Hi, i have a 91 ford ranger 3 litre. the fuel gauge sort of works, when its full it shows full, but soon after goes to empty or half, and is constantly changing the reading. does anyone have any ideas as to what the problem could be?
Also, any hints on changing the spark plug that is on the left side of the motor at the back? (underneath the heater core exchange box)
Thanks for any help in advance!

 

Welcome to FTE.

Kinda sounds like the in tank fuel sender has a problem. Maybe just worn out, maybe faulty electrical connection to it, so try wiggeling it at the tank connection, maybe some internal corrosion on the senders wiper from corrosion caused by gas with too much sulphur in it & if the latter is the problem, Chevron says it's Techron Concentrate Plus can help with that. Even if it doesn't work for the sender, it'll tidy up the injectors, intake valves, piston crowns & combustion chamber heads & if your lucky, maybe fix the intermittent fuel gauge problem!!!!
Edit: One of the autoparts stores has the 20oz Techron on a bogo special this month & that comes out to $6 ea, a good deal.
The 20oz size in the tank at the pump, before filling up, (so you get good mixing), with Chevron, Texaco, or CalTex gas, which already has some Techron in them, will raise the treat rate 10X above pump gas alone, so it might be worth a try.

On the spark plug removal, some folks have reported removing the passenger side inner fender liner & gaining easier access to plugs that way.
I have the 4.0L 60 deg ohv engine & I can get all three plugs out from the top, without removing the fender liner, by using a Craftsman spark plug socket & 3" extension on my 3/8 drive ratchet.

Some thoughts for consideration, let us know how it goes.

 

thanks for your suggestions!!! Ill give it a try, Thanks again!!!

 

Here is a link to the Techron buy one-get one deal. Chevron says if it's sulphate corrosion on the sender, from gas with too much sulphur in it, that Techron can clean it up & wake up the fuel sender. If it's a mechanical problem, or external electrical problem, it won't work, but at the very least it'll do a Summer time intake side liquid tune-up & thats a good deal for $6 if we haven't done it in a while!!! lol Let us know how it goes.
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