jerryscherry
05-15-2012, 11:16 PM
so picked up a 92 240sx with a k24de with a t3/t4 turbo kit. owner said boosting 5lbs, tial wg, blitz bov, fmic, apexi safc2 , vortech fmu, z32 maf, z32 fuel filter
i noticed blitz bov wasn't working properly, (compressor flutter), opened it, cleaned it, loosened the spring adjuster, still compressor flutter, so tried it on a friends sr20det boostin 7lbs, WORKS FINE. So its not the bov, guessing need a stronger vacuum source? Also the boost gauge was reading -10 vacuum idle. car likes to stall if you hit full boost then put it on neutral. car also idles at around 1000-1100 rpms
Also after we took off the bov and put it back on, we plugged the egr valve and a nipple under the intake mani, turned on the car, vacuum reading like -18 vacuum on idle o.o? weird, and the idle is now like 800-900, car will drop to very low idle and stall many times if u step on throttle( we were testing bov, turns out it is blowing air, but not fully opening, probably need a stronger vacuum) Vacuum drops to about -25 in between shifts, so right when u let off the throttle... and if u put it in neutral rpms will drop to almost 0 and stall many times o.o? Also tried boosting, and boost gauge now went up to 7psi o.O? before it wouldn't go past 5psi. And car doesn't seem to hold boost after 5000rpms anymore. And smells like car is running super rich now..
My first question is, whats a good independent source for bov? it opens but not all the way... brake booster?
Also, why would my car read -18 vacuum idle , drop to -25 in between shift and stall out many times. Why is boost gauge going to 7lbs now when it stayed at 5lbs before and car not holding boost around after 4500 rpms. ALL WE did was take off the bov , and the intercooler pipe, put it back, plugged the egr and intake mani nipples. and all this weird stuff happens o.O?
Gonna have friend look at it again, give the BOV a individual source of vacuum, also the FMU, smells like running super rich. damn ppl who don't do their turbo setups correctly. Any help or advice is appreciated.
some pics of the engine bay and the bov vacuum line, has a bunch of other T's connected to it.
http://i170.photobucket.com/albums/u275/jerryscherry/IMG_20120514_190211.jpg
http://i170.photobucket.com/albums/u275/jerryscherry/IMG_20120514_190143.jpg
http://i170.photobucket.com/albums/u275/jerryscherry/IMG_20120514_190125.jpg
http://i170.photobucket.com/albums/u275/jerryscherry/IMG_20120514_190108.jpg
Update 05/16/2012
noticed that it hesitates every once in a while during idle, rpms drop like 50-100 rpms and you can hear the engine hesitate, but only on idle. Also starting to smell like fuel, super richness o.O? im almost at half a tank of gas and only got about 60miles.. WTFFF!??!?!?!
UPdate 05/17/2012 (after taking to G-Dimensions)
So took it to G dimensions, they did a boost/vacuum leak test + compression
Compression is as follows 1-4 : 160, 170, 165, 160
CEL COdes: #11 Cam Shaft Angle, #12 Air Flow Meter, #21 Ignition Signal, #32 EGR
Leaks were coming from EGR and a vacuum hose under the radiator hose.
Also have exhaust leaks from a broken manifold bolt, where the turbo mates the manifold (tightened only on 3 bolts).
They capped the egr and changed the hose. Think they also said i have a misfire.
BOV works now probably has enough vacuum. STill weird though, boost doesn't seem to hold sometimes???? Vacuum pretty normal now, and no more random low idle problems after throttle. But doesn't seem to run as rich anymore, now the FMU got vacuum..
