RPM Surge at idle...

[Rollin Thunder]

Only seems to do it when I first start it and if its wet or humid out. It will serge between 400 rpm and 800 rpm. just up down up down up down. I shift out of park and it stops and does not do it until our next humid day or rain storm. No idea why its doing this.

 

[Rivieraracing]

Clean out your throttle body, not saying that is the reason, but probably dirty and might solve your problem!!

 

[mike03tahoelt]

yeah mine was doin the same thing but all the time its always humid in florida i cleaned the throttle body and seafoamed and its gone

 

[DenaliAK]

For a complete non-mechanical type like myself, how does one clean the throttle body? (or even find it?)

 

[BlueTahoe2001]

RT, I am having the same problem. I think it may be the Vacuum piece. Can't think of the exact name right now!

 

[Rollin Thunder]

For a complete non-mechanical type like myself, how does one clean the throttle body? (or even find it?)

I think its the thing under the vortec cover.

 

[BlizzardX23]

In simple terms, its the round metal piece that your intake tube connects to..going to the engine

 

[DenaliAK]

lols...thank you. Sounds simple enough. I'll look. I'm having a surge issue as well, but mine is at speed.

 

[mike03tahoelt]

just pull the big tube going into the middle front of your motor spray some carb/throttle body cleaner have someone hold the throttle all the way down with the car off and wipe with a rag