evolutionm.net - Evo X Engine Management / Tuning Forums

Got P1870 after tuning, what gives?

LVSBB6 — Fri, 20 Nov 2009 23:42:17 GMT

I just got my car tuned and now keep getting P1870 with ASC light warning. It happens right when I upshift during WOT runs.

There were no codes during the dyno pull, only happened after on the streets at WOT during upshift.

Tried bumping up the boost and torque limit table, but didn't help much. What's the cause of this?

Dimensions of stock compressor-side boost pill?

stokEd — Fri, 20 Nov 2009 16:51:38 GMT

Does anyone know the dimensions of the stock compressor-side boost pill? Is it the same as that on the Evo 8/9? I've inadvertently disposed of mine and need to come up with a replacement. :updown:

Decisions.... Decisions.....

1BADSS/SC — Fri, 20 Nov 2009 16:31:12 GMT

So I just got my IX and have an idea of what I want out of it. Ideally, I would like a 400+ whp DD. Theres a catch though. I would like to run a 9k redline, and have the powerband hold to redline.

Ok, so Im wondering if this is possible. Secondly, would it be good as a DD. Third, Im not even sure where to start on parts lol.

Any input is much appreciated. I have looked at the stroker engines, and would prefer not to if possible. What do you guys think? Am I asking too much? :lol:

My car Hiccups!

criptballer — Fri, 20 Nov 2009 07:15:09 GMT

:helpme:So i just installed my DW1000's and i'm now running e85. im getting pretty close to dialing in my injectors, i'm at +- 2 for my LTFT but whenever my car is just idling it starts to hiccup! it feels like when you turn on your ac or when the fans kick in. but i know it's neither of those. at first it does it every 7 seconds and then it gets more frequent until its pretty much every 2 seconds. My rmps drop a bit and then my AFR's go lean for a sec and then rich, then stabilize and then the process starts all over again...:crap: other than that, i'm idling between 14.7-15.4 during cruise and idle (when it doesn't hiccup).

any ideas as to why this is happening? i've tried increasing the idle to about 950 rpms. could it be that the ecu just needs to adjust itself to e85 and its learning the new fuel? Thanks guys!

WGDC High Gear vs Low Gear

smanders — Thu, 19 Nov 2009 04:01:37 GMT

Does anyone know when the WGDC High Gear is used vs the Low Gear? I want to trim the boost back a little in the 3k-3.5k range in the Higher gears since the engine does not sweep through the RPM range as fast. I think in the Higher Gears in general the WGDC should have a faster Duty Cycle in interrupt mode to keep the boost in check. However, it would make a big difference for me as to which gears are affected in low vs high.

Anyone know?

Thanks,
smanders

Official Injector Scaling and Latency Values

goofygrin — Wed, 18 Nov 2009 04:50:01 GMT

Just to try and get this all in one place.

Here's the ones I found. If you know of others, post up and I'll update this thread.

These values are a starting point. You should watch your fuel trims and if they are going out of what then adjust these values accordingly to make sure that your car is running correctly.

DeatschWerks 1000cc (drop in, two flavors appear to be out there, one short one long like stock)
Scaling
Pump: 713
E85: 562

Latency
6.120
4.200
2.808
1.992
1.488
1.200
0.912

DeatschWerks 800cc (drop in)
Scaling
Pump: 696

Latency
5.904
5.400
2.880
1.944
1.464
1.080
0.816

Alternate (Clipse3GT):
Scaling 770

5.736
5.232
2.496
2.016
1.368
1.008
0.624

RC 750cc (pigtail required)

RC 1000cc (pigtail required)

Injector Tuning Notes (Courtesy of Clipse3GT)
1. Choose a global setting (ECUFlash injector scaling number)
2. Log trims at idle and cruise
3. If trims are roughly the same, but positive, then you need to increase your global fueling, or in terms of ECUFlash, you need to lower your injector scaling number.
4. If both trims are roughly the same, but negative, then you need to descrease your global fueling, or in terms of ECUFlash, you need to raise your injector scaling number.
5. If idle trim is more positive than cruise trim, then you need to increase the dead time, or in terms of ECUFlash, you need to increase the latency value.
6. If the idle trim is less positive than the cruise trim, you need to decrease the deadtime, or in terms of ECUFlash, you need to decrease the latency value.

NOTE: After #5 or #6, you may need to readjust #1 accordingly.