Updates 05/23/2012
I felt it was time to stop being a noob so i opened my hood, stuck my a vacuum line in my ear and moved it around to listen for hissing sounds. Found out one of my vacuum line was old and cracked, the one that leads from under the intake mani, and goes to some black cylinder thingy (i think for fuel) next to the turbo intake and right side of the radiator. i was told i didn't need it, so i ran that line to the BOV, and what do you know, BOV works Flawlessly, and my car is boosting great now, still having idle problems but don't think i secured the vacuum line under the intake mani correctly ( not a lot of space to work with, and it was getting dark). I will try to secure the vacuum line today make it tight, and also redo that coupler on the intercooler on the intake mani side. Car seems to go to a very low idle, or stall after i let off the gas, prob the vacuum leak ,
Updates 06/08/2012
disconnected vacuum for bov, no stalling, no drop in idle. okay so im guessing its the BOV letting out un metered air causing richness and stalling. i didn't know the bov opened when im slightly accelerating to 3k rpm. Regardless, i have a apexi safc2 which has decel settings, i dunno how to wire it though, i have a diagram, but staring at all the wires scares me. So far the apexi safc2 is only measuring throttle % and rpms. i need to wire the MAF and the other stuff. anybody in socal help me out :x? i dont plan to use it as a primary source of tuning. gonna get a enthalpy tune, then dyno fine tune with the safc.
Updates 06/14/2012
Got SAFC wired up, setup DEC AIR settings, no more stalling with bov connected. yay! it does however dipto about 400-500 rpms Sometimes, but never stalls. woot looking to get intake mani prepped and emissions removed,sr20 injectors, enthalpy ecu, woot.
Final Updates
Intake Manifold emission removed and prepped by Jonathan , 370 injectors and N60 Maf installed.
Hit up Jason fro EMance and drove down to san diego, and he hooked me up with a street tune for my setup. (much better then mailing in your ecu to entalpy or something and having them try to estimate your tune.) My A/F ratios are perfect after 3 pulls on the street.
Jason also found out previous owner advanced the timing by 5 degrees... WTF???? anyways he fixed that.
Car runs great now xP lots of reliable power for a daily driver only at 5lbs :). Also keeping the apexi safc for teh DECEL settings so i can run my atmospheric BOV.
Took a while, but im glad i cleaned up my setup and did everything right, so i can now enjoy a reliable daily driver.
Thanks alot to Jonathan for prepping my engine and helping me out and referring me to Jason, and Jason of course for the tune !
i noticed blitz bov wasn't working properly, (compressor flutter), opened it, cleaned it, loosened the spring adjuster, still compressor flutter, so tried it on a friends sr20det boostin 7lbs, WORKS FINE. So its not the bov, guessing need a stronger vacuum source? Also the boost gauge was reading -10 vacuum idle. car likes to stall if you hit full boost then put it on neutral. car also idles at around 1000-1100 rpms
Also after we took off the bov and put it back on, we plugged the egr valve and a nipple under the intake mani, turned on the car, vacuum reading like -18 vacuum on idle o.o? weird, and the idle is now like 800-900, car will drop to very low idle and stall many times if u step on throttle( we were testing bov, turns out it is blowing air, but not fully opening, probably need a stronger vacuum) Vacuum drops to about -25 in between shifts, so right when u let off the throttle... and if u put it in neutral rpms will drop to almost 0 and stall many times o.o? Also tried boosting, and boost gauge now went up to 7psi o.O? before it wouldn't go past 5psi. And car doesn't seem to hold boost after 5000rpms anymore. And smells like car is running super rich now..
My first question is, whats a good independent source for bov? it opens but not all the way... brake booster?
Also, why would my car read -18 vacuum idle , drop to -25 in between shift and stall out many times. Why is boost gauge going to 7lbs now when it stayed at 5lbs before and car not holding boost around after 4500 rpms. ALL WE did was take off the bov , and the intercooler pipe, put it back, plugged the egr and intake mani nipples. and all this weird stuff happens o.O?
