03-31-2010, 12:47 AM
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#10 |
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Supra Forum Moderator
Join Date: Nov 2009
Location: Green-Ohio
Posts: 1,297
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is it cold only missfire?
The leak may occur only as the engine cools down alter it's shut down, or it may be continuous. Either way, the leaking coolant enters the combustion chamber while the engine is off. This fouls the spark plug, causing the misfire during the engine's first cold start. Once the plug has a chance to clear itself and begin firing, the misfire goes away, but not before the misfire code is stored. If any more coolant continues to leak as the engine warms up, it's burned because the plug is no longer fouled. I would suggest renting a rad pressure tester or go buy one for 60 bucks from harbor freight. pressure the rad system according to the psi on the rad cap (13 max) and see what sprays! good luck
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