Need SR20help. Desprate. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Cordeez · 08-09-2006, 06:37 PM

Hey all, i recently got my SR20 back from a local shop (redshift DC) after they had to do some wiring on my car and other misc things. However the car has been having some problems. Im really exhausted and about to give up, so thought maybe a few people on here might know whats wrong. Here are my problems.

There is oil inside of my Cold pipe, is that normal? (its a redtop with a T28 that was inspected and in good condtion). I have a bad oil leak somewhere in the engine, and i belive it is on the oil return line off of the T28. it is bad enough so that theyre is oil on my catback exhaust pipes. But the problem is that it dosent leak badly at idle. I read something about how it needs a resistor in the oil lines because its a ball bearing turbo, and not a T25 with a journal shaft bearing.

Also , whe ni was driving the car it had almost liek a hiccup or maybe a missfire arround 5 or 6K rpm, any idea why thaty would happen? I think i might need an FPR because i put in a Walbro 255lph pump. Thanks alot let me know.

CLIFFS.
How to fix oil return line?
Is it okay to have oil in my FMIC pipes?
reasons for MIssfire . Timing was done correctly.
thanks guys, just kidna exhausted here.

Cordeez · 08-09-2006, 07:02 PM

Also, only seems to leak while after being in boost.

DOHCsky · 08-10-2006, 06:44 AM

are you running the factory catch can or any can for that matter? if you have blow by it might be pushing oil into the intake and then sucking it throught the turbo. oil lowers octane rating like crazy so if you are getting oil in the combustion chamber it might be causing detonation under boost.

HalveBlue · 08-10-2006, 11:17 AM

As far as the oil in your FMIC piping is concerned, on a stock set up the PCV valve is connected to the Intake pipe. I believe the theory behind this is that any pressurized oil is removed from the engine and fed through the intake system to be burned up during the normal combustion cycle. So, it's normal, but probably not advisable.

Also, I've heard that while this is normal, it can also sometimes mask problems associated with the turbocharger.

As for the misfire, I don't know if you're running an atmospheric BOV, but if you are, I know that this causes the engine to backfire every once in a while. I believe it stems from the fact that the ECU adjusts the air-fuel mixture before the air is vented. Subsequently, once your BOV releases the air to the atmosphere the mixture is now much richer than what the ECU accounted for.

Good luck on your car. I know how it feels, I'm working on putting a new headgasket on mine.

08-09-2006, 06:37 PM	#1
Cordeez Join Date: Apr 2006 Location: Maryland Posts: 28 Trader Rating: (0) Feedback Score: 0 reviews	Need SR20help. Desprate. Hey all, i recently got my SR20 back from a local shop (redshift DC) after they had to do some wiring on my car and other misc things. However the car has been having some problems. Im really exhausted and about to give up, so thought maybe a few people on here might know whats wrong. Here are my problems. There is oil inside of my Cold pipe, is that normal? (its a redtop with a T28 that was inspected and in good condtion). I have a bad oil leak somewhere in the engine, and i belive it is on the oil return line off of the T28. it is bad enough so that theyre is oil on my catback exhaust pipes. But the problem is that it dosent leak badly at idle. I read something about how it needs a resistor in the oil lines because its a ball bearing turbo, and not a T25 with a journal shaft bearing. Also , whe ni was driving the car it had almost liek a hiccup or maybe a missfire arround 5 or 6K rpm, any idea why thaty would happen? I think i might need an FPR because i put in a Walbro 255lph pump. Thanks alot let me know. CLIFFS. How to fix oil return line? Is it okay to have oil in my FMIC pipes? reasons for MIssfire . Timing was done correctly. thanks guys, just kidna exhausted here.

08-09-2006, 07:02 PM	#2
Cordeez Join Date: Apr 2006 Location: Maryland Posts: 28 Trader Rating: (0) Feedback Score: 0 reviews	Also, only seems to leak while after being in boost.

08-10-2006, 06:44 AM	#3
DOHCsky Join Date: Nov 2005 Location: central florida Posts: 24 Trader Rating: (2) Feedback Score: 2 reviews	are you running the factory catch can or any can for that matter? if you have blow by it might be pushing oil into the intake and then sucking it throught the turbo. oil lowers octane rating like crazy so if you are getting oil in the combustion chamber it might be causing detonation under boost.

08-10-2006, 11:17 AM	#4
HalveBlue Zilvia FREAK! Join Date: Mar 2004 Location: I'm somewhere where I don't know where I am! Posts: 1,549 Trader Rating: (0) Feedback Score: 0 reviews	As far as the oil in your FMIC piping is concerned, on a stock set up the PCV valve is connected to the Intake pipe. I believe the theory behind this is that any pressurized oil is removed from the engine and fed through the intake system to be burned up during the normal combustion cycle. So, it's normal, but probably not advisable. Also, I've heard that while this is normal, it can also sometimes mask problems associated with the turbocharger. As for the misfire, I don't know if you're running an atmospheric BOV, but if you are, I know that this causes the engine to backfire every once in a while. I believe it stems from the fact that the ECU adjusts the air-fuel mixture before the air is vented. Subsequently, once your BOV releases the air to the atmosphere the mixture is now much richer than what the ECU accounted for. Good luck on your car. I know how it feels, I'm working on putting a new headgasket on mine.