Well first of all HI, been a while, had my car stoped for 4 months cuz tranny took a dump, got it fixed! woo hoo! And got my first kill a few days later! Mazda Speed6, smoked it really bad.. Anyways this week I went to the track, the car wont and I repeat WON"T grip, just real bad tire spin I tried everything but I guess it's the tires I got some cheap tires so I can't expect much. But thing is when I do get grip at 2nd at like 5k it's all good till the EGT reaches 14k and then it goes crazy! jumps to 24k and then back to zero. I got off the gas and it just goes back to normal around 12k.... Wierd! I asked a friend and he told me it could be that it isn't well grounded..
what do you guys think?

Sounds to me like you have a bad sensor/probe. If it worked fine before then clean up your positive and neg conns to the gauge and consider replacing the probe. TRE makes a nice one thats only 45.00 last i checked. The probes dont usually last that long to be honest with you.

Check the ground for sure. If all wiring is good, replace sensor. Probably ground.

Originally posted by wickedtalon
Check the ground for sure. If all wiring is good, replace sensor. Probably ground.

I had an issue with a bouncing needle ALL the time, it would never stay steady, and that was due to a bad ground. I grounded it right to the battery post and it was fine since. But since yours doesnt always bounce around, could be the probe like ^^^^ said, or a simple ground as well.

Glad to see your back up and running though and already back out to the track!

You guys really get egt's of 14,000? Wow how does that work? Now is that fahrenheit or celcius?

Well thanxs for the info I will try to replace the ground, and check again I hope is that, if not well... Anyways I got my AEM wideband that just arrived on friday can I dish the egt and just use the wideband?
I was hoping to leave them both but in the case the probe is dead..

Originally posted by bullettdsm
You guys really get egt's of 14,000? Wow how does that work? Now is that fahrenheit or celcius?

I thought the exact same thing when I read it... Maybe there's a currency exchange or something...


on a more serious note: I also have to agree, first check the ground, then the sensor. If you have it grounded to the body under the dash somewhere you might have a ground loop problem also so try directly to the battery first, then spend your money.