every now and then my egt gauge needle starts to bounce all crazy. what could this be?

bad ground probably.

I had that same prob. Found out the wiring fot the EGT under the hood burned or rubbed open and it was grounding out.
Hope that helps
DJ

If it is autometer, could be from heat. I know I had this problem with their probe, and I used some oil hose to cover it. Fixed it!

I have greddy now and I have NEVER experienced the bouncy gauge phenomena. and I don't have the probe wires covered or anything.


-------jezreel
1998 GS with hrc stage 2, sfmu, ml, prokits, Greddy warning gauges: egt, boost gauge, and oil pressure, apexi tt, haydans tranny cooler, costum dp, groundwires, dynotune fp gauge. gst muff, turbo spoiler
Boostin since Aug 03.

nothing like driving with the windows down and the music low: i love hearing the turbo spool, swwwhhhttt!!!!
thanks for www.kaptainmyke.com for the sig hosting :thumbsup

yea mine ges this too, I have check the ground/power connnections and all is well there, I'll try covering it with something, see if that helps.

i cooked my egt probe the other night and since then i've had the same issue. i know my power and grounds are good as well so does a probe just go bad? its an autometer one is there a better replacement that we should be lookin at getting?

I replaced my autometer probe with a team rip one.

http://www.teamrip.com/accessories.html

I had the same problem, it was because my egt probe wire got burned on the EGR valve pipe and it would bouce on the egr pipe shorting the exposed wire making the needle jump around.