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  1. #81
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    Sweet, I'm glad this thing can still help
    00 G20t KH3- Loller Rocker + GT28 + 6 Speed
    05 Legacy GT - Big 16G @13psi + Up Pipe + Downpipe
    12 Outback 2.5i Premium - Stock

  2. #82
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    thank it was helpful

  3. #83
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    Now I'm new to these cars And by iac sensor u mean the sensor on the side of the intake manifold on highport motors? To adjust it's the screw thats on top of that sensor? I'm just havin the same prob as u guys are.
    860 CT ALLMOTOR VE

  4. #84
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    What are your problems?

  5. #85
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    Well I just did my timing exaclty how it sayes to do on here and I reved it to 3k 3 times and it went down right away to around 1200 1500. Is it suppose to lock at 3k and you adjust your timing oorrr do you let it drop to to around 1000 and then adjust your timing??
    860 CT ALLMOTOR VE

  6. #86
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    And also is the sensor on the side of the intake manifold on a highport motor were the adjustment is made for idle control? That big screw on top of the sensor do u adjust that?
    860 CT ALLMOTOR VE

  7. #87
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    Its perfect now thanks Viprdude. I adjusted the timing like it sayes on here but ran into high idle prob so I adjusted the iac at the same time to get it down to 1,500 when tuning it. Now it idles around 800 and timing is at 18-19degs. I would say that iac is gotta be the biggest problem people have on here with getting an accurate reading.
    860 CT ALLMOTOR VE

  8. #88
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    Dope! Must do!

  9. #89
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  10. #90
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    Default How to: Adjusting Ignition Timing

    Damn this is great


    Sent from my iPod touch using Tapatalk

  11. #91
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    I recently replaced my failed distributor and figured I'd check and adjust my timing afterwards. Great write up and very easy to follow instructions. However, once I had warmed up the vehicle and disconnected the TPS sensor, my idle dropped down to like 500rpm. I thought it was maybe going to stall but it didn't. I tried to adjust and turn the idle screw on the IAC but it didn't appear to change anything. Granted it's also plastic that dumb screw and mine looks a bit chewed up from the previous owner.

    Could it mean that I have a bad TPS sensor? Or bad IAC Valve i.e. the idle screw adjustment. When I did check the timing it appeared to right around 15 degrees so I think I'm okay with that. Also, when you mention making marks on the distributor for different degrees, do you need to repeat this procedure to change it? Or could you simply loosen the distributor with the car off and turn it changing the timing?

  12. #92
    B15 rebuild underway!!
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    Quote Originally Posted by JCheong04 View Post
    I recently replaced my failed distributor and figured I'd check and adjust my timing afterwards. Great write up and very easy to follow instructions. However, once I had warmed up the vehicle and disconnected the TPS sensor, my idle dropped down to like 500rpm. I thought it was maybe going to stall but it didn't. I tried to adjust and turn the idle screw on the IAC but it didn't appear to change anything. Granted it's also plastic that dumb screw and mine looks a bit chewed up from the previous owner.

    Could it mean that I have a bad TPS sensor? Or bad IAC Valve i.e. the idle screw adjustment. When I did check the timing it appeared to right around 15 degrees so I think I'm okay with that. Also, when you mention making marks on the distributor for different degrees, do you need to repeat this procedure to change it? Or could you simply loosen the distributor with the car off and turn it changing the timing?
    If your idle and acceleration is fine with the TPS hooked up and then almost stalls when you unhook it, the TPS should not be the problem. IACV or fast-idle adjust may be an issue....

    I'd be tempted to bump the idle up a bit closer to 750 rpm (+/- 50 rpm) and then re-check the timing. You can use the fast-idle adjust on the TB to slightly raise the idle or you can cheat and shove a screw driver against the TB stopper to temporarily raise the idle to appx. 750 rpm, while you re-check the timing with a timing light.

    The marks on the distributor are for quick reference so that you don't have to use the timing light every time you adjust your mechanical ignition timing. You absolutely do need to put the car in timing mode each and every time you adjust via the distributor. Personally, the marks on the dist. don't really save you much time as it only takes a few seconds to go one step further and hook up the timing light. I use a light each and every time, just to be sure.

    On a side note, if you are curious about the functionality of your TPS, put a volt meter on it. Check the output voltage at closed throttle, throughout the entire range of the throttle plate opening and for WOT as well. You can check the values for closed and WOT against values stated in the FSM for your car.

