Need help with fuel map | AEM
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Crazy3rdgen
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Joined: 08/01/2015 - 08:44
Need help with fuel map

I went ahead and set up my aem v1 for the most part as Jonathan Faskings suggested through his youtube vids.  The odd part is my fuel map is way off, it shouldn't like it is right check it out, almost goes inverted?.  How can I upload my cal?  Here is a screen shot of my fuel map graph.

 

Crazy3rdgen
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Last seen: 3 years 10 months ago
Joined: 08/01/2015 - 08:44
I know it needs a lot of work

I know it needs a lot of work but it got me up and going.  Thats all I tuned for and some light boost pulls.

mdlimy
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Joined: 08/06/2015 - 11:00
I have never seen anything

I have never seen anything like this...but i have a hunch.

So obviously your Injector pulse widths (these are the values you are seeing in the boxes) are decreasing as your load/rpm increases. This is opposite of what they should do.

If you are still seeing good afr readings as you climb in load/rpm there is only one explination, and that is rising fuel pressure. If you raise fuel pressure without increasing injector pulse widths you still inject more fuel, so my conclusion is that you are probably using a rising rate fuel pressure regulator and it is setup completly wrong.

Post some specs on the motor, including injectors, fuel pump, fpr etc....

Crazy3rdgen
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Joined: 08/01/2015 - 08:44
Ok yeah I see how you would

Ok yeah I see how you would think that but from the getgo check out the fuel table simply at idle, my PW at idle on the table is the same PW at near WOT, I checked my duty cycles and at idle its very low, like 1% normal, and near WOT its 80% ish.  Something is completely off here making me have to set a crazy pw for idle.  Set up.. basically a bone stock non vvti 2jz, jdm 440cc inj, mkiv fuel pump, stock fuel rail, intake, throttle body, stock fuel lines plumbling regulator.  Only thing different from factory is it has a big single on it.  I'm posting a link to DL my CAL file, i just tried the link and it worked for me, if it doesn't let me know and I'll find another way.  AEMPRO btw.  I'd really appreciate you take a look and just see if something stands out.  I set my fuel boost trims just like many people do, pulling some fuel in vac, adding fuel in boost.  My fuel map graph is hysterical. 

 

http://www.filedropper.com/progressv111

mdlimy
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Last seen: 4 years 11 months ago
Joined: 08/06/2015 - 11:00
To me it apears that your

To me it apears that your boost fuel correction table is the issue. It is not adding just a little, its adding alot. Set it at 0 all the way accross and tune without it. In my opinion it should only be used to aid the tune, not rely on it. It can be beneficial in some situations but i have never found the absolute need for it. In your case you should defenitly just turn it off for now.

Just to give you an idea, at about 10psi of boost your trim is adding 100%, which is double what your fuel map fixed value is.

Crazy3rdgen
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Last seen: 3 years 10 months ago
Joined: 08/01/2015 - 08:44
mdlimy wrote:

mdlimy wrote:

To me it apears that your boost fuel correction table is the issue. It is not adding just a little, its adding alot. Set it at 0 all the way accross and tune without it. In my opinion it should only be used to aid the tune, not rely on it. It can be beneficial in some situations but i have never found the absolute need for it. In your case you should defenitly just turn it off for now.

Just to give you an idea, at about 10psi of boost your trim is adding 100%, which is double what your fuel map fixed value is.

That is how so many people set it up, supposedly for better resolution. I'll take out all fuel boost correction and see what happens. I just hope nothing else is causing fuel correction cause I've been digging deep in the settings and can't seem to find anything else. And the log viewer isn't that great at all

Crazy3rdgen
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Last seen: 3 years 10 months ago
Joined: 08/01/2015 - 08:44
Alright so installed the v1

Alright so installed the v1.19 firmware to the ecu and installed the 1.19 factory map sensor map which was kinda close.  For some odd reason my IAC stays open at throttle and I checked my settings which shows it should be closed ya know abover a certain TPS % as well as rpm.  So odd, so I went ahead and plugged the IAC and started tuning without it.  Then somehow my serial cable started having connectivity issues.  Gonna order a different one.  But my fuel map is completely different with that fuel boost correct flatlined.

mdlimy
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Last seen: 4 years 11 months ago
Joined: 08/06/2015 - 11:00
Crazy3rdgen wrote:

Crazy3rdgen wrote:

Alright so installed the v1.19 firmware to the ecu and installed the 1.19 factory map sensor map which was kinda close.  For some odd reason my IAC stays open at throttle and I checked my settings which shows it should be closed ya know abover a certain TPS % as well as rpm.  So odd, so I went ahead and plugged the IAC and started tuning without it.  Then somehow my serial cable started having connectivity issues.  Gonna order a different one.  But my fuel map is completely different with that fuel boost correct flatlined.

 

Post your current Cal file and ill have another look. The fuel table should and will look completly different with boost correction turned off, it should look like a normal fuel map, starting low and increasing through the rpm and load range until peak torque and then start tapering off slightly.

 

Are you using a USB serial converter? If so, look at picking your self up a cheap Dell D630, you can pick them up for under 100 bucks and they have a serial port so you dont need to use the usb, it will connect instantly and will rarlely give you connectivity issues.

Crazy3rdgen
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Last seen: 3 years 10 months ago
Joined: 08/01/2015 - 08:44
mdlimy wrote:

mdlimy wrote:

 

Crazy3rdgen wrote:

 

Alright so installed the v1.19 firmware to the ecu and installed the 1.19 factory map sensor map which was kinda close.  For some odd reason my IAC stays open at throttle and I checked my settings which shows it should be closed ya know abover a certain TPS % as well as rpm.  So odd, so I went ahead and plugged the IAC and started tuning without it.  Then somehow my serial cable started having connectivity issues.  Gonna order a different one.  But my fuel map is completely different with that fuel boost correct flatlined.

 

 

 

Post your current Cal file and ill have another look. The fuel table should and will look completly different with boost correction turned off, it should look like a normal fuel map, starting low and increasing through the rpm and load range until peak torque and then start tapering off slightly.

 

Are you using a USB serial converter? If so, look at picking your self up a cheap Dell D630, you can pick them up for under 100 bucks and they have a serial port so you dont need to use the usb, it will connect instantly and will rarlely give you connectivity issues.

 

Current CAL file -  http://www.filedropper.com/stockmaptunev1v119    havent tuned at all for boost yet just little putting around light loads.  Gotta new usb serial gonna give it a shot and see if I can get a good connection.