96' Overheating and Idle
My grandpas corvette is having issues with overheating (antifreeze boiling) and an idle issue where it wants to jump and fall quickly. The temperature also climbs rather quickly, trying to exceed 230. We took it out for a drive and got it warm, the temps started climbing a little higher than what they are supposed to and the idle when we put it in park was bouncing probably between 1-3k rpms. We drained the anti freeze and put some more in and when we cranked it back up it started boiling and the temp gauge hadn't even exceeded 215 degrees. We turned it off to let it cool and then cranked it back up to move into the garage, it started backfiring which its never done. Needless to say I'm clueless on what the issue could be. We are pretty sure all the vacuum lines are sealed.
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Originally Posted by CJX
(Post 76024)
My grandpas corvette is having issues with overheating (antifreeze boiling) and an idle issue where it wants to jump and fall quickly. The temperature also climbs rather quickly, trying to exceed 230. We took it out for a drive and got it warm, the temps started climbing a little higher than what they are supposed to and the idle when we put it in park was bouncing probably between 1-3k rpms. We drained the anti freeze and put some more in and when we cranked it back up it started boiling and the temp gauge hadn't even exceeded 215 degrees. We turned it off to let it cool and then cranked it back up to move into the garage, it started backfiring which its never done. Needless to say I'm clueless on what the issue could be. We are pretty sure all the vacuum lines are sealed.
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Replace the T-stat, pressure check the radiator & cap.
If all looks good and still an issue, pull spark plugs & run compression check on each cylinder. |
Originally Posted by CJX
(Post 76024)
My grandpas corvette is having issues with overheating (antifreeze boiling) and an idle issue where it wants to jump and fall quickly. The temperature also climbs rather quickly, trying to exceed 230. We took it out for a drive and got it warm, the temps started climbing a little higher than what they are supposed to and the idle when we put it in park was bouncing probably between 1-3k rpms. We drained the anti freeze and put some more in and when we cranked it back up it started boiling and the temp gauge hadn't even exceeded 215 degrees. We turned it off to let it cool and then cranked it back up to move into the garage, it started backfiring which its never done. Needless to say I'm clueless on what the issue could be. We are pretty sure all the vacuum lines are sealed.
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