*NOOBIES* The "I am new here,but have a question" thread..(post your questions here)
#363
ima check the the vac hoses/ had the car for over a year now and its been doing this idle thing/ a mechanic did tell me it could be a vac leak. whats IAC? anyone know or have a MSD kit for thier VG i heard it really adds power.
#364
IACV = idle air/adj ctrl valve
One difference to a leak: ECU uses IACV when trying to adjust rpm to a pre-fixed level. When IACV -steppermotor jams, it is always kinda 'late', cranking idle down as it shoul be driving up etc... causing fluctuating idle - especially after rpm's drop down.
Typical a leak is constant. Exceptions exist.
- this page sucks = why no pics allowed?
One difference to a leak: ECU uses IACV when trying to adjust rpm to a pre-fixed level. When IACV -steppermotor jams, it is always kinda 'late', cranking idle down as it shoul be driving up etc... causing fluctuating idle - especially after rpm's drop down.
Typical a leak is constant. Exceptions exist.
- this page sucks = why no pics allowed?
Last edited by Wiking; 02-16-2008 at 02:16 AM.
#366
IAC = Idle Air Control
stop thinking about upgrades until you have the car running perfectly.
you check for vacuum leaks first and then once they are all found you start playing with other things via the instructions in the Factory Service Manual
stop thinking about upgrades until you have the car running perfectly.
you check for vacuum leaks first and then once they are all found you start playing with other things via the instructions in the Factory Service Manual
#370
#372
vacum line help
I have a 90se with 5 spd. Need to know where the vacum line at the end of the top fuel rail goes.This is the small line at the end where there is a round object attached to the fuel rail with two screws.Don't know what this round object is called cant find it in my repair manual.I am changing fuel injectors and did not notice where it was connected or if it was connected some where.
#375
take some propane in a little bottle with a hose and wand. open the valve on the propane and wave the wand around in a careful and methodical fashion. If at any point the engine RPM raises you have found the location of your vacuum leak. You may have to stick the wand under the plenum to find the leak.
#376
yes there is.
take some propane in a little bottle with a hose and wand. open the valve on the propane and wave the wand around in a careful and methodical fashion. If at any point the engine RPM raises you have found the location of your vacuum leak. You may have to stick the wand under the plenum to find the leak.
take some propane in a little bottle with a hose and wand. open the valve on the propane and wave the wand around in a careful and methodical fashion. If at any point the engine RPM raises you have found the location of your vacuum leak. You may have to stick the wand under the plenum to find the leak.
But thats just me..
#377
#379
#381
And IMHO..Using propane on a vg (POSSIBLE OLD PLUG WIRES LEAKING SPARK) is a big...BIG nono..
Last edited by Greeny; 02-16-2008 at 06:51 PM.
#382
actually it is quite safe to use, use it at the shop all the time with no issues.
#383
I have a 90se with 5 spd. Need to know where the vacum line at the end of the top fuel rail goes.This is the small line at the end where there is a round object attached to the fuel rail with two screws.Don't know what this round object is called cant find it in my repair manual.I am changing fuel injectors and did not notice where it was connected or if it was connected some where.
#384
the thing is the Power Valve Actuator
see http://www.cardomain.com/ride/748507/3 for more info.
see http://www.cardomain.com/ride/748507/3 for more info.
#385
has any one don a GAB (ghetto air box) mod like those 4th gen cheap a** did?
http://www.youtube.com/watch?v=T2vTI...eature=related
http://www.youtube.com/watch?v=T2vTI...eature=related
#386
My car shakes as if it needs a tune up when the rpm is going back down when I am at a full stop.When the rpm goes down to normal (800) the shaking stops.The shaking is Almost like when you start to lift you foot off the clutch without giving it enough gas. Could this also be due to a vac leak?
