ecotec fuel mystery SOLVED!!!!!!!! - Tuning Forum

Forum Post / Reply
You must log in before you can post or reply to messages.
ecotec fuel mystery SOLVED!!!!!!!!
Friday, June 23, 2006 5:21 PM
ok so I broke down, gave up on my MegaSquirt build, and bought HP tuners.

best friggin $650 I've ever spent in my life!

but anyway, on to the findings:

problem: my 03+ ecotec boosted/ modified car keeps leaning out no matter how much pulsewidth/fuel pressure I add! what gives?

cause: delving in the programs of ecotec ecus, and having HPT at my disposal, as well as their .bin and .hpt resources, I compared an 02 and 04 ecu on the computer.



solution: under the ENGINE tab, and the fuel control, you'll see power enrichment PE enable



as you can see, the power enrichment table isn't engaged until 6200rpm so yes for those last 300rpm we have open loop haha

bring that sob down... I reprogrammed mine for 500rpm... now under wide open throttle, i have open loop air/fuel ratio constants <3 <3 <3






Re: ecotec fuel mystery SOLVED!!!!!!!!
Friday, June 23, 2006 6:37 PM
isnt 500 a bit low? like economy would suck?I really dont think you care about gas milage anyways. But If you did I would set it for like 3100rpms.

So, was that for the 02 or 04 ECU?


1971 camaro 427 --- here!

Stock... and loving every minute of it.
Re: ecotec fuel mystery SOLVED!!!!!!!!
Friday, June 23, 2006 6:45 PM
The '98 2200 that we played with had PE kick in at 5000, and we thought that was ridiculous! I'd set it at around 3200 or so, you don't want to be in PE mode for all kinds of driving, I'm assuming you only set it so low for comparison purposes though. My '01 LD9 had PE kick in at 3400 stock, that almost seems like GM made a mistake in the program for those cars?


15.3 @ 89.97mph, 14's on the way?
Re: ecotec fuel mystery SOLVED!!!!!!!!
Friday, June 23, 2006 7:33 PM
you guys forget, PE is only engaged if the following circumstancs are met:

RPM, and throttle position.

so yes, my PE engages anything above 500, but only if i'm WOT





Re: ecotec fuel mystery SOLVED!!!!!!!!
Friday, June 23, 2006 9:22 PM
I CALLED IT ALL ALONG! I'VE BEEN SAYING FROM DAY ONE THAT THERE WAS SOMETHING WEIRD ON THE 04 ECU AND NOW I AM PROVEN RIGHT. I LOVE IT!!!

THANKS PJ



I used to race cars, now I race myself.
5K PB: 24:50
10K PB: 54:26
Re: ecotec fuel mystery SOLVED!!!!!!!!
Friday, June 23, 2006 9:25 PM
schweet!


N2O + Bolt-ons = 220Hp/250Tq

Coming Soon:HpTunersPro, EagleConnectingRods, WiescoPistons, 13sec2200

Re: ecotec fuel mystery SOLVED!!!!!!!!
Friday, June 23, 2006 9:33 PM
the 02 eco File I'm looking at is set to 5600........ and the 03 at 6300 (both are 5speeds)

Never understood why its set so high...... maybe thats why their only 140hp......




SPD RCR Z - '02 Z24 420whp
SLO GOAT - '04 GTO 305whp
RACER X - '78 Opel Kadett W41 Swap

Re: ecotec fuel mystery SOLVED!!!!!!!!
Friday, June 23, 2006 9:47 PM
My 03 Stock tune was at 6200rpm also, and its an early year 03.


___________________________________________________________________

15.149 @ 91.26mph 3-18-2006
Re: ecotec fuel mystery SOLVED!!!!!!!!
Friday, June 23, 2006 10:36 PM
i second it, the absolutely best 650 i have ever spent...worked for 4 hours today tunning my car and i couldnt ask for anytinhg better pulls harder then ever. and 7000 rpm redline wow i love reving it out.



MY 2003 SUNFIRE 15.33@88.5mph

"A N/A ecotec is not gonna give Honda's and Mitsu's that much of a run for their
money unless their blown or bottle fed.GM is still smokin crack!"
~1QWKZ24
www.streetracing.org, 08/2001
Re: ecotec fuel mystery SOLVED!!!!!!!!
Saturday, June 24, 2006 3:23 AM
^^ did you update to 2.1.11 beta code? it keeps the ignition timing advancing past 6400rpm... if you didn't, i suggest you do car pulls even better since timing doesn't ramp out after 6400





Re: ecotec fuel mystery SOLVED!!!!!!!!
Saturday, June 24, 2006 6:12 AM
i have a feeling we're going to be seeing some major shifts in the N/A Ecotec 1/4 mile honor roll list soon




Arrival Blue 04 LS Sport
Eco
Turbo
Megasquirt
'Nuff said

Re: ecotec fuel mystery SOLVED!!!!!!!!
Saturday, June 24, 2006 6:38 AM
I just cant wait to see people push the ECO's revving capabilities... 7,000 now... Somebody will be pushing the envelope on that too lol.


<img src="http://memimage.cardomain.net/member_images/3/web/831000-831999/831395_11_full.jpg">

Re: ecotec fuel mystery SOLVED!!!!!!!!
Saturday, June 24, 2006 7:30 AM
id go to 7500 if i could, but im not confident the engine will hold up to that, it would be the perfect shift point for my power curve though



1989 Turbo Trans Am #82, 2007 Cobalt SS G85





Re: ecotec fuel mystery SOLVED!!!!!!!!
Saturday, June 24, 2006 8:22 AM
I'm thinking about staying n/a a little longer and rocking the patriot stage 2 head (i know lots of people dont like them) but that will give me better V.E. and better hp up top. I know the stage 2 would kind of be detrimental to bottom end torque, but thats ok I want to focuse on upper mid range and high end power. Thinking about re timing my cams so that they'll make peak power higher in the rpm band too with GM adjustable cam gears. Not sure what patriots cams are good for or what kind of power you're lookin at I geuss I'll contact them when I'm ready.