NOTE 2: Basically, let's say that the IPW is 1ms at idle and 2ms at cruise. If you adjust the deadtime to add 100us (.1 ms), then you are affecting the idle fueling 10% and the cruise fueling 5%.

Where to buy 3 PORT Solenoid Harness Connector?

Clipse3GT — Tue, 17 Nov 2009 17:54:48 GMT

I am looking for the GRAY connector in the above picture so I can solder it into my GM 3 Port solenoid harness. Does any vendor just sell a spare connector so I don't have to hack up my stock harness, and just make it all plug and play?

Any help is greatly appreciated. :)

This is for a EVO X btw. {thumbup}

misconception about tunning e85

criptballer — Tue, 17 Nov 2009 03:15:07 GMT

so I recently decided to get a set of DW 1000 cc's and switch over to e85. I decided to start doing some research on the properties of e85 compared to that of gasoline and found some interesting stuff. but when it came down to actually getting a plan together for tuning it, I could't seem to find straight answers. So I'm writing this in hope of it being useful to somebody like me that has questions as to what "afr" they should tune to.

Whenever i have a question about cars i turn to my buddy J.R. this was not an exception. i asked him what the stoich afr of e85 was and he mentioned about 9.0. so i said cool. then i started doing some research on the forums and found that some gurus were running different numbers than these. the more i read the more i got confused. some people were running 6.0 others 11's and others even 16's!:confused: well to my shock they could all be right or wrong. i did more in depth research and even ended up talking to guys at aem. turns out that the AEM widebands have a little "nob" that can be adjusted with a flat head screw driver and it gives you different readings for different purposes. now not a lot of people know this apparently, at least people i talk to. So i started thinking, those forums of the gurus never mentioned changing their calibration of the AEM wideband.

If you have a new wideband, I would highly recommend tuning with and to lambda and forget about afr's period. afr's mean nothing. i can have a perfectly stoich car at 30 afr's if i want to, all i would need to do is change the equation that the AEM wideband reads with. Interestingly enough, after reading the "how to" install article provided by AEM i found that the equation the Wideband comes with from the factory is (lambda x 14.7 = AFR) which makes sense because most people use it to tune their gasoline powered vehicles. so what does this mean excatly?.... this chart should help

so, since i bought my wideband used, i don't have the different face plates that they come with new (which should include a lambda face plate). but not to worry, it doesn't matter{thumbup}. the wideband is dumb. it doesn't know what fuel you're feeding the car nor does it care. all it cares is about lambda! and what do we know, we know that 1 lambda will always be stoich! in any fuel! it doens't matter. hence the equation, lambda x 14.7= afr. so this means that if i put e85 in my car and log it with my AEM gasoline calibrated wideband, i should still tune for 14.7 stoich!! the difference comes from the best power ratio of e85 to gas. gas is 12.5 (varies a little depending on car obviously) and i believe e85's is .7 lambda which equates to about 11.2-11.5. now as to how safe that actually is, i don't know. so i'm going to shoot for 10.8 and go from there. sorry for the quick and sloppy write up but i thought i'd share my thoughts and findings and hopefully someone benefits from it.

Attached Images

aem chart.jpg (85.6 KB)

COBB AccessPORT Challenge!

COBB Tuning — Tue, 17 Nov 2009 01:31:16 GMT

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The concept is simple. Visit COBB Tuning Plano or COBB Tuning Surgeline, purchase an AccessPORT and allow our Calibration Specialists to custom tune your ECU at no additional charge. Once the tune is complete, take your car out for a spin to feel the the results and use the AccessPORT. If you are unsatisfied in any way, we will refund the cost of the AccessPORT and return your car to the same setup you arrived with.

COBB Tuning is an automotive engineering company specializing in OEM ECU engine tuning. We develop our own hardware and software tuning tools to meet the tuning needs of the most demanding enthusiasts. We are so confident that you will appreciate the improved performance, driveability, responsiveness and features of the AccessPORT that we will stake your business on it!

So what have you got to lose? Call COBB Tuning Plano or COBB Tuning Surgeline today to schedule your COBB AccessPORT Challenge and experience why the AccessPORT is superior to all other tuning solutions . Our goal is to have you leave us knowing you have the best tuning solution money can buy. We guarantee it!

