Ring free is a product that loosens the carbon buildup on rings allowing them to reseat. Commonly used on two stroke outboards.
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They good folks will prob honor warranty without card. I was blowing the little fuse in fuse box never did figure it out just put a 10 amp in instead of 5 but I talked to them at that time they said if my pump was bad would replace no charge I have a 4g its about 2 years old.
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Doesn't matter, that pump is fragile, ANY trash get in that system between filter and pump, it could take it out.... those pumps will fail with no warning especially the 2011-2013 lml's
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Gonna need to find a way to watch desired rail pressure and actual rail pressure while cranking.... if your still running cp4 pump it could have just took a dump...... should have swapped that when was down for gaskets...just sayin
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If you have a leak on your injector return lines it will not start needs at least 80 psi of back pressure on injectors before they will open on a lml...... what I'm getting at is if you developed a leak while driving on return side would lose pressure when you shut it off
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