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

Go Back   Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum > General > Tech Talk > S Chassis

S Chassis Technical discussion related to the S Chassis such as the S12, S13, S14, and S15.


Reply
 
Thread Tools Display Modes
Old 11-22-2010, 09:00 PM   #1
Fender Defender
Zilvia Junkie
 
Fender Defender's Avatar
 
Join Date: Feb 2010
Location: Orange County, CA
Posts: 497
Trader Rating: (5)
Fender Defender is an unknown quantity at this point
Feedback Score: 5 reviews
SR Help! my vac is at 5 on my boost gauge at idle on my SR!!!

I have sr20det with my vac at 5 on idle when I'm looking on my boost gauge. My car idles fine and everything. My idle is at 800. It drives fine. Except for the exhaust leaks. I tightened all my couplings today and hoses. My bov T's however are not tightened using a clamp but that wouldnt make me lose so much vac. Can it be my intercooler, bov? Also my fpr doesnt seem to be getting any vac at idle is it supposed to? Like when i press on it theres no vac pressure. I have power fc L detro btw. Engine doesnt sound like before sounds more taptaptaptaptap from under the car which i know are from the exhaust leaks. Iono if I have a built motor cus I never opened it to check lol.

here's a pic of the setup.
I seperated the lines by colors. the green is for the fpr. The red is for bov.



heres a pic of the current setup. All the boost shizz and bov lines were redone by sidewayspfmce as pictured.

Last edited by Fender Defender; 11-22-2010 at 09:53 PM..
Fender Defender is offline   Reply With Quote
Sponsored Links
Old 11-22-2010, 09:07 PM   #2
nismolvr
Zilvia Junkie
 
nismolvr's Avatar
 
Join Date: Aug 2006
Location: Modesto,California
Posts: 355
Trader Rating: (3)
nismolvr is an unknown quantity at this point
Feedback Score: 3 reviews
s13

check timing
__________________
nismolvr is offline   Reply With Quote
Old 11-22-2010, 09:37 PM   #3
Fender Defender
Zilvia Junkie
 
Fender Defender's Avatar
 
Join Date: Feb 2010
Location: Orange County, CA
Posts: 497
Trader Rating: (5)
Fender Defender is an unknown quantity at this point
Feedback Score: 5 reviews
wheres the timing supposed to be at? mines at 15 at idle
Fender Defender is offline   Reply With Quote
Old 11-22-2010, 09:41 PM   #4
blksylv
Premium Member
 
blksylv's Avatar
 
Join Date: Nov 2007
Location: bumfuck VA
Posts: 1,814
Trader Rating: (33)
blksylv is not welcome here anymoreblksylv is not welcome here anymoreblksylv is not welcome here anymoreblksylv is not welcome here anymoreblksylv is not welcome here anymoreblksylv is not welcome here anymoreblksylv is not welcome here anymoreblksylv is not welcome here anymoreblksylv is not welcome here anymore
Feedback Score: 33 reviews
how bad r ur exhaust leaks?
__________________
Quote:
Originally Posted by ixfxi View Post
there is nothing wrong with enjoying the build. however, we sometimes have to remind ourselves that the build is only one part of the puzzle, and that ultimately - enjoying and driving the car is the number one priority.
blksylv is offline   Reply With Quote
Old 11-22-2010, 09:59 PM   #5
nismolvr
Zilvia Junkie
 
nismolvr's Avatar
 
Join Date: Aug 2006
Location: Modesto,California
Posts: 355
Trader Rating: (3)
nismolvr is an unknown quantity at this point
Feedback Score: 3 reviews
did some one mess around and adjust your throttle stop screw settings?sounds to me like the trottle plate is too closed and does not allow correct vacuum reading ,check to make sure vacuum gauge hose are not pluged up .Try to measure manifold vacuum from brake booster hose if you can. by the way timing supposed to be checked with engine warm normal op temp your engine should be idling around 850rpm with TPS disconnected.Stock factory timing is at 15 degrees, which is the 2nd to last mark on the crank pulley.
__________________
nismolvr is offline   Reply With Quote
Old 11-22-2010, 09:52 PM   #6
Fender Defender
Zilvia Junkie
 
Fender Defender's Avatar
 
Join Date: Feb 2010
Location: Orange County, CA
Posts: 497
Trader Rating: (5)
Fender Defender is an unknown quantity at this point
Feedback Score: 5 reviews
they are decent. Iono they told me that i had a crack on my exhaust manifold but visually theres none and sounds like theres none. the sound seems to be coming from under after downpipe around cat area
Fender Defender is offline   Reply With Quote
Old 11-22-2010, 10:06 PM   #7
Fender Defender
Zilvia Junkie
 
