Nismotronic - tuning help - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

1320VR4 · 09-10-2016, 06:05 PM

Alright so super long story short I bought a nismotronic ecu as well as injectors turbo and misc other parts from the same guy. Happened to be a good package deal and I thought maybe it would be a shorter route to getting the car tuned since our setups were almost idential. 740ccs, gm map, aem wideband setup to the breakout box.

it was both a Good theory / Bad theory. Building off the existing tune he had on the ecu I have the following:

When at full operating temperature the car runs beautiful. Pulls like a raped ape, AFRs are pretty smooth, no knock. Idles fairly well. it can be inconsistent sometimes and rev up and down a few hundred rpm but inevitably it hovers around 900-1000 rpm.

When cold I have the start up corrections fixed from the previous tune (thanks to J-kerr) so the car fires right up when cold but then dies out. When the motor is anywhere from room temperature to just below operating temp, the car runs terrible. The wideband reads that the car is running super lean however it misfires and I can smell the raw fuel in the exhaust.

I've played around just jamming wild numbers in different places to see what would affect it the most and nothing really seems to change at all. Played with ECT corrections, the fuel table, SA factors, wideband factors etc. Any quick thoughts?

If anyone would like I can attach the tune file

OnTheChip · 09-11-2016, 08:55 AM

Have you checked for error codes?

1320VR4 · 09-13-2016, 08:20 PM

No doc codes present

OnTheChip · 09-14-2016, 10:08 AM

Try checking the ECT connector for corrosion.

1320VR4 · 09-14-2016, 10:09 AM

The sensor is new as of about 6 months ago and the wiring harnesses brand brand new

OnTheChip · 09-14-2016, 11:03 AM

If you can attach the tcd (tune file) and a log (tcl), I'll have a look.

09-10-2016, 06:05 PM	#1
1320VR4 Zilvia Member Join Date: Mar 2012 Location: Vernon, NJ Age: 31 Posts: 269 Trader Rating: (4) Feedback Score: 4 reviews	Nismotronic - tuning help Alright so super long story short I bought a nismotronic ecu as well as injectors turbo and misc other parts from the same guy. Happened to be a good package deal and I thought maybe it would be a shorter route to getting the car tuned since our setups were almost idential. 740ccs, gm map, aem wideband setup to the breakout box. it was both a Good theory / Bad theory. Building off the existing tune he had on the ecu I have the following: When at full operating temperature the car runs beautiful. Pulls like a raped ape, AFRs are pretty smooth, no knock. Idles fairly well. it can be inconsistent sometimes and rev up and down a few hundred rpm but inevitably it hovers around 900-1000 rpm. When cold I have the start up corrections fixed from the previous tune (thanks to J-kerr) so the car fires right up when cold but then dies out. When the motor is anywhere from room temperature to just below operating temp, the car runs terrible. The wideband reads that the car is running super lean however it misfires and I can smell the raw fuel in the exhaust. I've played around just jamming wild numbers in different places to see what would affect it the most and nothing really seems to change at all. Played with ECT corrections, the fuel table, SA factors, wideband factors etc. Any quick thoughts? If anyone would like I can attach the tune file __________________ 94 240SX, 93 Stealth, 92 VR4, 93 RX7 , 88 Yota

09-11-2016, 08:55 AM	#2
OnTheChip Zilvia Junkie Join Date: May 2013 Location: Burgaw, NC Posts: 311 Trader Rating: (0) Feedback Score: 0 reviews	Have you checked for error codes? __________________ NismotronicSA - Speed-Density Tuning for Nissans

09-13-2016, 08:20 PM	#3
1320VR4 Zilvia Member Join Date: Mar 2012 Location: Vernon, NJ Age: 31 Posts: 269 Trader Rating: (4) Feedback Score: 4 reviews	No doc codes present __________________ 94 240SX, 93 Stealth, 92 VR4, 93 RX7 , 88 Yota

09-14-2016, 10:08 AM	#4
OnTheChip Zilvia Junkie Join Date: May 2013 Location: Burgaw, NC Posts: 311 Trader Rating: (0) Feedback Score: 0 reviews	Try checking the ECT connector for corrosion. __________________ NismotronicSA - Speed-Density Tuning for Nissans

09-14-2016, 10:09 AM	#5
1320VR4 Zilvia Member Join Date: Mar 2012 Location: Vernon, NJ Age: 31 Posts: 269 Trader Rating: (4) Feedback Score: 4 reviews	The sensor is new as of about 6 months ago and the wiring harnesses brand brand new __________________ 94 240SX, 93 Stealth, 92 VR4, 93 RX7 , 88 Yota

09-14-2016, 11:03 AM	#6
OnTheChip Zilvia Junkie Join Date: May 2013 Location: Burgaw, NC Posts: 311 Trader Rating: (0) Feedback Score: 0 reviews	If you can attach the tcd (tune file) and a log (tcl), I'll have a look. __________________ NismotronicSA - Speed-Density Tuning for Nissans

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