Rough Idle and Screaming nose from engine ? PT II

[240sxdreamboy]

Ok So im a noob at this stuff but anyways here is the story

Got out of high school coming home there is a big hill on the way I go home so I go over the hill and at the top of the hill I come to a complete stop when suddenly my car starts to shake like crazy and a screaming nose from my engine when My rpms are low :/

When I got home I open the hood (with car off) and I hear a hissing nose like if air is escaping some where from the engine , I check my oil and its ok, Check my cooling/ anti freeze and put more in waited for another 30 mins turn my car on and it does the same thing again :/ (About to cry cry) But I turn the car off and now I hear no more hissing .. Im so lost and confuse help a kid out guys lol this is my only car I got :/ :sadwavey:

So I found out this thing broke -> IMG_20110902_180853 | Flickr - Photo Sharing! (http://www.flickr.com/photos/[email protected]/6107307497/) Could that be my problem and how much would that cost me Minus the labor Ill fix it my self in auto Class

[pogstar]

that's your pair/aiv valve, it's for emissions. I removed that whole setup and just plugged the vacuum lines and the line coming off the exhaust

[Hashiriya415]

You don't need it. All it does is heat up the cat when you start your car cold, that is the only time it works.

[240sxdreamboy]

You don't need it. All it does is heat up the cat when you start your car cold, that is the only time it works.

so guys thats my problem right ? that lil thing ? LOL :picardfp:

[240sohc]

You don't need it. All it does is heat up the cat when you start your car cold, that is the only time it works.

agreed...you only need it for smog. however, the pair valve is supposed to send clean air into the exhaust to help lower the NOx emissions. if the pair valve gets dirty it can introduce exhaust back into the intake causing rough, roaming idle, bogging, and stalling at low rpm. so you can clean it up or just remove it and plug up the bung on the exhaust pipe. nissan dealer even sells the plug.

[Hashiriya415]

^ Don't need for smog. It only operates when car is cold to warm up the cat. There is no smog that tests that, it's just visual.

[240sxdreamboy]

^ Don't need for smog. It only operates when car is cold to warm up the cat. There is no smog that tests that, it's just visual.

now this Green stuff start coming from the top of the engine ? Does that means my engine is blown ? Wtf Ill link a pic as soon as my phone chargers up

[pogstar]

headgasket!

[slothonaleash]

That green stuff is coolant. Your headgasket seems to be blown.