Fender Defender's Avatar
 
Join Date: Feb 2010
Location: Orange County, CA
Posts: 497
Trader Rating: (5)
Fender Defender is an unknown quantity at this point
Feedback Score: 5 reviews
Whats throttle screw settings u mean Iacv screw? uhh not that I know of but Spencer did it once to test out my car and gun it it ran great. Oh yeh thats true about the screw he screwed it in almost all the way in the way it was when i first got the motor. I can actually check timing using my Apexi power fc controller. its at 15 degrees on idle. Yeh my idles is just on there atg 850. So should I retard the ignition a little and adjust my iacv to match up to 850 and compesate for my vac? How will I measure the manifold from brake booster? Thanks alot for the info btw!
Fender Defender is offline   Reply With Quote
Old 11-22-2010, 10:22 PM   #8
nismolvr
Zilvia Junkie
 
nismolvr's Avatar
 
Join Date: Aug 2006
Location: Modesto,California
Posts: 355
Trader Rating: (3)
nismolvr is an unknown quantity at this point
Feedback Score: 3 reviews
Quote:
Originally Posted by chogunna91 View Post
Whats throttle screw settings u mean Iacv screw? uhh not that I know of but Spencer did it once to test out my car and gun it it ran great. Oh yeh thats true about the screw he screwed it in almost all the way in the way it was when i first got the motor. I can actually check timing using my Apexi power fc controller. its at 15 degrees on idle. Yeh my idles is just on there atg 850. So should I retard the ignition a little and adjust my iacv to match up to 850 and compesate for my vac? How will I measure the manifold from brake booster? Thanks alot for the info btw!
IAC is not what im talking about,although you will have to re adjust it if my suspicion is right.im talking about your throttle plate screw ,if you look closely there is a tiny machined screw and its set at factory. If some one closed it too much it could interfere with correct vacuum redings ,it means the Throttle valve needs to be adjusted slighly to allow small orifice to read vaccum at idle.Open it in small incraments untill you see vacuum rise to 18 ,then you might have to back down IAC, lastly check your TPS settings at idle, you should be able to through your power FC controller.
__________________
nismolvr is offline   Reply With Quote
Old 11-22-2010, 10:40 PM   #9
Fender Defender
Zilvia Junkie
 
Fender Defender's Avatar
 
Join Date: Feb 2010
Location: Orange County, CA
Posts: 497
Trader Rating: (5)
Fender Defender is an unknown quantity at this point
Feedback Score: 5 reviews
Okay forsure about the throttle plate screw. I'll take a look at that tommorow morning. Also one more question instead of teeing the line that goes to the bov and wastegateac(red) can i take the t off where it connect to the wastegate n make it go straight to the bov, and then add another line to the closed nipple under the throttle opening and connect it to the wastegate?
Fender Defender is offline   Reply With Quote
Old 11-22-2010, 10:59 PM   #10
nismolvr
Zilvia Junkie
 
nismolvr's Avatar
 
Join Date: Aug 2006
Location: Modesto,California
Posts: 355
Trader Rating: (3)
nismolvr is an unknown quantity at this point
Feedback Score: 3 reviews
s13

Quote:
Originally Posted by chogunna91 View Post
Okay forsure about the throttle plate screw. I'll take a look at that tommorow morning. Also one more question instead of teeing the line that goes to the bov and wastegateac(red) can i take the t off where it connect to the wastegate n make it go straight to the bov, and then add another line to the closed nipple under the throttle opening and connect it to the wastegate?
WTH! I just saw your picture and drawing.Never connect vacuum to Waste gate! Waste gate needs positive pressure from Hot side of turbo piping (hot pipe , you need to weld a nipple on it) its there to protect your engine , when you over boost , pressure in the Inter cooler piping pushes diaphragm and spring tension and opens waste gate and prevents you from over boost.Run your BOV and vacuum/boost gauge from same source and DO NOT CONNECT WASTE GATE . Run hose from hot pipe to waste gate only. Fix that first.
__________________
nismolvr is offline   Reply With Quote
Old 11-22-2010, 10:49 PM   #11
Fender Defender
Zilvia Junkie
 
Fender Defender's Avatar
 
Join Date: Feb 2010
Location: Orange County, CA
Posts: 497
Trader Rating: (5)
Fender Defender is an unknown quantity at this point
Feedback Score: 5 reviews
like this the yellow line
Fender Defender is offline   Reply With Quote
Old 11-22-2010, 11:22 PM   #12
KiLLeR2001
Post Whore!
 
