(1990 honda crx) i bought a turbo kit and i bolted up the turbo to the exaust, the down pipe does not have a hole for the O2 sensor as of yet. i started the engine but as soon as it starts up it starts to blow out smoke that smells like gas, and the air/fuel meter stays at rich. what could cause this, the engine was running great before i bolted up the turbo. ( no intake piping is connected at this moment and the engine is stock) when it does start it will run decent for a few seconds and slowly start sputtering and then shuts down. when u rev it and hold it at high rpm it will run but blow rich smoke out the exaust side of the turbo. its a d15 with a mpfi conversion with a pm6 computer.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blackcrx16 &raquo;</TD></TR><TR><TD CLASS="quote">(1990 honda crx) and the air/fuel meter stays at rich. </TD></TR></TABLE>

I am confused as to how your air/fuel meter could be working with no o2 sensor hooked up. That is probably your first problem.

 

uhm....

 

If you bolted the turbo up to the downpipe and crank the car, it should smoke like hell. It's not the car running rich, its the turbo burning up due to the lack of oil.

 

And your a/f gauge connected to the narrow band O2, that isn't even plugged up is telling you absolutely nothing. Try uninstalling the turbo and reading up on turbo FAQs before you blow the motor

 

Im sorry but that is pretty stupid..You do realize that revving the engine without the chargepiping can over spool the turbo??

And for the o2 sensor,,drill a hole in the downpipe and weld on a bung,,or just do it ghetto and tie it around the manifold so it feels the heat..

 

Please read this like autoworks has said https://honda-tech.com/zerothread?id=1024174

 

i fixed this problem , it was the map sensor plug mixed up with another one(it was late last night why i didnt notice), the engine runs fine now but i have another question, turbos, if u put the t fitting where the oil pression sensor goes and hook up a line from there to the turbo would the pressure from that be too much for the turbo, when i let the full pressure go to the turbo , the turbine is hard to turn and oil slowly leaks out the exaust side of the turbo and the intake side of the turbo, but when i pinch the oil line going to the turbo it starts to spin with the engine running but as soon as you un pinch the oil line the turbine stops and oil slowly starts flowing out of the turbo. what do i do?

 

Yeah some turbos are like that..You have to run a restrictor..some have restrictors built in..

You can weld the oil hole on the turbo shut,,then drill a smaller hole...

Or you can buy one of these http://stealthmodeperformance.com/oil-res.shtml

 

can pvc piping be used, can that work temporarly? or i should just not bother till i get the money for t he intercooler piping?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr.speaker &raquo;</TD></TR><TR><TD CLASS="quote">drill a hole in the downpipe and weld on a bung,,or just do it ghetto and tie it around the manifold so it feels the heat..</TD></TR></TABLE>

That will not work. The actual O2 sensor needs to be in the exhaust gas stream. It will not get an O2 reading from the radiant heat off of the manifold.

And blackcrx16, I'm still curious as to how your narrowband was working without the actual sensor?????

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blackcrx16 &raquo;</TD></TR><TR><TD CLASS="quote">can pvc piping be used, can that work temporarly? or i should just not bother till i get the money for t he intercooler piping?</TD></TR></TABLE>

Dont bother until you get the correct piping...although i had a buddy that ran EMT fence piping on his setup, and it worked fine.

 

i would go with an oil restrictor and pray to got that you didnt blow and oil seal from the turbo spinning freely... that should hopefully cure the problem... as for pvc piping DO NOT use it... if youre short on cash right now i would suggest going for something like metal flex pipe from advance auto parts or something... btw are you running an intercooler? and what type of fuel managment are you using?
-Josh

 

how hard is it to change the oil seals in a turbo?

 

and where can i get them?

 

Its time to take these questions to the Forced Induciton forum.