High cold idle in drive

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Dec 16, 2020 | 01:33 PM

#31

mharvey500

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So thanks for the input. The upshot of it is the noise is gone after replacing the alternator but the engine light came back on. So nothing as esoteric as noise vibrations causing intake manifold to leak is going on here. The truck is no longer in my purview so it will be the spring before I can look at this again. Thankfully the alternator will not be an issue this winter.

Dec 16, 2020 | 02:55 PM

#32

pawpaw

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From: SW Va

Ok good feedback on replacing the alternator having fixed the noise problem. Let us know how it goes on the come Spring efforts on the remaining woes.

Jan 2, 2021 | 02:23 PM

#33

mharvey500

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Quote:

Originally Posted by pawpaw

Ok good feedback on replacing the alternator having fixed the noise problem. Let us know how it goes on the come Spring efforts on the remaining woes.

So the owner if the truck had his mechanic do diagnostics on the computer and found the cause if the idle problems. I am not able to find out what they fixed but that's not important to the owner as long as his truck works.

Mar 20, 2021 | 07:27 PM

#34

mharvey500

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Ok, so I'm probably going to get the truck back this spring but it has developed a coolant leak right below the water pump. Can this be only the water pump or should I pressure check it?

Mar 23, 2021 | 12:51 PM

#35

pawpaw

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From: SW Va

Quote:

Originally Posted by mharvey500

Ok, so I'm probably going to get the truck back this spring but it has developed a coolant leak right below the water pump. Can this be only the water pump or should I pressure check it?

I see you don't have any replies yet, so if you want to perform some cooling system pressurized leak tests to try & pinpoint the leak source area, maybe consider a UV dye kit that most auto parts stores have. It comes with a UV source that makes it easier to trace the leak source. Using it in low light conditions makes it easier to spot small or weep sources.