Valve noise?

[NUKEMAN]

Lately I've been hearing what sounds like vlave noise or possibly timing advance/retard noise in my '03. Can only be heard as the engine drops RPM's, like between shifts or after a quck stab at the throttle as it drops back to idle. An example is if I rev it out to 2k, then let off the throttle, it will make the noise briefly about 3 or 4 times before it comes back down to 750 RPM, like the timing is advancing then retarding. It just started as I crossed over 70k miles; haven't added any mods, and no CEL or codes.

 

[MMeier]

Sounds similar to mine, is it more pronounced when cold? I'm thinking that with 188k hard miles and running stacked boxes, mine might be in need of new injectors itself.

 

[steved]

Lately I've been hearing what sounds like vlave noise or possibly timing advance/retard noise in my '03. Can only be heard as the engine drops RPM's, like between shifts or after a quck stab at the throttle as it drops back to idle. An example is if I rev it out to 2k, then let off the throttle, it will make the noise briefly about 3 or 4 times before it comes back down to 750 RPM, like the timing is advancing then retarding. It just started as I crossed over 70k miles; haven't added any mods, and no CEL or codes.

Mines been doing it for a while... if you place a screw driver or mechanics stethescope on the crossover tubes for the injectors, they will be very noisey. I agree with MMeier, probably just "worn" injectors... however, I'm not sure whether it is a problem or not as I have read a lot about it recently.



steved

 

[NUKEMAN]

So could this be considered normal? Meaning it isn't something to be concerned about? I forgot to mention in my original post that it is definitely more pronounced whren cold, but is always there warm or cold.

 

[steved]

So could this be considered normal? Meaning it isn't something to be concerned about? I forgot to mention in my original post that it is definitely more pronounced whren cold, but is always there warm or cold.

I have 50k on my noisey injectors... this truck hasn't been quiet for a while now... I'm not going to worry about it until it breaks.



steved