I Have Two Tacho's

[msports180]

Hey guys, im having a complete brain f#@k with my car at the moment.

The temp gauge seems to have a mind of its own, i dont know whether its a real reading or not.

Basically whats happening is, when i drive it the temp gauge starts to read hot, put my foot on the clutch and give it a free rev and the gauge drops back to normal almost instantly. Start driving again and it goes hot, turn the lights on and it goes hot, turn em off and it comes down. It dosnt get hot driving round town with the A/C on only when im going up the big F@#K off hill up to my work and cruising for a while at 110km/h.

Im thinking it has to be electrical, as im also having problems with the Attessa, the 4wd light is basically on 24/7, oil level is fine and its not showing any faults on the LED (assuming the LED aint blown!). Sometimes the light stays off, turn the lights on or A/C on and it comes on, Makes me think maybe an earthing problem, as my engine bay has been resparyed ETC maybe its not getting a good contact, i havnt checked yet as the stock earthing point is buired under the intercooler piping. (gonna check this next day off).

If its something to do with the cooling system, maybe thermostat jaming? Or engine fan not working?

I have orderded a hand controller for my PFC so i can check the sensors as im getting a bit pissed with this.

Any idea's muchly appreciated!!

Cheer's.

[rb30dett]

I think your on the right track sounds like an earth issue.

[chook]

+1 for earthing problem, I recently removed my earth lead, and sanded the engine and body contacts. If you have access to something that will read your coolant sensor (not temp sensor), eg ECUTALK, or PFC i guess. you can monitor the temp and compare it to what your gauge is showing, as they are separate sensors.

Talking about temp gauge, I just bought a 2nd hand instrument cluster from japan, $25, as Nissan no longer list the temp gauge, as i discovered with much testing on and off the car, and replacing of sensors, that my temp gauge would sit in the same position (about 1/2 way) from 70 to 120 degrees, then resume. Not real handy. Guess it must have either broken some windings inside or worn a rut in the windings ?? Anyway, hope the new gauge doesnt have this issue.

[msports180]

Thanks for the fast replys guys!!

Hmm earth seems to be the main suspect. Finish night shift 2moro morning, after a nanna nap im onto it.

I didnt know the gauge and ecu used diff sensor's?

Thats a very handy reading!! Im not sure on the workings of the gauges.

I know with my wifes R34 GTT when it got hot once the A/C turned its self off, with my stagea even with the gauge was showing on the H line A/C was still cold.

Edited January 27, 2009 by msports180

[msports180]

It was the earth!!

Took every earth point off, rubbed em back and smashed em back on. All sweet now.

Attessa working, temp gauge being normal, everything works beter.