  13. #93
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    Quote Originally Posted by Kyle View Post
    Quote Originally Posted by dfddfd2 View Post
    Please read my posts in this thread:
    timing keeps fluttering while trying to set it

    Thanks,
    Dave
    My neutral switch does work correctly. I know the pulley is not separated from the balancer inside the pulley.

    I can mess with the IACV screw and drop my idles down but I can do this so much as to make my timing drop as well. What the hell is the point in moving the dizzy when I can screw the IACV all the way down and make my timing correct this way? (see what I mean)

    I am gonna use a Consult unit I think to recheck it.
    I know this is old and you already found the solution instead using the good old rain dance method

    Actually its a combination of the two they both go hand in hand when setting base idle and base timing, you will need to mess with the IACV to obtain for a B13 800rpm @ idle @ 15degree.....once base idle and timing are done correctly if using the consult method or Nissan Datascan when you go to hit the bottom to set base idle you will not notice a difference in the idle rpm.


    p.s. very important to hit the mark of 800rpm and at least hit 20% AAC Duty while at 15degree timing.

  14. #94
    TunerCode, it's OnTheChip
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    Idle duty is fixed (at 20% for B13) while in "set timing/idle speed" mode. Revving the engine (aka "rain dance") is not necessary to enter "set timing/idle speed" mode.

    Dave
    Likes Kyle, Boostlee, BenFenner Liked this post
     
    NismotronicSA Tuning Package/Powered by TunerCodeSA
    Speed-Density Tuning for Nissans

  15. #95
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    That whole "rain dance" is merely a system "check" (as you can see in the FSM procedure) to make sure your car is not a vacuum leaking POS.

    Via dyno, the dyno operator and I adjusted timing simply via unplugging the TPS, and checked with a timing light for the crank pulley hash marks and adjust accordingly. No rain dance required, I have tried to spread that little gem since the "rain dance" is so widely known.

    However, I utilize a combonation of Nismotronic/NEMU for one car and consult via Nissan DataScan v1.4 freeware for the other three cars without a kick-ass NEMU ECU.

    Mr. Dunn already touched on the other part I would have addressed so cheers!

  16. #96
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    Quote Originally Posted by OnTheChip View Post
    Idle duty is fixed (at 20% for B13) while in "set timing/idle speed" mode. Revving the engine (aka "rain dance") is not necessary to enter "set timing/idle speed" mode.

    Dave
    I wasn't sure it was actually locked at 20% when in "timing mode" but I came to the conclusion it was because out of timing mode I was able to get my setup to to show 20-22% while at normal idle, and basically when I enter "timing/idle speed" mode there is no change now, but if you where to be way outta wack you would notice a big change, here are 2 videos but this after getting everything set right.



    - - - Updated - - -


  17. #97
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    What mods could potentially affect your timing/when should you re-check your timing (besides the totally obivious)?

    Sent from my SGH-T599N using Tapatalk

  18. #98
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    Quote Originally Posted by thaessential View Post
    What mods could potentially affect your timing/when should you re-check your timing (besides the totally obivious)?

    Sent from my SGH-T599N using Tapatalk
    Underdrive crank pulley. Messing with cam gears. Wiring aftermarket ignition setups. ECU reflash or upgrade. Lots of stuff.
    Jordan
    '98 SE-R, '00 G20t VVL, '12 Versa Hatchback, '17 Juke Nismo autotragic
    Music - - My SR20 website

  19. #99
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    Default Re: How to: Adjusting Ignition Timing

    Quote Originally Posted by Storm88000 View Post
    Quote Originally Posted by thaessential View Post
    What mods could potentially affect your timing/when should you re-check your timing (besides the totally obivious)?

    Sent from my SGH-T599N using Tapatalk
    Underdrive crank pulley. Messing with cam gears. Wiring aftermarket ignition setups. ECU reflash or upgrade. Lots of stuff.
    I guess it is fairly obvious. Anything that effects ignition timing. Duh. But actually, wouldn't there be a possibility of something effecting the advance only that may not be so very obvious at first?

    Sent from my SGH-T599N using Tapatalk

  20. #100
    Oh well....
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    I suppose so, maybe here and there, depending on the modification, it if more air is taken in or more fuel can be absorbed or less, the ECU can and will sometimes alter to adjust..
    Jordan
    '98 SE-R, '00 G20t VVL, '12 Versa Hatchback, '17 Juke Nismo autotragic
    Music - - My SR20 website

 

 
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