Read temp from a scan tool. See if gauge agrees. The bouncing really points the finger. Bad connection? Bad harness/wire? Investigate.

pauleyman said:

Read temp from a scan tool. See if gauge agrees. The bouncing really points the finger. Bad connection? Bad harness/wire? Investigate.

Click to expand...

I replaced the wire it did break before and had to fix it.

pauleyman said:

Read temp from a scan tool. See if gauge agrees. The bouncing really points the finger. Bad connection? Bad harness/wire? Investigate.

Click to expand...

Would you rule a headgasket out? Due to it not over heating all the time?

97eagletalontsi said:

I replaced the wire it did break before and had to fix it.


Would you rule a headgasket out? Due to it not over heating all the time?

Click to expand...

I wouldn't rule out anything without testing. You need facts not speculation. Seems unlikely as an educated guess. I'm not convinced you even overheated. Verify. Don't guess.

How low was the coolant? Generally a bouncing gauge indicates air in the system. When you topped it up did you bleed it? Are you pushing coolant? Why was it low? Leaks?

Coinciding with hitting bumps though as Pauley said could definitely be a connection issue. The ECU and gauge use 2 different temp sensors so once again, like Pauley said check with a logger and make sure you are actually seeing the same thing the gauge thinks. If I remember correctly, the smaller one with a singular wire is the gauge sensor at the thermostat housing and the larger one is for the ECU.

I posted about my car bouncing the temp gauge and only over heating up a hill. Pulled the plugs and what do you guys think

You should keep to a single thread for clarity on a single issue for better responses.

97eagletalontsi said:

Pulled the plugs and what do you guys think

Click to expand...

Other than they aren't the recommended spark plugs I'm not sure there is anything about the plugs we could say related to the overheating problem.

97eagletalontsi said:

So the other day I was going up a hill and the car started to over heat then when I went to flat ground it cooled down, when I hit bumps the coolant gauge bounces, I checked and topped off the coolant level, then a few days later my alternator went out. Not sure if that has any effect on it, but it was doing it way before the alternator went! Any help would be great!

Click to expand...

Mostly u had a small leak in the pipe behind the exhaust manifold.. at the end of it the alternator seats below it.. coolant leaked and destroyed the alternator.. this will explain ur missing coolant n the alternator..

It happend to me