Question about 1991 Pontiac Bonneville
Posted by Anonymous on
Find the wire on the top of the tank and ground it with a test light,with the key on,if it goes to empty,then unplug it from the tank,the fuel gauge should go to ful,if it does these two things,then it is in the sending unit in the fuel tank.If it does not move,then replace the fuel gauge in the dash,If this was at all helpful,please rate,thank you.
Posted on Jul 29, 2010
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Posted on Jan 02, 2017
Hi: It Sounds like you Either Have a bad Connection on Your Gauge or the Sending Unit which is in Yout Gas Tank.Your Fuel Pump and Sending Unit Are Located In Gas Tank.Check and Make Sure your Connections are Good and Clean 1st. But it Really Sounds like your Sending unit has Gone Bad.To Replace Sending Unit You'll Have to Drop The Fuel Tank,Empty As Much Fuel as you Can Either Drive till its empty. Holding your Tank Up is 2- Metal Straps with Threaded Bolts and Nuts, Spray with WD-40 And Let It Set awhile Cause Normaly the Are Dirty. Then Take Eiter A Deep Well Socket if it will reach the Nuts,Or Use A Wrench -Remove BOTH NUTS And also at the Filler Tube You'll Probally have a2-3 Screws you'll need to Take Out. Your Tank Should Come on Down.NOTE: Don't PULL the tank out Until you take your Wire Connects Off Remember Which ones Went where. Then Slide Tank out Away From Vehicle, On The Top Of Tank where you remove the wires where thers a Metal Retaining Ring, You'll need to Spray with wd-40 and Remove that Ring,Buy taking a Screw Driver and small Hammer and Tap it out Going Counter Clockwise. After its Off you will be able to Remove the Complete Fuel Pump Assembly. All you'll Need is to Remove Sending Unit.Since Fuel Pump Was Working Right.See if your Auto parts Store has only the Sending unit.if not try Dealership, Hopefully You Won't Have to Replace the Complete Unit. Hopefully this will help you. Please Let Me Know By Voting for me on the Quality of Solutions i've Given you,And Leave a Testamony if You Will. Thanks From The WYOCWBOY
Posted on Jun 02, 2010
Three things to check
Pull the plug that goes to the sending unit there will be 3 or 4 wires in it, use a volt /ohm meter set it to dc volts, check and if you have power going to two of the wires, this will be the pump and sending unit power. then set to the lowest ohms setting and check the other wire/wires to see if they are grounded to the frame, you will have to find a good ground on the frame. if you find a bad wire you will trace it back to the short and repair it. If these all check out good then you have to go to the instrument panel. I have had very few guages go bad, usually the most of ar the whole instrument panel goes out instead of one guage. You will have to pull the instrument panel out. Remove the bezel in front of the panel, usually two screws above the panel and the rest pops out. then four screws to remove the panel. Alot/ most of the time I find that the plug is coming out of the panel. I suggest you remove it all the way then plug it back in, do both plugs. If the plugs are mounted on the frame then all you need to do is push the panel back in place. First make sure the plugs are not loose in the frame. If they are resecure them. then recheck the fuel guage. if it is not working you will have to take the panel apart, about a half dozen screws. then you can check the guage itself for continuity. if it is bad replace it. If you need any other help with this let me know.
Posted on Nov 10, 2010
SOURCE: I have 1990 Mazda Protege
This is the way it is suppose to be. Mazda doesn't want you to run out of fuel. So they want you to think it is out of fuel when it has 2 gal left. Plus it is hard on fuel pumps to run low. The pump are cooled by the fuel. This way when you think you are out and need to fill it up you aren't completely out . The only way you can change this is to pull out the sending unit and bend the float arm down a little bit.
Posted on Feb 14, 2011
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