Scarab (Jersey Jay 1.8T) wrote:

i have a feeling we're going to be seeing some major shifts in the N/A Ecotec 1/4 mile honor roll list soon

you got that right buddy






Re: ecotec fuel mystery SOLVED!!!!!!!!
Saturday, June 24, 2006 8:24 AM
Ben Brown wrote:

I just cant wait to see people push the ECO's revving capabilities... 7,000 now... Somebody will be pushing the envelope on that too lol.


Well now that my Patriot head is finally going on...my new redline will be 7200 for starters



I used to race cars, now I race myself.
5K PB: 24:50
10K PB: 54:26
Re: ecotec fuel mystery SOLVED!!!!!!!!
Saturday, June 24, 2006 8:51 AM
Last night I fine tuned my fuel curve using High RPM VE table, now at WOT my AFR is sticking right on the 12.5 line from 3800 to 6500, vs the 10.3-11.7 afr it was running in there before. Next Ill hit that lower rpm table and do the same for 3000 up, Im going to the track later on today, I would like to get some dyno time and actually see if there are any gains.


___________________________________________________________________

15.149 @ 91.26mph 3-18-2006
Re: ecotec fuel mystery SOLVED!!!!!!!!
Saturday, June 24, 2006 9:01 AM
That's awesome guys, I havn't gotten to any fuel stuff yet, but once I get some spare time it'll be time to sort that out.


15.3 @ 89.97mph, 14's on the way?
Re: ecotec fuel mystery SOLVED!!!!!!!!
Saturday, June 24, 2006 9:25 AM
i have to burn off the rest of this regular gas crap and put some 93 in there

then i can finally start messing with timing.. but i'm not touching fuel until i grab a wideband o2






Re: ecotec fuel mystery SOLVED!!!!!!!!
Saturday, June 24, 2006 9:56 AM
Quote:

I CALLED IT ALL ALONG! I'VE BEEN SAYING FROM DAY ONE THAT THERE WAS SOMETHING WEIRD ON THE 04 ECU AND NOW I AM PROVEN RIGHT. I LOVE IT!!!


Yep... and I said it was most likely staying in closed loop longer. It's just GM trying to get better fuel economy ratings.

-->Slow
Re: ecotec fuel mystery SOLVED!!!!!!!!
Saturday, June 24, 2006 10:20 AM
Wow.... that's awesome! So now I know what to do once I start modding.........


1971 camaro 427 --- here!

Stock... and loving every minute of it.
Re: ecotec fuel mystery SOLVED!!!!!!!!
Saturday, June 24, 2006 6:19 PM
TheFlyingSquirrel (PJ) wrote:

^^ did you update to 2.1.11 beta code? it keeps the ignition timing advancing past 6400rpm... if you didn't, i suggest you do car pulls even better since timing doesn't ramp out after 6400


i was only able to tune up to 6000 i had to dl one the latest patches bc the 2.1.11 didnt work on my car right away they had to add my calbiration...i havent been able to log anything yet bc i went out right after i was done yesterday. but i felt a complete difference and so did my friends



MY 2003 SUNFIRE 15.33@88.5mph

"A N/A ecotec is not gonna give Honda's and Mitsu's that much of a run for their
money unless their blown or bottle fed.GM is still smokin crack!"
~1QWKZ24
www.streetracing.org, 08/2001

Re: ecotec fuel mystery SOLVED!!!!!!!!
Saturday, June 24, 2006 9:28 PM
does anyone have the 2.1.11 they can send me. I guess you need to have HPT registered to your car in order to download it. I'm in afghanistan right now and cant register my car with the program.


~Riki

SPONSORED BY: No one!
Car Domain Site
Re: ecotec fuel mystery SOLVED!!!!!!!!
Saturday, June 24, 2006 10:25 PM
rev'd out to 6988 rpms and the car still rides fine ..i gota pic of it from the hp scanner. other notes....

Gear- 1st
MAP- 96
RPMs- 6988
Speed- 35mph
Knock Retard- 0
Timing Advanced- 15.0
TPS- 33%??? (i was full throttle)
ECT-187
IAT- 77*



MY 2003 SUNFIRE 15.33@88.5mph

"A N/A ecotec is not gonna give Honda's and Mitsu's that much of a run for their
money unless their blown or bottle fed.GM is still smokin crack!"
~1QWKZ24
www.streetracing.org, 08/2001
Re: ecotec fuel mystery SOLVED!!!!!!!!
Saturday, June 24, 2006 11:00 PM
can someone send me a stock file for a 03-05 eco perferable 04-05 i want to compare



1989 Turbo Trans Am #82, 2007 Cobalt SS G85





Re: ecotec fuel mystery SOLVED!!!!!!!!
Saturday, June 24, 2006 11:19 PM
i have an 03 on this pc



MY 2003 SUNFIRE 15.33@88.5mph

"A N/A ecotec is not gonna give Honda's and Mitsu's that much of a run for their
money unless their blown or bottle fed.GM is still smokin crack!"
~1QWKZ24
www.streetracing.org, 08/2001
Forum Post / Reply
You must log in before you can post or reply to messages.

 

Start New Topic Advanced Search