Join Date: Jun 2007
Location: オーランドフロリダ
Posts: 7,955
Trader Rating: (46)
KiLLeR2001 has much to be proud ofKiLLeR2001 has much to be proud ofKiLLeR2001 has much to be proud ofKiLLeR2001 has much to be proud ofKiLLeR2001 has much to be proud ofKiLLeR2001 has much to be proud ofKiLLeR2001 has much to be proud ofKiLLeR2001 has much to be proud ofKiLLeR2001 has much to be proud ofKiLLeR2001 has much to be proud ofKiLLeR2001 has much to be proud of
Feedback Score: 46 reviews
Connections that need to be made:

- Throttle body to BOV
- Throttle body to FPR
- Hotpipe source to wastegate

Might also want to invest in a catch can.
__________________
KiLLeR2001 is offline   Reply With Quote
Old 11-22-2010, 11:25 PM   #13
Fender Defender
Zilvia Junkie
 
Fender Defender's Avatar
 
Join Date: Feb 2010
Location: Orange County, CA
Posts: 497
Trader Rating: (5)
Fender Defender is an unknown quantity at this point
Feedback Score: 5 reviews
okie doke!! Wait but isn't that one on the bottom boost??? let me redo this real quick and put it up. I'm already in the way of buying one since im upgrading my turbo this week to t28 dual ball bearing.

okay here it is!
Fender Defender is offline   Reply With Quote
Old 11-23-2010, 08:50 AM   #14
nismolvr
Zilvia Junkie
 
nismolvr's Avatar
 
Join Date: Aug 2006
Location: Modesto,California
Posts: 355
Trader Rating: (3)
nismolvr is an unknown quantity at this point
Feedback Score: 3 reviews
s13

Quote:
Originally Posted by chogunna91 View Post
okie doke!! Wait but isn't that one on the bottom boost??? let me redo this real quick and put it up. I'm already in the way of buying one since im upgrading my turbo this week to t28 dual ball bearing.

okay here it is!
that looks about right, FPR is hooked up alone with nothing else , boost/vacuum gauge is "T ed" with BOV. bottom source is pluged.route your vacuum like this and check manifold vacuum if still low,check throttle plate as I stated earlier. also install catch can ,or your going to fill intercooler with oil and sludge.But that can wait.
__________________
nismolvr is offline   Reply With Quote
Old 11-23-2010, 11:21 AM   #15
Fender Defender
Zilvia Junkie
 
Fender Defender's Avatar
 
Join Date: Feb 2010
Location: Orange County, CA
Posts: 497
Trader Rating: (5)
Fender Defender is an unknown quantity at this point
Feedback Score: 5 reviews
Just redid my bov and white smoke came out of exhaust for a second then went away... hmm...
Fender Defender is offline   Reply With Quote
Old 11-23-2010, 06:38 PM   #16
Fender Defender
Zilvia Junkie
 
Fender Defender's Avatar
 
Join Date: Feb 2010
Location: Orange County, CA
Posts: 497
Trader Rating: (5)
Fender Defender is an unknown quantity at this point
Feedback Score: 5 reviews
whats that white smoke that came out of my exhaust???? it only did it once for like a second and it never did it afterwards after i redid my vacuum lines
Fender Defender is offline   Reply With Quote
Old 11-23-2010, 06:48 PM   #17
nismolvr
Zilvia Junkie
 
nismolvr's Avatar
 
Join Date: Aug 2006
Location: Modesto,California
Posts: 355
Trader Rating: (3)
nismolvr is an unknown quantity at this point
Feedback Score: 3 reviews
s13

Quote:
Originally Posted by chogunna91 View Post
whats that white smoke that came out of my exhaust???? it only did it once for like a second and it never did it afterwards after i redid my vacuum lines
If the exhaust billows white smoke for a few seconds when first starting the engine after it has been sitting for a while, such as overnight, and then runs normally, it could mean that the rubber valve stem seals have perished .
whats your vacuum reading now?
__________________
nismolvr is offline   Reply With Quote
Old 11-23-2010, 07:05 PM   #18
Fender Defender
Zilvia Junkie
 
