i've been pampering my rx7 for a while after putting her back! (double throttle remove, vac. hose job, port waste gate) During this two weeks, i've change my plugs, Mobil1 oil, flush tranny, flush radiator, and TPS recalibration). Everything looks good.

2 days ago, i tested the turbo (sequentials) and got only 0.5 bar. *i dont know in psi* straight away i knew something is wrong... so i tried again and max out at 0.5 bar. I left off the throttle and take a glance on the side view mirror and whitish smoke is filling the street. So i took her slowly and the smoke dissapears.

I smell oil in the exhaust and not coolant. I double check and the coolant is full. Is my secondary turbo dead as it only smokes above 3000rpm/hard driving? i tried spinning the turbo fins and both are ok!! Im confused...

 

Visit this site for learning how to troubleshoot turbo control problems http://www.autosportracetech.com/RX-7/rx7stuff.htm

0.5 kg/cm^2 is 7.11 psi

0.5 Bar is 7.25 psi

1 kg/cm^2 is 14.22 psi

1 Bar is 14.5 psi

 

yeah tanx sleepR1... im reading this from your previous post.. hehe..

My vaccum is at 400-500 Hg, if its relevant.

i know that the secondary wont work if i dont have 8 psi.. which i dont by the look of that equations *tanx by the way*

What i want to know is, the white smoke is a sign of oil leak rite? so where is it coming from? I dont see signs of oil in the intake, nor oil in the turbo fins... Do i have to take the turbo out again to check if i have oil leak in the turbo? or could i have mistakenly not tighten some oil lines that caused to smokes??

 

sounds like you are missing the pills in the vaccum lines that come off the primary turbo compressor housing and into the wastegate/precontrol actuators

check that out by squeezing the lines to see if they have metal objects inside them...if so, let us know

 

Did you disconnect alot of vacuum hoses when doing all those things?
Thats crazy about the coolant/water smoke coming on at 3k rpms+

So your getting about 7.5psi on the Primary? Is that your normal psi for primary?
And your getting 0 on the 2ndary?
Are your turbos arent making any funky noises?

 

actully... 1 bar is 14.9 psi

 

No... actually 1 bar is 14.503773773 psi. Which most people will just round down to 14.5psi.

I love it when someone corrects someone with incorrect info.

 

sorry guys... i've been busy moving to a new place...

well... i cant update at the moment, but i know im not getting a full 8psi so i have to check the primary first.

93BlackFD: i did the simplified sequential setup so i took all the hoses of and put new silicone hose. I have check again and again and its the exact setup like in the diagram. Which pill are u talking about?

 

Did you have that number memorized?


Sounds like a pill issue to me as well. The stock wastegate spring will control boost without those, and it'll be limited to 7 psi.

 

911GT2: by looking at the diagram there is only 3 pill. So should there be a pill in the wastegate solenoid (I)??

 

oopsss... here is the link...

http://www.rx7turboturbo.com/robrobi...simplified.jpg

 

i was very specific where the pill goes...the only way you'll hit 7 on the primary or secondary is without pills, it's the wastegate spring load

with pills, you should hit 8-10

 

sorry to bring this old thread, but i didnt want to make a new one as im still stuck wiv this problem.

Update... i tried putting a pill to the wastegate and it still doesnt reach more that 0.5 psi...

Can anybody verify what the smoke is? people say white smoke is coolant, but i smell it and it smells like burning oil but it does look a bit whithish and bluish... so im not sure...

Is my turbo toast?? my boost pattern is 0.5-0.4-0.5 (BAR not PSI)

 

bluish smoke is oil (im thinking, correct me if im wrong)

 

oil can burn white too

 

fuel= dark smoke
oil= lighter white-ish smoke
coolant= steamy white vapor that dissipates quickly....

 

If you see bluish smoke from the exhaust when you lift off the throttle, to upshift during WOT acceleration, that's oil smoke. You're getting oil in the intake tract. That oil can be from leaking turbos, or from the oil filler neck tap venting crank case pressure through the primary turbo inlet nipple.

 

tanx for info guys... i know that it is oil. Burning oil!! i check the radiator filler neck and no bubbles, that's good so far.

This is what i notice, if i go from L to D **auto** my car back fires now, and i know coz when im in high rpm around 6000+ and let go of the throttle it pops and black smokes (fuel of course) comes out. And this is without boosting!!

First Question: *pondering* Could an auto back-fire wiv stock ecu?

But if do boost hard (only 0.5 bar), i get that whitish/bluish smoke... and its damn embarassing having all those smokes fill the street like a James Bond movie... hahaha

What im trying to find now is the oil leak going into the turbo. That's my main priority! and i will deal with the boost issue later.

SleepR1:
2nd question:
So now can i just take out the line from the oil filler neck? i read somewhere that the newer rx7 (1996+) doesnt have that line going to the UIM. will that stop the smokes??

I dont think my turbos are bad. I checked the turbines for play and its good. No oil in the intake, but some in the black pipe before the IC... which is normal. If any1 have experience this plz share your thoughts...

TQ & sori for this long post...

 

The FD3Ses after 1995 did away with the PCV line (I think??). I have both the PCV and primary turbo vent nipple on the oil filler neck plugged. I'm venting the crank case pressure (blowby) with a modified oil filler neck cap and vented/filtered catch bottle. If you cap the oil filler neck nipples, you also need to cap off the primary turbo inlet rat's nest line, and the PCV line nipple under the extension manifold (known as the upper intake manifold on this forum). Check out CrispyRx7's site regarding the oil catch can modification http://reganrotaryracing.tripod.com/catch.htm Note that the special "Crispy Cap" is mandatory for the catch can to work properly. The cap pictured at the bottom is the "updated" version, and is the one I currently have on my FD3S.

 

i read that post a while ago. Im not sure if it will help since i dont track my car, but ill try it anyway.

So i took out the vac.line on the primary turbo and cap them. Looks something like in the pix but wivout the "red" vac.line.

[IMG] https://www.rx7club.com/forum/attach...postid=2104343 [IMG]


My question is can i just run the vac.line from the oil filler neck straight to a catch tank?? I dont think i can find the necessary parts like in the thread you posted.

-D-