hi,

i have been noticing a pretty loud popping sound from under the car when i shift gears mostly 4th and 5 th and a few times 2nd gear and when i let go the clutch and start to accelerate slowly, i hear a pop from under. also my check engine light comes on every time i drive in very wet weather but it turns off when dry.
i could say that the sound is like a baloon pops and it happens mostly when im in low speed and drive in 4th or 5th gear( 40 mph).

any advice would be appreciated.

05 evo 8 gsr
370 whp 355 tq
dynoflash tuned.

 

kind of bold statement,
what kind of bov do you have?
check for boost leak?
when last time change spark plugs?

 

forge bov. why would you think the bov have anything to do with a sound coming from under the car towards the back?????

 

just trying to min some problems that it could be.

also i would check see if your running rich or lean. but a good amount of evos that is any car when they shift they popp at high rpm

 

backfire?

you ever have someone drive behind you at night?

 

hehe change plugs gap them to like 22 see what happens then

 

Yes gaping the plugs tighter is a great idea

Alsoa boost leak test

 

exhaust leak before the cat? can cause CEL's and popping noises. :shrug:

 

thats what i was wondering too. thanks i will check the exhaust leak first before i do a boost leak test.