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Re: HELP PLEASE with fuel gauge/sending unit
Lee7673 #537748 February 09th 2012 8:15 am
Joined: Aug 2005
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Originally Posted by Lee7673
Originally Posted by NatetheskateNCBV
Mopar sending units are grounded via the fuel line running up to the engine. That jumper strap must be in place for it to work.

[Linked Image]


Nate,
This is after market tank and sending unit. Its a Spectra sending unit (its the only after market brand I could find and I couldn't find a NOS one). The sending unit has three things coming out of it: a fuel line, a connection for the wire going to the gauge cluster and a tab with a wire coming off of it with a ring at the end for grounding (which I have grounded to the chassis). Do I still need the jumper strap?
Thank you in advance...I appreciate all of your input.


Ah so. Okay..I didn't know the new sending unit had a dedicated wire for ground. Are you positive the chassis is getting a good ground up the the battery? Mopar wiring in those years is a nightmare I admit...all the lights and stuff are grounded via the chassis as well.


Nate Breece
Re: HELP PLEASE with fuel gauge/sending unit
Lee7673 #537751 February 09th 2012 8:30 am
Joined: Oct 2001
Posts: 28,125
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Yeah, that's the strap lol



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Re: HELP PLEASE with fuel gauge/sending unit
Lee7673 #537752 February 09th 2012 8:34 am
Joined: Oct 2001
Posts: 28,125
Madman!
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Originally Posted by Lee7673
I spoke with a mechanic tonight and he thinks the tank might be positively charged (due to all of the excess wiring in the van....a wire might have been hit with a screw...he had 4 batteries in the van....its a mess). He said if it was it would only take a couple of millivolts to cause the gauge not to work.
Thoughts?


That's kinda where I was going with the strap deal I was talking about. I wouldn't think the tank being charged would make a difference though because of the rubber seal between the tank and the sending unit. I guess anything is possible though. I you have a voltmeter, test the tank if it will read that low.


Ken Schwarz
Tricky Truckers, N.J.
Van Clan Plus One, Canada
Manse Vans, Finland
Rebel Vanners, N.J. "USA"
Toopa Sinner Tribe, N.C.

www.showvans.com

http://www.cardomain.com/ride/360991

[Linked Image]

"Coolness ALWAYS trumps comfort"
Re: HELP PLEASE with fuel gauge/sending unit
Lee7673 #538033 February 10th 2012 1:18 am
Joined: Jul 2009
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Lee7673 Offline OP
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YEA!!!! Problem resolved!!...great news. I have the fuel gauge issue resolved! I had two issues going on simultaneously. The float wasn't set right and there is a loose connection in the plug in the rear of the instrument cluster. Since the sender would always work out of the tank but never in the tank, I dropped the tank again (3rd time) and I took the rollover gasket off of the top of the tank so I could see inside and be able to manually move the sender float. I also hooked the sender up to a battery on my bench that was hooked up to a voltage limiter and a fuel gauge. I then put 5 gallons of fuel in the tank while it was out of the van and on my workbench....and nothing happened. I then put another 5 gallons in and the fuel was just beginning to touch the float!!! So I re-adjusted the float rod (bent it) until I was getting it to float and register correctly on the gauge. I then drained the tank again and re-installed it (getting good at this) and the fuel gauge in the van worked but then stopped. I realized that if I wiggled the plug at the back of the instrument cluster, it would work again. I have a very poor connection at the plug and will be changing out the cluster. It feels great to finally get this resolved. NOW......I can start replacing all of the brakes!!!!em resolved!!!

Re: HELP PLEASE with fuel gauge/sending unit
Lee7673 #539207 February 13th 2012 4:52 pm
Joined: Sep 2009
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old hand
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Glad to hear it! Always feels great to fix a problem so you can move ahead! smile


1972 Dodge Van "Tigerlilly" - Blazing Copper/Sandstone Metallic - 3850 lbs empty
13.47 @ 97.53 mph N/A - 11.94 @ 113.33 mph N2O - old 360/727 + Nitrous (N2O)combo
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1990 Celica Alltrac "Emma" - 2.0L 4cyl Turbo AWD - 327awhp - 21-22mpg freeway, 17-ish mixed daily use - 13.2 @ 108 best so far.

2007 Chrysler 300C SRT8 "Ruby Rod" - 6.1L Hemi - pretty much bone stock driver - With 425hp
Re: HELP PLEASE with fuel gauge/sending unit
Lee7673 #539212 February 13th 2012 5:04 pm
Joined: Feb 2012
Posts: 271
enthusiast
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Yay! Glad ya got it fixed! Maybe when you recover you can help me fix mine since you're a pro now?[Linked Image]


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'87 Ford e250 Starcraft camper van v8 5.8L 351W-HO
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