Jump to content
SAU Community

How To Advance Ur Timming ?

Brentmcd12
 Share

Recommended Posts

Brentmcd12 Enthusiast

Brentmcd12

Posted
Posted

do u goto ur mechanics and they use a controller to advance ur timming ??

after reading the service manual it says u need a diagonists controller to update ur timming ??

so only a mechanic can do this ?

im pretty sure my 25de is running rich because the exaust (extractors hiflow cat 2.5 catbak + hotdog + supercat cannon it pops and splutters when u back off the throttle or gear change ?

Link to comment
https://www.sau.com.au/forums/topic/181465-how-to-advance-ur-timming/
Share on other sites
Brentmcd12 Enthusiast

Brentmcd12

Posted
  • Author
Posted

is it possible to just advance the CAS anticlockwise and do it by ear until it pings ?? how safe is that ? lol because i dont know anyone who has one of these controllers

djr81 Grand Master

djr81

Posted
Posted
is it possible to just advance the CAS anticlockwise and do it by ear until it pings ?? how safe is that ? lol because i dont know anyone who has one of these controllers

is it possible to just advance the CAS anticlockwise

Yes.

and do it by ear until it pings

No

how safe is that

Completely unsafe

lol

:)

because i dont know anyone who has one of these controllers

Go buy a timing light. :D

Brentmcd12 Enthusiast

Brentmcd12

Posted
  • Author
Posted

obviosly...

but what i was asking was since reading the service manual it doesnt mention a timming light at ALL i have one but i have no idea where to plug it into...

it says u need a diagonistics controller and u plug into the TPS and then u plug into the unit at the back of the head... and u dial in the numbers on this unit... and then u adjust the CAS accordinly...

djr81 Grand Master

djr81

Posted
Posted
obviosly...

but what i was asking was since reading the service manual it doesnt mention a timming light at ALL i have one but i have no idea where to plug it into...

it says u need a diagonistics controller and u plug into the TPS and then u plug into the unit at the back of the head... and u dial in the numbers on this unit... and then u adjust the CAS accordinly...

Well the timing marks should be on the pulley at the front & bottom of the engine. There are usually six or so marks. Find out which is TDC & the number of degrees between them. This should be in the manual somewhere.

The timing light needs its induction loop clipped to the feed to the #1 spark plug. High voltage is better, but a good light will work off the low voltage feed.

You don't need half the shit Nissan say you do...

Brentmcd12 Enthusiast

Brentmcd12

Posted
  • Author
Posted

its heaps confusing hey...

well anyways heres wat i did as a little experiment... how safe or dangerous it might of been i dont care...

i marked up exactly up where the CAS was positioned it was about half / 3/4 of the way advanced... im running 100octane... so i fully advanced the cas as far as it could go... took it for a drive high revs 1st thru 2nd slowllyy holding them sorta thing not like power ON n then offf it seemd quicker i guess had more of a bark to the exaust note and made a few smoother and other weird noises n stuff...

and then i fully retarded the timming just to see how it went WOW 3000rpm n then nothing wouldnt rev as to speak... like it was struggling and the exuast was going crazyyy pop cittyy and they were the loudest pops ive ever herd come from it...

anyways also my idle has been kind of high and i can tell that the computer is always adjusting for it... so while the car was at a hot runnign temp i turned in the idle vac screw just a little bit so on my needle it sits at wat i believe is 800rpm..

as soon as u rev the engine and back off the idle falls to 1500 and then slowly dies to 1200 and then 1000 but u can tell its still revving a bit high... so i think by putting it to 800 like that it will fix it..

altho it will be interesting to see wat my cold starts will be like because it seemed from turning off n starting the car that it was struggling a little bit... maybey the ecu has to learn this ?

Dragonforce Rising Star

Dragonforce

Posted
Posted

Lol man,

Trial and error is an expensive way to play with engines :thumbsup:

its heaps confusing hey...

well anyways heres wat i did as a little experiment... how safe or dangerous it might of been i dont care...

i marked up exactly up where the CAS was positioned it was about half / 3/4 of the way advanced... im running 100octane... so i fully advanced the cas as far as it could go... took it for a drive high revs 1st thru 2nd slowllyy holding them sorta thing not like power ON n then offf it seemd quicker i guess had more of a bark to the exaust note and made a few smoother and other weird noises n stuff...

and then i fully retarded the timming just to see how it went WOW 3000rpm n then nothing wouldnt rev as to speak... like it was struggling and the exuast was going crazyyy pop cittyy and they were the loudest pops ive ever herd come from it...

anyways also my idle has been kind of high and i can tell that the computer is always adjusting for it... so while the car was at a hot runnign temp i turned in the idle vac screw just a little bit so on my needle it sits at wat i believe is 800rpm..

as soon as u rev the engine and back off the idle falls to 1500 and then slowly dies to 1200 and then 1000 but u can tell its still revving a bit high... so i think by putting it to 800 like that it will fix it..

altho it will be interesting to see wat my cold starts will be like because it seemed from turning off n starting the car that it was struggling a little bit... maybey the ecu has to learn this ?

