[Mike Redd]

My vans oil temp gauge gives wandering read outs. It seems to work while engine is warming up then when temps get to about 180 needle will go to 50 then up to 100 then to 0. I replaced sending unit and the gauge. Checked for loose ground. Havn't followed the wiring looking for chaffing. The needle takes 2 or 3 seconds to go up or down. Anyone else has this condition? Thanks

 

[Zbuilder801]

I know this is an old thread but it might help someone else. Mine did the same as all 6 gauges but it was a loose plug that all the ground connects went though. Drove me nuts till I found it. The plug doesn't click together and always stays loose so I had to tie wrap it. I'm lucky it had slots on both male & female connectors.