So could a malfunctioning PCV valve cause an extream smoking problem?


BTW new FD PCV valve's are expensive I paid 29.35 for a new one.

 

Possibly.

Hope you didn't buy a new PCV valve - the stock PCV valve is useless. In '95, Mazda ditched it - cap off the nipple on the oil fill neck and the nipple on the intake manifold to go '95 style. That leaves the hose that points straight down on the oil fill neck, which vents to the primary turbo inlet. That does all the work the PCV system needs.

Dale

 

Related thread:

https://www.rx7club.com/showthread.p...+control+rings

Dave

 

Yeah Dale I bought a new PCV valve, did'nt know about the 95' set up. But hey I just spent 1200 on rebuilding the motor and was told it did'nt need to be rebuilt after it was done and still smoking so whats another $30 right. I also found a bad chack valve but picked up one a NAPA that should work.
Thanks Dave for the reference. I'm going to use it also.

 

I just had this issue with one of my fds, it would only smoke after you got into boost and then let off. Not during boost, only after as teh engine is pulling a lot of vacuum at that point. I deleted it and the issue was resolved immediatey.


I think I met you at Landers place when you brought your engine if this is the same person, I know you replaced the turbos with another used set. When diagnosing a smoking fd you culprit is 95% of the time the twins.

 

Yep Dave I'm the guy you met (was a fun trip). My FD smokes while sitting at idel. Smakes bad too. Runs ok I need to start it up now that I have a new chack valve and PCV. Might do that today.
The turbo's might be the problem we'll find out soon enough.

 

I decided to say "**** it" and brought it up to a local rotary shop to see what they can do. I feel better already.

 

So I've had the car back from the shop for two weeks and running great. They said I had the PCV in backwards and I needed the Power FC. They also swap my MAP sensor I belive. They did a great job. I need a fuel pump to run more the 10 psi, so I'm putting 220 to the graound right now in full non-seq. Also bought a new battery and boost controller..