I was able to get mine to flash on the first try but had not been able to reset it since then.

After reading every post here I came across a solution that worked for me again on the first try.

Test notes:
At least 25 failed attempts before new method.

Method:
Roll up all windows and shut sunroof
Turn off HVAC controls
then, run the process WITH the clutch depressed the entire time.

I used the radio (playing a CD) as my timer. Worked on the first try.

 

So does the gas pedal method work or is it bogus?

Infiniti Tech and Catafish are you saying that the battery and gas pedal method will not reset the ECU, but it will reset the "learning of the ECU?"

Or am I way off?

Thanks

 

My Service Engine Soon light came on the other day. I
noticed it yesterday evening. WTF is this....Then I thought
about what I had done to my sedan recently. I bought the
wire bundle cover from Home Depot to cover my A/C lines
around the Z-Tube to prevent any damage from rubbing or
anything. I remember playing with the MAF plug. Must have
set the SES light doing that? Anyway, I remained calm.....
Decided to do the Easy ECU rest via the pedals.
Cleared the light immediatly! It works like a champ for
clearning a Service Engine Soon light. It has not come back
on since. Whew!!!


2003 TwBlue 5AT Sedan, sunroof,
Graphite Leather, splashguards, HKS exhaust,
14 wire Grounding kit, 350Z duct, Stillen CAI
Underbody rear diffusers, Drilled alum pedals

 

the car was off when you played with the MAF, right? Was it disconnected/loose when you started the car?

If not, then you might have another problem. The reset function does not mean the problem is solved, just that the light was reset.

For instance, on my minivan, if the "Change Oil" light comes on, I can reset it by putting the car in the alt/on position and pumping the brake five times hard... light goes off. Doesn't mean I changed the oil, I just reset the light.

You might want to get it checked out, especially if the light comes back on.

Cheers, ted


'03.5 Sedan 5a: BS/G, Prem, Aero/Body, Sport, Nav
Click for MODS or Vote at Online Showoff

 

I agree with Ted, If the light reappears, it means there's a fault of some kind in the system that needs correcting. Just cancelling the CEL will not correct the fault.
G/L

<font color=red>GSM</font color=red>
<font color=red>GSM</font color=red>
<font color=black>Silverstone Coupe</font color=black>

 

<blockquote><font class="small">In reply to:</font><hr>

hrm..."up, down, up, down, left, right, left, right, a, b, start" haha, damn, is this a car or nintindo cheat code?!?!

<hr></blockquote>


Contra, right! unlimited lives!

2 G or NOT 2 G, there is no question!

Injen SES, Kinetix cats, K&N Typhoon, 19" PIAA Super Rozza's (19x9 & 19x10)

 

That is a Contra code, but not for unlimited lifes. You only get 30!

Well, yesterday I dove into the ECU reset world to see what I could find. But, first a little insight into my car:

Crawford Z services installed my Procharger about a month ago. They also installed all the Crawford parts (headers, plenum, cats), had TS do a reflash, installed 380cc injectors, added a regulator and a return on the fuel line, and a Walborough 255 fuel pump. In Nashville the car dyno’d at 380 rwhp with a nice flat a/f chart.

However, when I got the car home and dyno’d it, it only made 350 rwhp. In Dayton, the car made MORE hp at 6000 RPM (350 vs 340) but started to run lean right at this point. Once the car went lean the hp dropped off considerably. I believe that if the A/F would have stayed constant I would have easily put down 390 rwhp.

So, knowing this I figured that the ECU had mellowed out my fuel maps. I looked into resetting the ECU and found that there was as a lot of debate on what works. So, in order to test some stuff I took my car to a test and tune at the track last night.

The first, and most important, thing I learned is that my car is unlaunchable. My 60’ foot times ALL sucked. I got a total of four runs in last night and I reset my ECU using the easy brake pedal reset method in between runs 2 and 3.

1st 13.94 @104.61 (60ft 2.196)
2nd 13.66 @107.15 (60ft 2.411)
Easy ECU Reset
3rd 13.187 @ 109.25 (60ft 2.178)
4th 13.150 @ 107.65 (60ft 2.162)

As you can see my 60’ times suck. I had my stock rims/tires at stock pressures. But, they are fairly consistent. The ECU reset obviously helped performance out quite a bit, as all runs were ran in the same fashion. Sorry for the book, but I thought this was very interesting.


