Engine/Transmission (1998.5 - 2002) Engine noise

[cmills]

when I get the RPM between 1500 and 2000 and hold it there for a couple of seconds, like when I am driving in 1st or reverse for a little bit, the sound of the engine changes, it kind of gets louder but it actually sounds like there is more moving parts inside, I wish I could explain this but that is the best I can do, anybody have any Ideas?

 

[ToolManTimTaylor]

Sounds like to me what mine does. Light throttle and when engine speed and rpm seem to match road speed it sounds like the fuel curve changes to sustain a light engine load. Just a guess but that's what I can equate it to. Kinda like going from normal clatter to tossing in . 70 cents worth of dimes into the mix.

 

[cmills]

thanks for the reply Tool Man, the weird thing is, is that it never did this until I got the engine rebuilt, anyway I guess it is nothing to worry about then, I only wish I could describe it better.

 

[ToolManTimTaylor]

Kind of like driving along with a light steady throttle and once she is up to speed and someone flicks on the rattle switch?

 

[cmills]

Yeah, and I never notice it unless it is in that rpm range and kept constant for a couple seconds.

 

[wtfd6]

i know exactly what you mean. mine has been doing that also. seems like just since it got cold out. mark

 

[cmills]

You know I never thought about the temps outside I just got the engine rebuilt late last summer and I can't remember if it was doing it when it was warm or not I'll have to wait til spring and find out, I do know however that it did not do it before it was rebuilt