I have a 1992 Dodge Ram 350 pickup, I'm having problems with the engine temperature. The temp gauge will read extremly hot then when i stop it will read very cool after the truck has been running for a while and i know its not that cold. I have replaced the thermostat and it sounds like the sensor to me but i can find it. Can anyone help me and tell me where the coolant sensor is located?

it is on the driver side of the back of the head its sort of set in the back of the head

94cummins12v's Sig:

91 f350 crew cab 12v cummins,nv4500 ,E/F shift handle w 2low and pacbreak switch, 4" straight pipe Dual 5" bullhauler stacks, Industrial injection 370 injectors and super phat shaft 62/71/14, #100 fuel plate, 4k GSK, ARP studs,60lb valve springs,custom 191 dv's, timing 16.5*,13" ceramic valair 6sp clutch, AFE intake, custom water/meth, custom air bags, 7 guages.

Yep 94 cummins got it! I would check your body ground from teh battery to teh radiator core support, when they go bad the gauges seem to run funny. Try running a heavy gauge wire from the negative on the battery to the core support and one to the block, also run one from teh block to the firewall or frame. Teh ground wires are kinda small on these trucks and give you all sorts of crazy problems.

RSWORDS's Sig:

DIESEL BOMBERS SUPER MODERATOR

CLICK HERE FOR SPONSORSHIP INFORMATION
CLICK HERE TO BECOME A PREMIUM MEMBER AKA BOMBARDIER
___________________________________________

yours is a little different cuz i've got a chevy sensor in mine, but should be in the same spot. The rear most valve cover is on the top of the pic, its back and down from it.

Attached Images

temp.jpg (66.5 KB, 11 views)

FastCR's Sig:

1995 Chevy K2500 Extended Cab Long Box P Pump 12 Valve + NV4500 + Military 37s
215s, No fuel plate, star wheel all in, WG shut, Southbend, stacks, some other stuff
'08 LMM 6" lift, 35's, blacked out, etc. (dads)
'02 VW Jetta TDI (All stock except deck)
I got a pocket full of bread a girl givin' me in the back row at the movies

that would be it. Fu#er is a pain to get out with the head still on the trcuk. its 3/4" pipe threads