stc and non stc injector timing and symptoms

[@scottreed5460]

Not sure if you still monitor this channel but man do I have some questions for you. I have my first BC4 and I have been wondering what those things were on the richer box with the stainless braided line coming from down under the cam follower covers. I was just about to run the overhead but now I think I’ll wait to see if you respond. I am super familiar with the BC3 but not this. Runs amazing but jake’s are almost solely noise which is rare for a BC. Thank I for your post, can’t wait to see if you respond, thx…!

[@staym925]

I got a question, i have a cummins nhc 250, 855 and it won't idle under 1300, at start up it will idle at 600 for 20 seconds, then jumps up to 1300rpms and stays thier. I adjusted idle at pt pump, I've turned down 3 times, and each time idle at 600 then jump up, adjusted again, idle at 500 then jump up on its own, adjusted again, idle at 500 and jump up to 1300 rpms, i can shut truck off, start up and idle at 600, then 20 seconds it jumps up to 1300 on its own and stay right thier. I'm not sure, it don't act like getting air, because don't stumble at all, everytime I start it, it starts right up, no hesitation.

[@countryboysteve]

pt pump needs rebuilt the afc will leak internally or fuel control valve gums up causing it to run away. extremely common on pt pumps

[@JoseRamos-o6l]

I didn't get what gaskets you talk about on minut 11:00 whare do day go or can you explain me more thanks

[@scottreed5460]

Old vid I know but he was referring to the cam follower gaskets. It sets the timing on these engines… the thinner the gasket the faster the injector fires and longer it fires. Thicker the opposite

[@xxxmikeyjock]

the gasket is more of a thickness shim. it changes where the roller on the cam follower contacts the cam

[@woodb69n]

I got this same exact issue going on except this one lopes excessively through to 2100

[@ronaldrussell5481]

You are confusing "top stop" injectors with "stc" injectors. STC, or "Step timing control" has the "box" on the side of the engine and the injectors have a "hydraulic lifter" type link. Top Stop injectors were used in non-STC engines, Big Cams and their purpose was to momentarily unload the injector for lubrication purposes/camshaft life.

[@Generatorservicemyanmar]

I am myanmar Thankyou

[@Generatorservicemyanmar]

What it is red hot turbo an exhaust