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PCV Problems

Posted 07-18-2009 at 12:14 AM by whipit
I recently purchased a '91 MR2 Turbo that is having some issues. A little bit of history:

This car was not purchased stock and has the following modifications that I can tell. Here is what I know is currently on the vehicle.

After Market Huge F*** off Turbo (Not sure what it is though)
Stock Intercooler
4" Intake pipe
NGK Spark Plug wires
ApexI Super AFC
HKS Vien Pressure Converter
Greddy Boost Controller PRDFEC-v
Jspec Engine control ST135
ApexI Super Ignition Timing Converter
After market waste gate and bov

Problem 1:
When I first bought this vehicle the PCV hose was connected to a breather filter. I purchased the Intake pipe and rerouted it back into the intake. The problem is that the PCV is blowing lots of smoke/oil, more than what I think is normal. When I pull the intake tube and hot-pipe there is oil residue.

1. Is this normal?
2. If this is not, then what would be the cause(s) of the blowby?
I pulled all the spark plugs and they were not fouled, and it is not blowing smoke out the exhaust. This is why I think that the rings are not the culprut.

When I received the car there was too much oil in it (completely overfilled), which I believe is leading to some / most of these issues. I immediately drained and changed the oil, and filled it to the proper specifications. I just don't know how long the car was driven in this state.

Problem 2:
Each time that I get into boost, the car stutters. When the car is relatively cool I am able to get into higher boost without it stuttering. As the temperature of the engine increases, the less boost I am able to get into before the engine starts to cut out. I am not sure whether it is cutting fuel, spark, or both.

3. Could the issue(s) with the blowby be causing or have inpact to these boost problems.

4. I have no doubt that the engine is not tuned properly, but am unsure of how to tune it given all these all modifications.

Does anyone have any advice / specifications or manuals for the above listed aftermarket pieces.

Any thoughts or advice would be greatly appreciated.

Thank you.

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