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A little advice pleas

714 Views 7 Replies 4 Participants Last post by  skinnysfd
So the truck in my sig the other day starting to have a tick come out of the drivers side on top of the engine. it almost sounds like an air leak but i cant find anything leaking anywhere. so i hooked my smarty up to it and there was a dtc that said cooling fan speed, so i cleared it and it has not come back yet. my mileage has dropped a little bit but not much only like 1 mpg or so. I just changed my fass filter and went with a 2 micron and it almost sounded like the tick got a little bit quieter, so im thinking fuel related. took it to several diesels guys and they all say" never heard that noise out of a cummins but i would have your injectors checked?" So im gonna pull em tomorrow evening. there is a shop round here that will test em for 30 a pc if i pull em. what do yall think? My truck got 132000 an as far as i know they are stock injectors. any help is appreciated.
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If it just started happening all of a sudden, it could maybe be an injector or something fuel-related.

You're gonna be under the cover for the injectors anyway, before you pull any, check and set your valve lash. If they're too loose, you'll find the engine is a lot noisier.

A lot of guys will get meticulous to set all the valves to a "go/no-go" tolerance (i.e. you can fit an 0.010" feeler but not a 0.011" feeler) and some just look to make sure they're not too tight or too loose. I fall somewhere in-between. The ones that were the loosest when I did mine a few weeks back, I took them back to a go/no-go tolerance, the others that were close enough to middle spec, I just left them. It made a difference, and some day when I'm bored I'll probably go back and spend the time to get them all right on the money. It was just too darn hot that day to mess around too long!
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Thoroughbred Diesel has a quick injector swap how-to video on youtube:
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