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Stopping the fuel trims affecting WOT fueling

tephra — Mon, 16 Nov 2009 06:44:28 GMT

Hi All,

Just a quick announcement to say I think I have worked out how to disable the trims affecting WOT fueling.

Thanks to Acamus for some seriously hard core disassembling :)

Ok we all know how the Fuel Trims work, basically MAFHz bins, so Low/Medium/High

Usually High isn't used, here is why:

Left is stock, Right is my modified one

So the High FT won't be used unless the MAFHz goes above 1593.75, which won't really happen on stock turbo.

So I have modified the High bin so it's lower. And thus gets used.

Now here's the best part, because of how the STFT works, the High FT should really NEVER get populated with anything OTHER than 0%.

I have done a log and you can see the High FT being used in the fueling calculations, and you can also see it being set to 0%, so now I don't have my Cruise (Med) Trim affecting WOT.

Code:





        


        Low -> Mid

        Mid -> Low

        Mid -> High

        High -> Mid

That's for 53040010, but also should work for 526800XX - If your values for above don't look very similar to mine then something's wrong.

If your interested in logging trims then find the MUT_TABLE - then you have the addresses you need to log:

MUT0F = STFT
MUT0C = LTFT_Low (Usually Idle)
MUT0D = LTFT_Medium (Usual Cruise)
MUT0E = LTFT_High (Usually not used, but that's what this MOD is all about)
MUT50 = Copy of the trim currently in affect

DISCLAIMER: DO NOT USE THIS UNLESS YOU HAVE A WIDEBAND AND LOG YOUR ECU

Cheers
D.

Cobb AP: Best way to solve this without Custom Tune

evoxkrazy — Sun, 15 Nov 2009 21:04:59 GMT

Hey guys, hopefully someone could answer this.

I have been using the AP for about 1month now, have aem intake, megan downpipe, testpipe, and dual exit megan catback

when i was running this setup i would once in awhile under very extreme driving get the service engine soon light. Problem was the P1235 Map Plausability problem

This was with the Ca/Nv/Az 91 stage 2 Aem map

2 days ago i installed hks hi-power muffler(dual mufflers)

And probably everytime i mashed the throttle to the floor, this code came on rt away.

Called Cobb, told me to update all the software and to tryout the stage 2 + aem general map (not the CA one)

The light continues to come on with the same code, Also when this happens, the car idles around 2000rpms, I could turn the car off/ clear the code and the same will happen over and over again.

!.Does the Hks exhaust have too much flow for this tune?
2. Does this happen to anyone else with similar or same setup?
3. Any suggestions?

Thanks for all the help!!!

LTFT/STFT question

xhomm02 — Sun, 15 Nov 2009 17:25:24 GMT

I found something really strange with my EVO X:

When I log my fuel trims during a long cruise (like 100km), I see LTFT in -0,25 to -3% range.

When I sum LTFT + STFT (to get total correction) in all closed loop rows and then I calculate average from all these total corrections, they are POSITIVE cca +3%!!!

How is it possible that average LTFT and average total trim are on opposite sides of zero?

I know that ECU calculates LTFT each few minutes - is the calculate value average STFT from the last period?

Thank you,
Martin.

Hesitating of course

Ried — Sun, 15 Nov 2009 17:23:54 GMT

I've read the threads about hesitating so if you guys cuss me out I understand. Just had the Greddy TIC installed and now my car is doing it. Could this be caused by the exhaust or is it a reflash issue. All I have is an AEM intake and the exhaust. I don't anticipate the dealer denying me warranty because the service writer I deal with is pretty cool but could they for those two mods? This is an f__in disaster for me because my wife is going to go nuts. I had to sell my Srt-4 because I blew the engine and nobody could figure out how to fix it. Anybody's input would be much appreciated.

Quick AP question...

Methodical4u — Sat, 14 Nov 2009 17:55:59 GMT

i'm trying to remember how to get a map that I made through Access tuner race to the AP... it shows up when I put it on the AP manager, but not on the AP when I go to flash it.

What can you do with the Cobb AP?

Phantom X Evo — Thu, 12 Nov 2009 22:06:53 GMT

What can you do with the Cobb AP? I have read some threads that mention using it to flash using different maps. I am not entirely sure what this means.

Can you get these maps from somewhere and "download" them to the ecu for tuning? The ad for the AP says you can only use with the stock intake, so I don't know what to think.

Is there a better program for flashing the ecu?