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| | | Re: HELP PLEASE with fuel gauge/sending unit | Joined: Aug 2005 Posts: 21,211 Likes: 25 Supreme Master | Supreme Master Joined: Aug 2005 Posts: 21,211 Likes: 25 | 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. 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 | Joined: Oct 2001 Posts: 28,125 Madman! | Madman! Joined: Oct 2001 Posts: 28,125 | Yeah, that's the strap | | | Re: HELP PLEASE with fuel gauge/sending unit | Joined: Oct 2001 Posts: 28,125 Madman! | Madman! Joined: Oct 2001 Posts: 28,125 | 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. | | | Re: HELP PLEASE with fuel gauge/sending unit | Joined: Jul 2009 Posts: 6,256 Likes: 164 Master Metal Sculptor | OP Master Metal Sculptor Joined: Jul 2009 Posts: 6,256 Likes: 164 | 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 | Joined: Sep 2009 Posts: 868 Likes: 2 old hand | old hand Joined: Sep 2009 Posts: 868 Likes: 2 | Glad to hear it! Always feels great to fix a problem so you can move ahead!
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 Viper V10 + 4L80E conversion in progress...
2009 Dodge Challenger SRT8 "Leelu" - TorRed - 6.1L Hemi/6 speed - Supercharged - SOLD
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| | | Re: HELP PLEASE with fuel gauge/sending unit | Joined: Feb 2012 Posts: 271 enthusiast | enthusiast Joined: Feb 2012 Posts: 271 | Yay! Glad ya got it fixed! Maybe when you recover you can help me fix mine since you're a pro now? | | |
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