Brentmcd12 Enthusiast

Brentmcd12

Posted
  • Author
Posted

i started the car this morning and because id adjusted my cold start it kicked over n run rough at 200rpm sorta thing.. but the ecu was fully correcting it the idle went up to 1200 slowly and then sat back down on 1000rpm n then sorta dropped a little bit more..

im guessing it will LEARN how to perfect this now ?

bubba Grand Master

bubba

Posted
Posted

They did..

The timing light needs its induction loop clipped to the feed to the #1 spark plug. High voltage is better, but a good light will work off the low voltage feed.

he just didn't mention the allen key bit :action-smiley-069:

R34GTFOUR Mentor

R34GTFOUR

Posted
Posted

On older cars, especially ones with dizzys, you connect the timing light onto the igntion lead that goes to the first spark plug. Our engines work off indiviual coil packs, they dont have leads. There is a special white wire in your harness near the back of your motor that you are meant to connect the timing light to, to get a correct reading.

Since this is an n/a engine, ping isnt going to be a devestating to you so even if it sounds dodge trial and error can work if you do it right. With out knowing anything about your setup, so i can be held responsible, but a rough guide would be to have the cas at around 3/4 and it should be okay. My bro runs his maxed out on his rb25de but it never pings, so see what happens.

R34GTFOUR Mentor

R34GTFOUR

Posted
Posted

also with the idle, the motor wont learn to adjust the idle. When you advance ignition timing the idle increases, and vice versa. There is an idle adjustment screw on the throttle body to adjust the idle correctly, once you have the right timing dialed in then adjust your timing to suit.

Brentmcd12 Enthusiast

Brentmcd12

Posted
  • Author
Posted

yeah i tryed the CAS on max went the same i think ??

my cold starts have adjusted themself so it fires up at 1000 - 800rpm.

ummm

ill go have alook for this white wire now..

wont the fuel econonmy be shit if i run around with the CAS on max ?

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • The king 2.0
      Nissan fuga 450gt android screen

      By The king 2.0 · Posted

      It is a kunfine Android screen . Does anyone know the wirering diagram of the fuga ??
    • Nizzy_R34
      r34's love to squeal

      By Nizzy_R34 · Posted

      just an update to this, poor man pays twice  Tried sanding down the pulleys but it didnt do the trick. Chucked another second hand alternator in the na car which I got for free off my mate and its fixed the squelling. Must have been unlucky with the bearings.    As for my turbo car, I managed to pick up a cwc rb alternator conversion bracket + LS alternator for 250 off marketplace, looked to be in really good nick. Installed it , started the car and its not charging the battery.... ( Im not good with auto elec stuff so im not sure if this was all I needed to do but I verified such by using a multimeter on the battery when the engine was running and I was only getting 12.2v )   I had to modify the earth strap for the new LS alternator , factory earth strap was a 10mm bolt which did not fit the bolt on the LS alternator which was double the size so I cut it off , went to repco bought some ring terminals that fit, crimped it onto the old earth strap and bolted it up to the alternator , started the car and same issue. Ran like shit and was reading 12.2 at the battery.  For a "plug and play" advertised kit thats not very plug and play but alas.  My question is , am I missing something ? Ive been reading that some people recommend upgrading the stock 80 amp alternator fuse to a 140 amp but I dont see how that would stop the alternator charging especially at idle not under load.  Regardless ive pulled it out and am going to get it bench tested by an auto elec tomorrow but it would be handy to know if ive missed something silly or have done something wrong.   
    • Duncan
      Engine sputter

      By Duncan · Posted

      My wild guess is that you have popped off an intake pipe....check all of the hoses between the turbo and the throttle for splits or loose clamps.
    • Duncan
      S1 Autech 260RS Wiring Diagrams

      By Duncan · Posted

      Awesome, thanks for sharing!
    • Duncan
      Nissan fuga 450gt android screen

      By Duncan · Posted

      To provide more specific help, more information is needed. What Android screen? What is its wiring diagram? Does the car's wiring have power at any required BAT and ACC wires, and is the loom's earth good?
×
×
  • Create New...