Gonna have friend look at it again, give the BOV a individual source of vacuum, also the FMU, smells like running super rich. damn ppl who don't do their turbo setups correctly. Any help or advice is appreciated.
some pics of the engine bay and the bov vacuum line, has a bunch of other T's connected to it.
http://i170.photobucket.com/albums/u275/jerryscherry/IMG_20120514_190211.jpg
http://i170.photobucket.com/albums/u275/jerryscherry/IMG_20120514_190143.jpg
http://i170.photobucket.com/albums/u275/jerryscherry/IMG_20120514_190125.jpg
http://i170.photobucket.com/albums/u275/jerryscherry/IMG_20120514_190108.jpg
Update 05/16/2012
noticed that it hesitates every once in a while during idle, rpms drop like 50-100 rpms and you can hear the engine hesitate, but only on idle. Also starting to smell like fuel, super richness o.O? im almost at half a tank of gas and only got about 60miles.. WTFFF!??!?!?!
UPdate 05/17/2012 (after taking to G-Dimensions)
So took it to G dimensions, they did a boost/vacuum leak test + compression
Compression is as follows 1-4 : 160, 170, 165, 160
CEL COdes: #11 Cam Shaft Angle, #12 Air Flow Meter, #21 Ignition Signal, #32 EGR
Leaks were coming from EGR and a vacuum hose under the radiator hose.
Also have exhaust leaks from a broken manifold bolt, where the turbo mates the manifold (tightened only on 3 bolts).
They capped the egr and changed the hose. Think they also said i have a misfire.
BOV works now probably has enough vacuum. STill weird though, boost doesn't seem to hold sometimes???? Vacuum pretty normal now, and no more random low idle problems after throttle. But doesn't seem to run as rich anymore, now the FMU got vacuum..
Updates 05/23/2012
I felt it was time to stop being a noob so i opened my hood, stuck my a vacuum line in my ear and moved it around to listen for hissing sounds. Found out one of my vacuum line was old and cracked, the one that leads from under the intake mani, and goes to some black cylinder thingy (i think for fuel) next to the turbo intake and right side of the radiator. i was told i didn't need it, so i ran that line to the BOV, and what do you know, BOV works Flawlessly, and my car is boosting great now, still having idle problems but don't think i secured the vacuum line under the intake mani correctly ( not a lot of space to work with, and it was getting dark). I will try to secure the vacuum line today make it tight, and also redo that coupler on the intercooler on the intake mani side. Car seems to go to a very low idle, or stall after i let off the gas, prob the vacuum leak ,
Updates 06/08/2012
disconnected vacuum for bov, no stalling, no drop in idle. okay so im guessing its the BOV letting out un metered air causing richness and stalling. i didn't know the bov opened when im slightly accelerating to 3k rpm. Regardless, i have a apexi safc2 which has decel settings, i dunno how to wire it though, i have a diagram, but staring at all the wires scares me. So far the apexi safc2 is only measuring throttle % and rpms. i need to wire the MAF and the other stuff. anybody in socal help me out :x? i dont plan to use it as a primary source of tuning. gonna get a enthalpy tune, then dyno fine tune with the safc.
Updates 06/14/2012
Got SAFC wired up, setup DEC AIR settings, no more stalling with bov connected. yay! it does however dipto about 400-500 rpms Sometimes, but never stalls. woot looking to get intake mani prepped and emissions removed,sr20 injectors, enthalpy ecu, woot.
Final Updates
Intake Manifold emission removed and prepped by Jonathan , 370 injectors and N60 Maf installed.
Hit up Jason fro EMance and drove down to san diego, and he hooked me up with a street tune for my setup. (much better then mailing in your ecu to entalpy or something and having them try to estimate your tune.) My A/F ratios are perfect after 3 pulls on the street.
Jason also found out previous owner advanced the timing by 5 degrees... WTF???? anyways he fixed that.
Car runs great now xP lots of reliable power for a daily driver only at 5lbs :). Also keeping the apexi safc for teh DECEL settings so i can run my atmospheric BOV.
Took a while, but im glad i cleaned up my setup and did everything right, so i can now enjoy a reliable daily driver.
Thanks alot to Jonathan for prepping my engine and helping me out and referring me to Jason, and Jason of course for the tune !