Gas Gauge

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Oct 23, 2003 | 09:26 PM

Leonard Bode

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From: Bemidji, MN

Gas Gauge

I'm having a problem with my gas gauge on my '86 F-250 4x4, when I fill up with gas the gauge goes below the E on the gauge but after a few miles (2to3 miles) the gauge reads full but then goes down really fast and it only does it every 4 fill-ups, it also does the same thing on the rear tank.
Could it be the gauge or something in the wiring or the sending unit?? Please HELP!!

Leonard Bode

1990 F-150 4x4 302 auto
1986 F-250 Ext. Cab 400 auto

Oct 23, 2003 | 09:31 PM

Torque1st

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Posts: 30,255

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If you have two tanks the chances are it is not both sending units, so it has to be the common point, the gage.

Don't even ask my why every four fillings tho... Some VooDoo priest has cursed your truck to do that!

Oct 24, 2003 | 09:22 PM

Leonard Bode

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From: Bemidji, MN

Thanks Torque1st. I have an extra gauge and I'll try that.

Leonard Bode

1990 F-150 4x4 302 auto
1986 F-250 Ext.cab 4x4 400 auto

Nov 29, 2003 | 09:26 PM

Leonard Bode

Thread Starter

Junior User

Joined: Mar 2002

Posts: 52

Likes: 0

From: Bemidji, MN

Gas gauge

Tried the gauge not one bit of difference, Could it be the fuel tank selector switch thats in the dash?? I'm at my wits end with this truck. Please HELP!!!!!!!!

Thank you,

Leonard Bode

Nov 29, 2003 | 09:28 PM

Torque1st

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If it is not the gage then check the common wiring between the gage and the tank selector valve. You may need to get yourself a wiring diagram. The Ford dual tank fuel system gets real complicated.

Nov 29, 2003 | 09:39 PM

Leonard Bode

Thread Starter

Junior User

Joined: Mar 2002

Posts: 52

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From: Bemidji, MN

I'll try that Torque1st I have a manual with the wiring diagrams in it.

Thanks again,

Leonard Bode

Dec 18, 2003 | 12:02 PM

BigCrzyRdNeck

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Joined: Dec 2003

Posts: 175

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From: Crosby.Tx

You could try checking your ground wire make sure it has a good connection.

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Dec 23, 2003 | 08:37 PM

F 2fifter with a 4 sixter

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Id check your gauges voltage regulator also i just changed mine my 84 F250 because i was having probles with all my gages and it has seemed to fix the problem its behind the instrument cluster ont he left hand side above your speedo it has 2 plugs that look like the 9 volt battery plugs and is held on with a little bolt the regualtor will be silver and if you can help it dont ever buy a new form napa ! all you will do is give them 29 dollars for nothing i went to junk yard got a ahnd full of trucks like mine in there and vans and broncos all the same thing and some diffren gauges and now mine works good

Last edited by F 2fifter with a 4 sixter; Dec 23, 2003 at 08:40 PM.