Poping sound?
 

Just took the civic for a drive for the first time. Boost comes on at like 3000rpm or abit less.

Only problems are when it idles , it makes a poping sound from the exhaust.. Only thing i can think of is to check the timing which ill do asap.

Other thing is at bout 5000rpm, itll start to missfire etc.. VTEC isnt engaged yet so its nothin to do with that.

Only thing i come up with is
A) The tune itself (xerocens tune)
b) Timing is way out?

Anyone got any suggestions?

Thanks

Re:Poping sound?
 

try gapping your plugs around 30 or even lower 25.. we had that problem on both of my friends cars until we did that.. and it also stoped poping if we added lots of timing.

Re:Poping sound?
 

30??

.30mm's?? :o

Is that what you mean?

Re:Poping sound?
 

.30 inches...that's about exactly 0.762mm

Re:Poping sound?
 

the pooping is a side effect of the big injectors and retarded timing.

Re:Poping sound?
 

Ok.. so its not actually doing the engine any harm is it?

Re:Poping sound?
 

No, but it's sometimes annoying when you just want to drive easy and not atract attention from the cops when running only with the downpipe ::)

Re:Poping sound?
 

can someone describe this popping sound a little bit more.. is it a backfire sound?

Re:Poping sound?
 

Ill try get a recording of it.

But yeh, it is sorta like a back fire, but the engine revs dont really get effected by it.. It does it all the time.. Im trying a couple of new maps, as the current one makes the car run like ----.

Re:Poping sound?
 

It is a backfire sound....it doesn't sound really loud, you hear it alot when slow down or when you down shift and slow down....when I downshift and slow down I would get a real backfire and flames would shoot out my downpipe ;D....At night it looks like a fireworks show ;D