i just had my b16 motor rebuilt with je pistons and eagle rods, it has a block guard, aem fuel pressure regulator, venom fuel rail, 550 rc's, 255 walbro, t3/t4 50 trim, tial wg, tial blow off, a big fmic, i replaced the water pump, oil pump, timing belt, and i am running the stock head for now when i took the head to a machine shop they said it looks fine and i had it resurfaced. now it starts and runs but it sound real lopy like it has cams and it is pissin out steam and air from the breather on the valve cover?? and suggestions on this problem? could it be a maybe a tune but i dont wanna take a chance on blowing it if it aint right inside. any info would help thanks

 

well oil vapor is what usually comes out of that vent, build motors or turbo motors on boost often more fumes coming out, but you say steam which is water, did you mean to say oil vapor?

 

Oil comes out of that breather if you dont have that routed any where.(catch can, or a breather filter...A simple catch can setup would fix that...

As for the idle have you check for vacum leaks? This can cause idle to sound like you have a cam.....Also if the car doesnt have a proper basemap that could cause bad idle

 

the car was tuned for the stock motor on 11 lbs so the ecu is programed for 550 rcs and a 255 but that was higher compression. someone was telling me that since it has lower compression now it might make the car louder like it has cams could that be true? i will check tomorrow for vaccuum leaks maybe something came off thanks

 

no, definitely not. if oil is coming out of that breather hole you have a serious problem, like a blown motor or SERIOUS blowby issues which are usually a blown motor.


sounds like you are running on a pretuned ecu. You need to have your car dyno tuned.

 

Blinx9900 speaks the truth. if youre having problems like that you might wanna figure out whats causing them. and on the idle issue. my car idled like that from simply switching from a ramhorn manifold to an inlinepro. you need to get your car retuned anyway if the tune is for a stock bottom end......

 

head gasket i had nasty blow by and smoke blowing from my valve cover and crappy idle, compression was 95,80,120,65 replaced the head gasket and fix all the problems....ive seen guys put them on backwards and upside down dont ask me how but its been done

 

so white smoke coming out of the valve cover breather is consider a blown motor? mine have white smoke coming out.

 

well a ton of blow by (white smoke) out of the valve cover means a cracked ringland. which wouldnt make sense in his case as it sounds like a new motor.

 

what can be the problem. i would like to know too. could it be because of the type of rings being used since this is a new build motor?

 

those je pistons are gonna have a lot of blow-by when you first start the motor. Let it run for a minute or two and see if calms down

 

Bad Pcv

Bad rings Or Broken ring lands. I had the same thing happen last yr and it turned out to be a busted ring land on one of the cyl.