TN
Gas Gauge Always Full
I noticed after my audio install that the gas gauge reading is always at full. Another thread suggested that at a high ohm reading on the sending unit the PCM interprets this as full. So I think I must have unplugged or broken this wire connection somewhere in the car. Does anyone know how the wire from the sending unit is routed in the car from the sending unit to the engine compartment?
Race Director
Joined: Feb 2001
Posts: 13,911
Likes: 101
From: Manassas VA
NoVa Events Coordinator
St. Jude Donor '14
I'm working a similar issue with my 96.. however I didn't install an audio system and don't think the wire is broken but anything is possible. I called Gordon to trouble shoot... I'll post my results.
robert
robert
Last edited by Bluewasp; Mar 29, 2009 at 06:55 PM.
Thread Starter
Drifting
Joined: Nov 2002
Posts: 1,455
Likes: 2
From: East TN
Could be a ground that I unscrewed also I'm guessing the wire is routed on the right or left side of the trunk area and probably enters right in the middle of the back of the trunk where the hatch release mechanism is... but that's just a guess and I can't find this answer in the FSM... Would be interested to see what Gordon says.
Burning Brakes
Joined: Feb 2009
Posts: 785
Likes: 3
From: Richmond Virginia
I noticed after my audio install that the gas gauge reading is always at full. Another thread suggested that at a high ohm reading on the sending unit the PCM interprets this as full. So I think I must have unplugged or broken this wire connection somewhere in the car. Does anyone know how the wire from the sending unit is routed in the car from the sending unit to the engine compartment?
Wire shorted to ground ie... pinched or screwed to ground =FULL
Take it for what it's worth.
Thread Starter
Drifting
Joined: Nov 2002
Posts: 1,455
Likes: 2
From: East TN
This is the quote I got about the wire having a break...
The other thing I've come across is having to clean the sending units contacts which I will do anyways since it probably will need it soon even if it doesn't solve the problem.
Since the gauge reads full with the highest ohms, it stands to reason that there is too much resistance in the wiring between the sender and the gauge. Inspect the wires for breaks or partial breaks and the connections for poor contact. A faulty ground could easily be the cause.
The other thing I've come across is having to clean the sending units contacts which I will do anyways since it probably will need it soon even if it doesn't solve the problem.
Burning Brakes
Joined: Feb 2009
Posts: 785
Likes: 3
From: Richmond Virginia
Think I need to find something else to do with my rainy day..sorry about the bass ackwards reply LOL
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
As far as I know - tank to right side hatch (you might just disconnect the harness at the pump to see what the gage shows). Down the rear of the right side door frame - under the passenger door - back up through the cowl and then behind the dash to the display. Rear speakers and rear wiring are usually wrapped up in that harness so there are quite a few wires. If you swapped out the right rear speaker, probably reasonable to start looking there - screw through the harness.
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