Frontier 2003 engine running Hot and LEAN - Snowmobile World : Your #1 Snowmobile Forum
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post #1 of 2 (permalink) Old 08-06-2017, 05:54 PM Thread Starter
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Join Date: Jul 2017
Posts: 6
Frontier 2003 engine running Hot and LEAN

I have a 2003 frontier with a problem.
The engine run hot to the point where if the side of the right cabin is not coverd with foil tape it melt the edge of the plastic.
I am not loosing coolant!
I have replace the CO2 sensor, the fuel pressure is 41 pounds and check a lot more thing but my solution look like the TPS is not adjusted properly and it is running lean on fuel.
So I check and I have .530 volt and my Spark plug are gray color.
So I would like to adjust the TPS so that it will run richer in gas to get the spark plug brown and that should make the engine run cooler!
If I adjust the TPS at .520 volt or should I go to .540 volt to make it run ritcher on gas?
also the idle run a bit like vareing bettwen 1100 RPM and 1250 RPM.
By the way except of that running Hot problem, the sled run fine!
Thank you.
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post #2 of 2 (permalink) Old 11-15-2018, 06:43 PM
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Join Date: Nov 2012
Location: Whitecourt,Alberta
Posts: 7
I have same sled. I ran into a guy who added a small radiator up frt with a fan in it. no more heating probems he said.might do that too.
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