[JoNaH]

*Update, just got the codes read and it says cylinder 5 and cylinder 6 misfire, is that a spark plug problem or more serious? I'm starting to think it has nothing to do with the intake and bov**


I installed the dual cone intakes and a Greddy Type S bov today, everything went fine, but after starting the car, I'm hearing a small knocking sound from the engine and the bov is working incorrectly, only thing I suspect is my vacuum because the vacuum line is not 100% tight on the small plastic nipple on the car, would the vacuum cause that? Please give me your input, I can't drive the car right now! I sealed up the places where the old dv houses were and the spot next to the bov also

[fun2drive]

Yes your BOV relies on that so you need to fix that leak before it will work correctly...

[JoNaH]

Originally Posted by fun2drive

Yes your BOV relies on that so you need to fix that leak before it will work correctly...

I will try and get new hoses tomorrow for it

[Todd135i]

Also make sure you're connecting the vacuum hose to the right nipple on the BOV. The type S has 2.

From experience, I'm not a fan of the Type S. you can get all sorts of issues (flutter, Etc) if the adjustment screw isn't properly set.

[JoNaH]

I'm getting a unsteady/ fluttering rpm when i rev the car, is that from the BOV not being adjusted properly?

[JoNaH]

I installed the stock diverters back on and still getting the same problem, car shakes a lot at idle and no steady rpm, then shakes very bad at acceleration while lagging very much and not accelerating properly, also got a service engine soon light. Anyone have any input?

[marv85]

Originally Posted by JoNaH

I installed the stock diverters back on and still getting the same problem, car shakes a lot at idle and no steady rpm, then shakes very bad at acceleration while lagging very much and not accelerating properly, also got a service engine soon light. Anyone have any input?

Read codes, that should shed some light. is the car building boost? is it releasing boost to atmosphere through the diverter valves (make sure you put them back correctly)

[JoNaH]

Originally Posted by marv85

Read codes, that should shed some light. is the car building boost? is it releasing boost to atmosphere through the diverter valves (make sure you put them back correctly)

put them back on correctly, can't really get codes cleared until wednesday, unless discount auto parts can read codes!

[JoNaH]

the stock dv's are back on correctly, only thing different is that i got the dual cone intakes on and thats it yet the car still driving like crap, will clearing the codes make this problem go away?

[JoNaH]

just got the codes read and it says cylinder 5 and cylinder 6 misfire, is that a spark plug problem or more serious? I'm starting to think it has nothing to do with the intake and bov

[marv85]

Originally Posted by JoNaH

just got the codes read and it says cylinder 5 and cylinder 6 misfire, is that a spark plug problem or more serious? I'm starting to think it has nothing to do with the intake and bov

The easiest way to test this would be to start with swapping coils and see if the misfire follows that coil. If it doesn't, the next suspect would the plugs and finally the injectors.

I find it weird that you didn't have any misfires and suddenly they appeared after trying to install a BOV.

below is a clip by COBB detailing misfire diagnosis (excluding injectors)

[JoNaH]

Originally Posted by marv85

The easiest way to test this would be to start with swapping coils and see if the misfire follows that coil. If it doesn't, the next suspect would the plugs and finally the injectors.

I find it weird that you didn't have any misfires and suddenly they appeared after trying to install a BOV.

below is a clip by COBB detailing misfire diagnosis (excluding injectors)

thanks for your help, I'm going to try that tomorrow