First off my motor is a rebuilt streetport by Kevin Landers with about 5,000 miles on it. And my turbo's are full non sequential and were just recently put in a few days prior to the oil problem witch i'm about to go into detail about. Also i don't think its the turbo's because they were in really good shape with low miles, so i think they are out of the equation.

The car smoked pretty bad before i put the new set of twins on and didnt smoke at all after i put them on.

About 4-5 days after the new set of twins were on i noticed some oil spots under the car when i was about to leave for work.. Car didn't smoke at all on the way to work, that i noticed.

Well i started up the car to let it warm up before i left to go home like i always do i noticed a bit of smoke come out of the exhaust.. I figured it to be premix because i had just put some gas in the car the night before and used 1oz per gallon instead of the normal 1/2 oz per gal. like i sometimes do. (OMP removed)

Well i go to clock out and by the time i get back to the car smoke is just pouring out now but not as bad as it would when i had the Blown turbo's on the car... Idk why its doing this now but i would like to fix the problem soon because this is my DD. I did a search on the forum here and most common problem i saw with the same related smyptoms my car has was PCV issue, but the guy that put my motor in said i have no PCV?!

Let me know what you guys think because i am lost..


Symptoms:

-Smoke on cold start up's.

-Doesn't smoke with normal driving.

-Smoke's after boost and upon deceleration.

-Dipstick pop's up after boosting.

-Smoke fumes raise from under "Greddy Elbow" and around "dipstick area" after driving under boost and stopping to get out and look under the hood.

-Oil splatter all around "dipstick area" and underneath "Greddy Elbow".

-Oil pressure seems a bit high at idle on cold start (50-55psi).

-Oil pressure at idle drops to normal after driving but still seems high under regular throttle (90-100psi) and (120psi) under boost.

I hope listing the problems might help you guys be able to help me.. I would really like to figure out whats going on here and how to fix the problem. Any and all help would be greatly appreciated!

Thanks,
Zach

 

Try starting your car without the oil cap on. See if you have the same amount of smoke for the same amount of time.

 

1-4 indicate to me that it is a crankcase ventilation problem. The crankcase is being pressurized under boost. Something in the PCV system is blocked or hooked up wrong.

If this is correct, then removing the cap (per the above post) should reduce the smoke.

 

Will do. Its to dark out now, but i'll give that a try tomorrow during the day, and i will also check out the PCV system.

 

On a somewhat related topic, my Silvia kind of does the same thing. If I pressurize my system, via compressed air into the intake tract, and not remove the line that runs to the valve cover, the crankcase becomes pressurized and will blow the dipstick out of the engine... PCV problem?

 

/\ sounds like lack of a check valve in the pcv system. engine was NA originaly right?

 

No, it is an SR20DET. I'm thinking I have a bad PCV valve that is also causing some rough idle issues and low vacuum at idle.

 

What could be possibly blocked or not hooked up right in the PCV system? What to look for..

 

This link may help...

https://www.rx7club.com/showthread.p...il+control+pcv

 

If you do the test I suggested above, that will let you know if it's a crank case ventilation problem or not.

 

If the pcv was deleted when the engine was installed but not vented to a catch can or pack into the intake track this is what will happen. Make sure the two nipples on the oil filler neck are not both capped off.

 

PCV was capped. Problem solved!

Thanks to everyone who helped, there's good ppl on this forum!

Thanks again,
Zach

 

Where was it "capped" at?

 

Oil filler neck.