Kevin
www.KPtechnologies.net
AIM: KPiersonTec
04 DG Coupe / VDC Memory
OEM Remote Window up mod
Procharged / Crawford / TS

 

Great times man. Now i am Really confused. I am the only vocal one out there I know of that says the ECU reset helps performance. BUT YOU HAVE THE TS flash and I thought that was a fixed map. Does TS do multiple maps like Nissan?

I know resetting a stock ecu does something to improve perfomance but you make that case verifiable if I can figure out what TS really does to the maps. 13.9 to 13.1 is like a going from a cts to a cts-v! Highly impressive.

Hows she sound?

2003.5 DP 5AT Sedan (E-thing but Nav)
14.2 @ 97.18
Z-Tube
K&N Drop In & Airbox Mod
10 Wire Hyper-Ground
Crawford Plenum (V4)
UR Crank Pulley
Polk EX-3500 Tweeters/Shock Sensor/H-Liner

 

She doesn't sound much different then stock. Sounds like my power steering belt needs tightened though! Stupid whine!



Kevin
www.KPtechnologies.net
AIM: KPiersonTec
04 DG Coupe / VDC Memory
OEM Remote Window up mod
Procharged / Crawford / TS

 

Is there any reconciliation between the notion that TS has a fixed ECU that can't be reset and the fact that you rock when you reset. I wonder haphazardly if the reflash took?

2003.5 DP 5AT Sedan (E-thing but Nav)
14.2 @ 97.18
Z-Tube
K&N Drop In & Airbox Mod
10 Wire Hyper-Ground
Crawford Plenum (V4)
UR Crank Pulley
Polk EX-3500 Tweeters/Shock Sensor/H-Liner

 

I'm not sure what the deal is. I know my rev limiter is still at 7200rpm, and everything else seems ok. You can tell by the dyno charts that when I picked the car up in Nashville everything was cool. Then I took a long, mellow highway drive and everything is messed up. Next, I do an ECU reset and shave a constant .5 seconds off of my 1/4 mile time.

I think the evidence speaks for itself, I am just not 100% sure what it is saying!


Kevin
www.KPtechnologies.net
AIM: KPiersonTec
04 DG Coupe / VDC Memory
OEM Remote Window up mod
Procharged / Crawford / TS

 

More Haphazardness from a guy whose never changed an ECU or put in FI:

Try this on. Perhaps TS has no ability to actually FIX the ecu and your car reverts back to either stock or TS version of stock. Hopefully and apparently it's the latter for u.

What would happen if you went FI on a stock ECU. Your AF and o2 sensors would save the head right?

2003.5 DP 5AT Sedan (E-thing but Nav)
14.2 @ 97.18
Z-Tube
K&N Drop In & Airbox Mod
10 Wire Hyper-Ground
Crawford Plenum (V4)
UR Crank Pulley
Polk EX-3500 Tweeters/Shock Sensor/H-Liner

 

I'm ordring my A/F guage tonight and hopefully I'll have it in this weekend. Then I'll be able to test ECU resets and the effect they have on A/F ratios. If I run lean, reset, then run fine I would say that is definate proof that the reset does more then just diagnostic codes. If it doesn't, I'll still have my .5 second 1/4 mile improvement.



Kevin
www.KPtechnologies.net
AIM: KPiersonTec
04 DG Coupe / VDC Memory
OEM Remote Window up mod
Procharged / Crawford / TS

 

gurgen posted an awesome explanation of all this timing/fuel map business with the ECU, I wish I could find it. However no one seems to know what the implications of the ULEV2 ECU are, and TS hasn't cracked the code yet.

2004.5 Coupe/5AT/Ivory/Everything but front spoiler/Nismo CAI/Crawford V5/Crawford Cats

 

I know some speculate that ECU reset is crap. No one speculated that the TS maps would even change. Very interesting. Now the sound differences that were related to the reset when I had the injen CAI giant resonator on make sense after all.

I knew there was bunk thoery behind all the spew about the ecu resests not affecting the AF. Maybe your FI map drops down the boost and that makes most of the performance difference..otherwise you are MYTHBUSTING. Great show..

2003.5 DP 5AT Sedan (E-thing but Nav)
14.2 @ 97.18
Z-Tube
K&N Drop In & Airbox Mod
10 Wire Hyper-Ground
Crawford Plenum (V4)
UR Crank Pulley
Polk EX-3500 Tweeters/Shock Sensor/H-Liner