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D16z6

 
Old 05-14-2019, 08:14 PM
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Hello I have a turbo d16z6 with cp pistons, eagle rods, arp head studs, dsm t25 turbo, dsm 450 injectors, stock head with new stem seals, h22 throttle body. I got my car tuned to pass emissions and run great. Recently I decided to take my cat off and put a test pipe. After a while I put the cat back on because I was seeing a lot of gray and black smoke. Even with the car being warm it stills smokes. I have replaced the head gasket and still had the same issue. I did a compression test and everything came out good with good compression. I also did a leak down test and everything came out good as well. We went and took the motor apart saw that one of the rings looked a little damaged so we honed the cylinder wall and put a new ring on. I changed the head gasket one more time, and even checked the turbo to see if itís the problem. I have ran out of ideas on what it can be. Now itís more like a gray color smoke and it kind of smells like corn in a way. I also put new stem seals. Can it be something with the tune, or maybe the fact that I went from a cat to a test pipe?? Any ideas??
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Old 05-14-2019, 09:55 PM
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PVC?
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Old 05-14-2019, 09:58 PM
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Remove the hose going from pvc to plenum and see if there's oil up in there
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Old 05-15-2019, 05:25 AM
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New pvc valve, but Iíll double check to see if thereís not oil build up
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Old 05-15-2019, 06:22 PM
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My y8/b7 sucks oil through into mani on startup despite pvc and hose replacement. Even cleaned breather box on back of block out. I finally just capped it all off because who cares, D. Still a perplexing problem
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Old 05-16-2019, 12:06 AM
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Default Re: D16z6

Welcome to the forum.
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Old 05-18-2019, 11:28 AM
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Found my issue it was the head. I am pissing oil from the head going into the headers.
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