2G Coolant temp Overheating Problem

[97eagletalontsi]

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!

 

[pauleyman]

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

 

[97eagletalontsi]

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

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

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

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

 

[pauleyman]

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?

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.

 

[CanadianTalonTC]

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.

 

[97eagletalontsi]

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

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[CanadianTalonTC]

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

 

[steve]

Pulled the plugs and what do you guys think

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.