1999 Integra LS, temperature gauge rises while in idle, but once i get moving, it drops. What could be the cause?

12/8/2007 10:39:11 PM

Radiator fan ain't coming on. Probably a bad radiator fan temp switch or a bad relay.

12/8/2007 10:44:01 PM

^ second

ceck fuse 57 in the underhood fuse box, if it is blown, bad fan motor, if not,

check fuse 17, its the control side of the circuit, if blown, could, be a bunch of things, if not

pull the cooling fan relay, with the ignition on at high temp, you should have 12v on the power and control terminals, continuity to ground on the sensor terminal, and about 8 ohms on the fan one

but more than likely its either the relay or sensor, both are cheap and easy to replace, so if you arent good at diagnosing, it wouldnt be a bad idea to just swap em out


pull the plug off the sensor, and connect the green and black wires, the fan should come on with the ignition on, if it doesn't, the relay is bad if the fuses arent blown, if it does, the sensor is bad, the sensor is on the water outlet neck by the intake hose

[Edited on December 8, 2007 at 11:01 PM. Reason : ]

12/8/2007 10:58:54 PM

thanks guys!
appreciate it!

12/8/2007 11:05:22 PM

check the coolant yet?

12/8/2007 11:24:02 PM

integra?

ill buy!

12/8/2007 11:45:38 PM

^
errr no.
^^
yea coolant is fine, no leak.

12/9/2007 9:13:49 AM

try bleeding you coolant system

12/14/2007 7:25:53 PM

whoa there pal. not so much info in one post ok

12/14/2007 10:37:53 PM

I had a very similiar problem with my 96 accord... it turned out that after 120k miles my coolant was running low... I had just had it serviced so I figured that they would have checked the coolant level... but it actually wasn't one of the included things... so it would overheat whenever sitting still but run fine whenever moving b/c it had a little bit of coolant in it... I added half a gallon of water to it and never had another problem... (I felt like the dumbass I was... this was 4 years ago now)

12/15/2007 12:09:31 PM

yea my water level was low, though the coolant resevoir is full, got it fix!

12/16/2007 10:10:30 AM