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Temp gauge hits normal then drops back to zero when running . I have just put new G E R valve on.

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The EGR valve will have no bearing on the temperature gauge. I would suspect a problem with the temperature sending unit under the hood or a defective temperature gauge.

Posted on Apr 26, 2015

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I have a 02 Grand caravan that has new radiator, termostat, one new fan. the temp gauge goes up to max hot the drops right back down in seconds. what could be the problem?


it could be you have an air lock in the cooling system
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maybe pull the heat sensor. -replace it OR clean it off, reinstall it.

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Intermitant temperature


Check to make sure your thermostat works right by monitoring the warming up of your engine. With a completely cold engine, start and run the engine for a few minutes, then put your hand on the top radiator hose to monitor if and when it gets warm as the thermostat opens more and more and note the gauge reading( if it works) the top radiator hose should be unbearably hot within 5-8 minutes. If the therm. opens right it should close right aswell, staying open a little while eventhough the radiator may have cooled may be what you are experiencing causing the rapid cooling and is nothing to worry about. The Hose should not get warm very soon after starting the engine. Regarding you gauge, lets take one step at a time, verify proper op. or the therm.

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After 15-20 minutes of driving my oil pressure starts to drop when I slow down or stop. It hits zero unless I rev the engine or contine to move. It's fine as long as I keep moving or rev the engine


i had same problem and its just oil pressure sending unit its above oil filter just check it if you got some loose wire or somthing .........my problem was ;i had oil in conector i clean it and works jyst fine

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