#387
has any one don a GAB (ghetto air box) mod like those 4th gen cheap a** did?
http://www.youtube.com/watch?v=T2vTI...eature=related
http://www.youtube.com/watch?v=T2vTI...eature=related
#388
not exactly sure what they did there... did they cut a hole on the filter box? I did see a 3rd gen page a while back about cleaning up the intake, including cutting holes in the box(pre filter, of course. I modified that by only taking out the piping between the filter box and the headlight. better sound, and a little better pickup. may not be as good as a CAI, but its cheaper.
like a pop charger but not round using only the stock filter
#389
Engine swap injector difference 94 to 91
I am swapping a 91 vg30e into my 94 gxe. The 91 was totaled but had a great running engine. My 94 engine has a rod knocking and had severe blow by. With the 91 engine on the ground I am replacing the front and rear crank seals, cam seals, timing components, water pump and thermostat. All is going well except the injectors have different connectors. I have read much, by searching, about the different injectors. However, I simply would like to swap the fuel rails, with injectors, from my original engine to the replacement engine. The injectors on the original engine ran great and didn't leak. Will this work? My concern relates to an engine swap in did in my 91 300zx ( I know the motor is different). On my 300zx the newer injectors required a different fuel rail which required a different intake. I was hoping this would not be the case on the vg30e. Thanks for any help. Tim Stover
#390
I am swapping a 91 vg30e into my 94 gxe. The 91 was totaled but had a great running engine. My 94 engine has a rod knocking and had severe blow by. With the 91 engine on the ground I am replacing the front and rear crank seals, cam seals, timing components, water pump and thermostat. All is going well except the injectors have different connectors. I have read much, by searching, about the different injectors. However, I simply would like to swap the fuel rails, with injectors, from my original engine to the replacement engine. The injectors on the original engine ran great and didn't leak. Will this work? My concern relates to an engine swap in did in my 91 300zx ( I know the motor is different). On my 300zx the newer injectors required a different fuel rail which required a different intake. I was hoping this would not be the case on the vg30e. Thanks for any help. Tim Stover
#391
I am swapping a 91 vg30e into my 94 gxe. The 91 was totaled but had a great running engine. My 94 engine has a rod knocking and had severe blow by. With the 91 engine on the ground I am replacing the front and rear crank seals, cam seals, timing components, water pump and thermostat. All is going well except the injectors have different connectors. I have read much, by searching, about the different injectors. However, I simply would like to swap the fuel rails, with injectors, from my original engine to the replacement engine. The injectors on the original engine ran great and didn't leak. Will this work? My concern relates to an engine swap in did in my 91 300zx ( I know the motor is different). On my 300zx the newer injectors required a different fuel rail which required a different intake. I was hoping this would not be the case on the vg30e. Thanks for any help. Tim Stover
#392
the thing is the Power Valve Actuator
see http://www.cardomain.com/ride/748507/3 for more info.
see http://www.cardomain.com/ride/748507/3 for more info.
#393
The vacum line I'm talking about is under the plemum.It is at the end of the top fuel rail.It has a larger rubber line coming in from the fire wall side that is to the right of the fuel line coming from fuel filter.This line connects to a round metal piece that is connected to fuel rail. This round piece also has a small rubber line at the opposite end of the the larger one.This is the line I can not find a place for it to connect to. I assume this is a vacum line. I have looked at these pics before but could not find what I was looking for.It might be there I just dont see it. Thanks for your help.
I will get you a picture of where the vacuum line goes to either tonight, or in the morning..
#394
The vacum line I'm talking about is under the plemum.It is at the end of the top fuel rail.It has a larger rubber line coming in from the fire wall side that is to the right of the fuel line coming from fuel filter.This line connects to a round metal piece that is connected to fuel rail. This round piece also has a small rubber line at the opposite end of the the larger one.This is the line I can not find a place for it to connect to. I assume this is a vacum line. I have looked at these pics before but could not find what I was looking for.It might be there I just dont see it. Thanks for your help.
#395
VG30 goodness
Alright, Moderators, I am post-whoring. This 15 post thing is getting old and I would like to share some beautiful pics of my professionally ported VG heads. Here's a teaser...oh wait, I can't even put a picture up. Am I missing something?
#396
Not in here..
Go here---> http://forums.maxima.org/forumdisplay.php?f=65 post a few nice comments about a few cars..
Then read this sticky---> http://forums.maxima.org/showthread.php?t=377037
#400
thanks