Welcome to the SR20 Community Forum - The Dash.
Register
SR20 forum logo

Thread: SR20VE Help Need-Ignition Timing Fighting Me - High RPM Misfire-Sounds Like Anti Lag

+ Reply To Thread
Posts: 11-20 of 68
2015-06-19 12:11:50
#11
put a nismotronic daughter board in your de ecu. load a suitable basemap.set your timing.tune. live happily ever after.
2015-06-19 12:37:35
#12
Originally Posted by sss4me
put a nismotronic daughter board in your de ecu. load a suitable basemap.set your timing.tune. live happily ever after.


Nismotronic looks the business. I am going to have the wire an IAT and a MAP sensor into the original ECU or into the daughter board?
2015-06-19 13:11:26
#13
Originally Posted by VE-Baller
Originally Posted by sss4me
put a nismotronic daughter board in your de ecu. load a suitable basemap.set your timing.tune. live happily ever after.


Nismotronic looks the business. I am going to have the wire an IAT and a MAP sensor into the original ECU or into the daughter board?


NismoTronicSA Help - MAP Sensor Installation
2015-06-19 13:28:56
#14
And the "break-out box is included with this? NismoTronicSA Package, NismoTronic - Nissan ECU Tuning

edit.

ok, read this http://www.sr20-forum.com/nismotronic/54035-nemu-adc-wiring-new-break-out-box.html

says it is.
Last edited by VE-Baller on 2015-06-19 at 13-50-19.
2015-06-19 14:36:28
#15
Originally Posted by VE-Baller
And the "break-out box is included with this? NismoTronicSA Package, NismoTronic - Nissan ECU Tuning

edit.

ok, read this http://www.sr20-forum.com/nismotronic/54035-nemu-adc-wiring-new-break-out-box.html

says it is.


yes sir.
2015-06-20 18:09:15
#16
Does the AEM hookup PRE or Post processor ???? Depending ECU talk may give you the wrong info !!!
2015-06-20 18:13:54
#17
Also take a look at the MSPNP ECU's .. They do everything and its 100% New hardware .. Not a CPU swap on 25yr old hardware that lets face it there old and failure rate is on the rise ... They also have a OBD2 PNP unit as well so no step down needed either.. Hit me up for better pricing too... Theres some discount codes I know of is what it is

http://www.diyautotune.com/catalog/megasquirtpnp-g2-ns8994-for-the-8994-nissan-240sx-manual-trans-p-504.html
Last edited by shagspeed on 2015-06-20 at 18-16-02.
2015-06-20 21:11:29
#18
Set your distributor timing to 15 or if you want some more power set it to 17-19.. Any more timing than that is too much for an SR motor, you will be pinging like crazy. So just imagine 25! wow! surprised it hasn't blown up yet!
This is called mechanical timing. Anything you change in the ecu will not change what you see with a timing light!

Not sure why the piggy back device only has ignition retard???? Should have both or only advance.. I would leave that all alone and just advance via the distributor. So 15-19 and that's it.

Nismotronic is the cats ass but it sounds like you should leave 100% of the tuning to a pro.


Ecu talk is just showing what your timing is "off the timing table in the ecu".... So at this point, its nothing to be concerned about, it uses 15deg at idle and 25/26 at WOT.
Your base mechanical distributor timing at idle should be close as possible to matching this though!

Do this and leave the rest alone.
2015-06-20 23:16:29
#19
Originally Posted by Haulin200sx
Set your distributor timing to 15 or if you want some more power set it to 17-19.. Any more timing than that is too much for an SR motor, you will be pinging like crazy. So just imagine 25! wow! surprised it hasn't blown up yet!
This is called mechanical timing. Anything you change in the ecu will not change what you see with a timing light!

Not sure why the piggy back device only has ignition retard???? Should have both or only advance.. I would leave that all alone and just advance via the distributor. So 15-19 and that's it.

Nismotronic is the cats ass but it sounds like you should leave 100% of the tuning to a pro.


Ecu talk is just showing what your timing is "off the timing table in the ecu".... So at this point, its nothing to be concerned about, it uses 15deg at idle and 25/26 at WOT.
Your base mechanical distributor timing at idle should be close as possible to matching this though!

Do this and leave the rest alone.


A VE is really hard to get to ping... I think stock timing is around 32deg .. I tune VEs to about 39deg once VVL kicks on.. The large amounts of overlap a VVL has really helps knock down pinging... I have ran as high as 45deg and still did not ping , Just lost power ... So I think set your base timing to 22deg and pull a bit of timing if it pings down low but it won't ping on the high end and add a bit of fuel to get around 12.7-12.8:1 AFR and you should be good to go..
2015-06-24 13:43:21
#20
Shagspeed - AEM is intercepting the signals coming from the sensors.

I dont see Euro P11 1997 listed for the MegaSquirt

I am tempted to go standalone. AEM EMS specifically because it is plug and play.

Haulin

Maybe I have it wrong.I thought the ECU was telling the distributor when to fire ie the distributor is just giving the ECU the signal and the ECU determines when to fire according the position. The distributor does not control when the spark fires, the ECU does.

Am I wrong???

About the ECU Talk. So that is worthless for use with a piggback ECU then correct??


An update.

When it is running properly, timing light is showing 20+ degree advance at idle.
When I get the misfire timing light shows 15 degrees advance at idle.

I think that would make sense. If the ECU pulling timing back by 5-10 degrees at idle I imagine it is doing this everywhere hence the misfire.

I set the base timing back to 15 degrees mechanically and zerod out the timing tables on the AEM. Still the same intermittent problem.

But even when it will pull to the red line, it is dog slow compared to have the mechanical timing set to 25 degrees.

Either the ECU is adjusting the timing to compensate for the base timing/FIC or I need to check the wiring.

Also, I am going to check the MAF signal , it seems the problem does not happen so often when it is cool.

Also, knock sensor. Is it possible the cam engagement is causing more noise than the SR20DE ECU is expecting and that is pulling timing???? I have just changed the Knock Sensor because it was showing a fault code, I thought that my be the issue but sadly not.

I have also tried using an SR20VE distributor and no change. Swapped out the plugs, no change.

if I had to guess I would say for some reason the ECU is pulling the timing on its own at high rpm and full throttle.

You can go part throttle to the redline with no problem, but WOT immediate hesitation. Ill check the MAF signal. No way it should be maxed out though is there on a NA VE????
+ Reply To Thread
  • [Type to search users.]
  • Quick Reply
    Thread Information
    There are currently ? users browsing this thread. (? members & ? guests)
    StubUserName

    Back to top