Fender Defender's Avatar
 
Join Date: Feb 2010
Location: Orange County, CA
Posts: 497
Trader Rating: (5)
Fender Defender is an unknown quantity at this point
Feedback Score: 5 reviews
Wait WHAT!!?? is a valve stem ?? My vacuum is good now. Its just the stupid smoke -__- and my motor is not tuned just running on enthalpys base tune and it sounds crappy like it has a slight misfire every few seconds but a small one, and then when i press on the gas slowly on idle all the way to 5k rpm and release it starts misfiring and backfire popping sounds out of my exhaust. Plus with my exhaust leaks my motor sounds stupid.. Its not smoking at all anymore it only did it in the morning after the rain. Like I revved up to 4k rpm and released and smoke came out, then went away and never came back
Fender Defender is offline   Reply With Quote
Old 11-23-2010, 07:17 PM   #19
nismolvr
Zilvia Junkie
 
nismolvr's Avatar
 
Join Date: Aug 2006
Location: Modesto,California
Posts: 355
Trader Rating: (3)
nismolvr is an unknown quantity at this point
Feedback Score: 3 reviews
Quote:
Originally Posted by chogunna91 View Post
Wait WHAT!!?? is a valve stem ?? My vacuum is good now. Its just the stupid smoke -__- and my motor is not tuned just running on enthalpys base tune and it sounds crappy like it has a slight misfire every few seconds but a small one, and then when i press on the gas slowly on idle all the way to 5k rpm and release it starts misfiring and backfire popping sounds out of my exhaust. Plus with my exhaust leaks my motor sounds stupid.. Its not smoking at all anymore it only did it in the morning after the rain. Like I revved up to 4k rpm and released and smoke came out, then went away and never came back
could be valve stem SEALS.You need a catch can. Pressure is building in your crank case oil and sludge is being directly charged back into your Valve cover "T" and continues to turbo and piping intake , bet you inter cooler has oil in it.Bet also oil is leaking into coil packs causing missfire. Pull your plugs and inspect for oil. bet there getting soaked causing your missfire. Also your BOV is not recirculated causing your engine to Run Rich when you lift off gas. theres your backfire.
__________________
nismolvr is offline   Reply With Quote
Old 11-23-2010, 07:32 PM   #20
blueshark123
Post Whore!
 
blueshark123's Avatar
 
Join Date: Apr 2006
Location: North Jersey
Posts: 5,481
Trader Rating: (55)
blueshark123 has a brilliant futureblueshark123 has a brilliant futureblueshark123 has a brilliant futureblueshark123 has a brilliant futureblueshark123 has a brilliant futureblueshark123 has a brilliant futureblueshark123 has a brilliant futureblueshark123 has a brilliant futureblueshark123 has a brilliant futureblueshark123 has a brilliant futureblueshark123 has a brilliant future
Feedback Score: 55 reviews
Quote:
Originally Posted by chogunna91 View Post
Wait WHAT!!?? is a valve stem ?? My vacuum is good now. Its just the stupid smoke -__- and my motor is not tuned just running on enthalpys base tune and it sounds crappy like it has a slight misfire every few seconds but a small one, and then when i press on the gas slowly on idle all the way to 5k rpm and release it starts misfiring and backfire popping sounds out of my exhaust. Plus with my exhaust leaks my motor sounds stupid.. Its not smoking at all anymore it only did it in the morning after the rain. Like I revved up to 4k rpm and released and smoke came out, then went away and never came back
it was water in ur exhaust from the rain
blueshark123 is offline   Reply With Quote
Old 11-23-2010, 07:24 PM   #21
Fender Defender
Zilvia Junkie
 
Fender Defender's Avatar
 
Join Date: Feb 2010
Location: Orange County, CA
Posts: 497
Trader Rating: (5)
Fender Defender is an unknown quantity at this point
Feedback Score: 5 reviews
There was no oil whatsoever in the sparkplugs cus i just checked like 40 minutes ago after i got home. I do need a catch can and I also need my bov recirculated too thanks for all the info. I'll get it done asap.
Fender Defender is offline   Reply With Quote
Old 11-23-2010, 10:00 PM   #22
Fender Defender
Zilvia Junkie
 
Fender Defender's Avatar
 
Join Date: Feb 2010
Location: Orange County, CA
Posts: 497
Trader Rating: (5)
Fender Defender is an unknown quantity at this point
Feedback Score: 5 reviews
okie doke thanks! I guess now all i need to do is to fix that exhaust leak, get the oil catch can and up grade my turbo and injectors then tune.
Fender Defender is offline   Reply With Quote
Reply

Bookmarks


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 10:40 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
vB.Sponsors
Copyright © 1998 - 2019, Zilvia.net™