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Discussion Starter #1
Hey, I have always noticed this noise and I was wondering if anyone else has this noise. Let me say it is not CSK, the engine has that as well at start up. engine is a 2000 4.8L.

When going up hills or when the truck is in OD doing between 1000-1600 rpm (~45 mph) you can really hear like a pinging/ticking noise. afaik. this engine has done this since day one. what is it? thanks, michael.
 

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does this make sense?

GUYS.....My 01 as well as my 04 has the tick ! Quite annoying
at a drive thru ! All new GM trucks have roller rockers so a
lifter tick is almost impossible.

The tick your hearing is fuel flowing thru the rails and injector poppets.
A mechanic whipped out a stethoscope and let me hear for myself
when I took it to the dealer.
 

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Maybe, I didn't think inejectors were that loud. And if thats the case, why don't all cars with high pressure fuel injection make the sound? :think:

Frist thing that came to my mind is an exhaust leak...
 
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