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Challenger fuel sending unit #956803
03/23/11 10:09 AM
03/23/11 10:09 AM
Joined: Sep 2007
Posts: 196
Riyadh, Saudi Arabia
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Merlin45 Offline OP
member
Merlin45  Offline OP
member
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Joined: Sep 2007
Posts: 196
Riyadh, Saudi Arabia
I'm looking to replace the fuel sending unit in my tank (74 Challenger). This is my first attempt at this and need some insight as to what to expect. Over time I've had other units installed and they always seem to have issues in regards to working properly, what do you recommend as a good unit, quality is important. What other factors do I need to consider? I'm not sure if my fuel line is 1/2 or 3/8 or is this a "non-issue"? Lastly, can anyone provide tips on changing out the unit (Do's and Dont's). Thanks.

Re: Challenger fuel sending unit [Re: Merlin45] #956804
03/23/11 12:59 PM
03/23/11 12:59 PM
Joined: Dec 2004
Posts: 733
Northern Virginia
Moparmaniacc Offline
super stock
Moparmaniacc  Offline
super stock

Joined: Dec 2004
Posts: 733
Northern Virginia
I believe you need a 5/16".

Just make sure you have a good ground...

Re: Challenger fuel sending unit [Re: Merlin45] #956805
03/23/11 02:18 PM
03/23/11 02:18 PM
Joined: Jan 2003
Posts: 1,359
Buzzard County, FL
IronWolf Offline
pro stock
IronWolf  Offline
pro stock

Joined: Jan 2003
Posts: 1,359
Buzzard County, FL
Well, if you are SURE it's the sending unit, be aware that many times it's a grounding issue. After I pulled mine out, I did the check with a multimeter per the FSM , and it was fine. I had cleaned the ground strap, but that turned out to be the problem . I rigged a test wire with alligator clips, and the sender was OK.

If you are NOT pulling the fuel tank, I would invest in one of those $8 lock ring tools. On an E-Body, you don't have a great deal of room to swing the hammer onto the brass drift you will need if you don't get the lock ring tool. The tank has a "ledge" just above the leaf spring.

Get a fire extinguisher, if you don't already have one. Hate to be obvious, but stuff happens.The FSM advises to drain the tank, but I would think an empty/almost empty tank might have more fumes ?

The rubber tank gaskets they sell aftermarket do not fit exactly right (they have a smaller inside dimension), but do work if you can get the tangs on the fuel sender into the slots in the tank opening. If I had to do the job again, I would try and ask if the dealer still can get them.

Good luck.

Re: Challenger fuel sending unit [Re: IronWolf] #956806
03/23/11 09:30 PM
03/23/11 09:30 PM
Joined: Sep 2006
Posts: 202
Texas
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ef8Cuda340 Offline
enthusiast
ef8Cuda340  Offline
enthusiast
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Joined: Sep 2006
Posts: 202
Texas
I would consider changing out the sock (filter) at the end of the sending unit. On two cars that have sat for ages, I had to clear the sending unit line of gunk.

It's an easy job to do, but as someone said, play it safe with potential gas leaks or fumes.







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