4 Wheel Parts
4WD
ALLDATAdiy
JC Whitney
Off-Road Tires
Dodge Parts


Author Topic: '79 ramcharger fuel sending unit issues  (Read 421 times)

0 Members and 1 Guest are viewing this topic.

Offline R/C-R/T

  • Newbie
  • *
  • Posts: 101
  • RCC Rules!
'79 ramcharger fuel sending unit issues
« on: July 20, 2013, 07:39:45 PM »
Ok, first of all, I couldn't seem to get a good reading with my crapsman multimeter on my fuel sending unit. I had it set on ohms and the numbers were jumping all over the place no matter where I had the float set. So I set the sending unit on a crossmember, hooked the wires from the truck to it, turned the key on, moved the float to about half tank, and nothing, the gauge reads empty.

Then as I was moving the float it started to feel like it was catching, not moving smoothly and PING, the little arm broke off inside the rheostat ( or whatever it's called ).  >:(

So, I either have to try to find a new one, or try to fix this one.

I then tested the (+) wire by turning the key on and using a test light at the sending unit end, and the test light was pulsating - like a directional bulb. Is this right?? I would think it should be a solid light, correct??

Wiring is my weakness, any help would be greatly appreciated. I have a car show a week from tomorrow and I need to get this tank back in and rebuild the carb this week.

Does anyone know where I can find a new sending unit??

Thanks guys.

Offline moparmaiden

  • Full Member
  • ****
  • Posts: 1323
  • Gender: Female
  • I love Lee Michaels...,Do you know what I mean?
Re: '79 ramcharger fuel sending unit issues
« Reply #1 on: July 20, 2013, 09:07:31 PM »
I think it is supposed to pulsate ... I think my temp wire did the same thing when I put a test light on it. I dont know if it's possible to maybe resolder that little arm back on, but sometimes the end of the arm is worn so bad it wont make contact anymore.
Do you have the big plastic tank?
78 Ramcharger 440
72 Rallye Charger 440
69 Polara CHP car 440
68 Coronet street legal drag car 440
75 power wagon 360(currently apart)
72 plymouth satellite 318 (future Petty stock car clone)

Offline R/C-R/T

  • Newbie
  • *
  • Posts: 101
  • RCC Rules!
Re: '79 ramcharger fuel sending unit issues
« Reply #2 on: July 21, 2013, 06:27:45 AM »
Yes, I have the big plastic tank. I was planning on trying to solder it back on this morning, if it works great but it's not going to stop me from putting it back in so I can make that car show. I talked to a buddy of mine and he said his pulsated also when he tested it. So I guess thats the norm - wierd.

Offline R/C-R/T

  • Newbie
  • *
  • Posts: 101
  • RCC Rules!
Re: '79 ramcharger fuel sending unit issues
« Reply #3 on: July 21, 2013, 10:31:32 AM »
Soldered my sending unit together and installed this morning. Seems to work, we will see.

I know this is a long shot but...DOES ANYONE KNOW WHERE I CAN PURCHASE A NEW FUEL SENDING UNIT FOR A PLASTIC TANK IN A '74-'80 RAMCHARGER OR TRAILDUSTER??

Offline daveg

  • Newbie
  • *
  • Posts: 203
  • Gender: Male
  • pull the rods out of the reactor, i want STEAM!
Re: '79 ramcharger fuel sending unit issues
« Reply #4 on: July 21, 2013, 11:43:56 AM »
some speedometer shops rebuild fuel senders
1985 w350 shortbed crewcab (ex-usaf) 360/727/208. only mods: 16" steel wheels and the 4 ham radio antennas

Offline moparmaiden

  • Full Member
  • ****
  • Posts: 1323
  • Gender: Female
  • I love Lee Michaels...,Do you know what I mean?
Re: '79 ramcharger fuel sending unit issues
« Reply #5 on: July 21, 2013, 01:17:55 PM »
Ive been looking on the internet...so far Ive found NOBODY that has one for those trucks :(
Wow, I hope mine doesnt go bad
78 Ramcharger 440
72 Rallye Charger 440
69 Polara CHP car 440
68 Coronet street legal drag car 440
75 power wagon 360(currently apart)
72 plymouth satellite 318 (future Petty stock car clone)

Offline 712edf

  • RCC Rookie
  • **
  • Posts: 409
  • Gender: Male
Re: '79 ramcharger fuel sending unit issues
« Reply #6 on: July 21, 2013, 02:05:03 PM »
Have you checked the gauge first? To do so, unhook the wire (from sender to gauge) where it plugs in at sending unit, then ground that wire. When you turn the ign key ON, guage should peg out at FULL. Don't leave it there but for a second. If it doesn't go to FULL, then gauge is bad or the wiring up to it has an open circuit.

My sending unit in my 75 W600 is bad, but my tank is in cab behind seat.

Bucky

Offline moparmaiden

  • Full Member
  • ****
  • Posts: 1323
  • Gender: Female
  • I love Lee Michaels...,Do you know what I mean?
Re: '79 ramcharger fuel sending unit issues
« Reply #7 on: July 21, 2013, 02:58:36 PM »
Yes, I have the big plastic tank. I was planning on trying to solder it back on this morning, if it works great but it's not going to stop me from putting it back in so I can make that car show. I talked to a buddy of mine and he said his pulsated also when he tested it. So I guess thats the norm - wierd.
I think putting a test light on any kind of gauge will pulsate because there is some resistance...but I could be wrong.
78 Ramcharger 440
72 Rallye Charger 440
69 Polara CHP car 440
68 Coronet street legal drag car 440
75 power wagon 360(currently apart)
72 plymouth satellite 318 (future Petty stock car clone)

Offline comrade cheddar

  • Sr. Member
  • *****
  • Posts: 4540
  • Gender: Male
  • How is that hope and change working out for you?
Re: '79 ramcharger fuel sending unit issues
« Reply #8 on: July 21, 2013, 05:03:57 PM »
Put the two wires in your tank together and your gauge should go to full. If your gauge does not go to full ground the power wire out to the frame rail and see if it goes to fall at that time. That is a quick easy way to narrow down where the problem is.

I have found that the multi meter does keep moving for a while even after the arm stops and takes like a minute for it to settle in on a number.
"The smallest minority on earth is the individual. Those who deny individual rights cannot claim to be defenders of minorities." - Ayn Rand

92 w250 360 TBI nv4500 FED Prison truck
89 R/C Black,360 Magnum, NV4500 manual, D60/HD44 Under the knife as we speak

Offline R/C-R/T

  • Newbie
  • *
  • Posts: 101
  • RCC Rules!
Re: '79 ramcharger fuel sending unit issues
« Reply #9 on: July 21, 2013, 05:15:59 PM »
Thanks guys for the help. I will try these tactics to see where the problem is.  ;)

 

email