Anyone having trouble with WVO tank sending units? - Diesel Forum

TravisT · 12-21-2005, 03:51 PM

This is the second sending unit that has failed. They are from Tempo. What happens is the gauge will not receive a signal and reads empty. Then while driving and when the oil sloshes around, it will intermittently bounce to the proper reading and then back to empty. I have replaced the lead wires, and that wasn't it. I've added a beefy ground wire to the tank, and that didn't help. I've bridged a ground wire to the ground tab on the sending unit and it did nothing. I bridged a ground wire to the positive lead on the sending unit and it jumped the needle to full. So, I know it's not on the positive side. The leads on the back of the gauge are all proper, tight, and insulated. I can't think of what it could be. Is the WVO tearing up the actual sending unit? Or can you think of a way that the electrical circuit is being broken somewhere? [img]/ubbthreads/images/graemlins/shrug.gif[/img]

Maybe I'm the only one.

freds · 12-22-2005, 11:21 PM

I don't think they can take the heat. Mine works fairly well above 1/2 of a tank, but bets are off below that. Sometime it does and sometime it doesn't.

Since I process my oil in about 30 gallon batches for a 60 gallon tank I basically just need to know when it can take a full batch.

fordnut74 · 12-23-2005, 10:20 AM

Travis- Check THESE out by ISSPRO. They are a solidstate fuel sender and have worked well for me so far(fingers crossed). I have even called them and they said should work fine with oil, no problem. [img]/ubbthreads/images/graemlins/biggrin.gif[/img]

TravisT · 12-24-2005, 12:11 AM

[ QUOTE ]
Travis- Check THESE out by ISSPRO. They are a solidstate fuel sender and have worked well for me so far(fingers crossed). I have even called them and they said should work fine with oil, no problem. [img]/ubbthreads/images/graemlins/biggrin.gif[/img]

[/ QUOTE ]

Hey thanks for the tip FN. I'll make the change.

I've been hearing good things about your design. Good work! I wish I paid more attention last year when it was being talked about. I take it your home safe?

JOAT · 12-24-2005, 10:42 PM

I had trouble with the first Tempo sender I had, but the warranty replacement has been fine for thousands of miles. I wonder if they had a bad batch or something? The first one never read accurately or consistent full to empty but the replacement does. So a defect is likely for the first one in my case at least.