First my mods are just ets intake, resonated test pipe and dual catback exhaust with cobb flash to stage 2. Sometimes coming to a stop, rpm idles up and down for like 5 seconds then calms down to normal? Does it got to do something with my mild mods?

 

Do you have the intake heat shield installed?

 

I do in fact have the era heat shield that came with the intake. Will that matter?

 

Check the connections on the intake and make sure nothing is loose/leaking.

 

It's related to intake/heat shield. Mine does it as well with my ETS intake.

 

im having same issue. when i want to coast to stop and put in neutral the rpm bounces- i read that its a issue with the intake reading density vs MAF.

Not sure if thats the fix, been too lazy to get it figured out but let know if you do

 

It's normalish to happen... check your connections and all. I have a feeling though that it's the heat shield thing. Mine does it sometimes but it's nothing to stress about.

This will sound silly but... is your a/c on when this happens? I'm sure you know what happens when the a/c is on, right?

 

It doesn't really bother me because it doesn't go that high on the rpm, just a few bump up then back to regular. Usually when ac is on rpm goes a little lower.... it does this more often when ac is off as far as I remember.