[JayRolla]

Originally Posted by gamefreakgc

Doesn't timing automatically advance if you cool the intake charge and richen the fuel mixture anyway? I've always been under the assumption the vehicle always runs at maximum timing and retards it when you get spark knock. I might be wrong though?

I've watched my timing and my 4Runner retards timing significantly under boost. I'll hit 25* cruising and when I step on it it'll drop down as low as 12* so I know there's lots of power to be gained there.

Yes that is how it works. Usually the drop is when boost hits, it should slow advance during WOT to a higher level. 12* is low and maybe some more could be used at higher rpms. Thats not bad for when boost starts to build.

[MTD]

Originally Posted by dhalsey

Awesome. Well done.

It's coming along hopefully I will get further tonight, but my new 3DP did come today, so we will see :P

[dhalsey]

Does the aem fic take away all the adaptation of the ecu? Does the aem fic make any on the fly adaptations? What if I tuned at 1000ft of elevation, would the tune still work if I make a trek into the mountains at 7000?

[MTD]

Originally Posted by dhalsey

Does the aem fic take away all the adaptation of the ecu? Does the aem fic make any on the fly adaptations? What if I tuned at 1000ft of elevation, would the tune still work if I make a trek into the mountains at 7000?

Nope, just as the URD it is a MAP based tuning piggyback so it won't inhibit the ECU's ability to function at all. It won't adapt to a climb in elevation, but the stock ECU doesn't either in some respects. Basically all the FIC does is scale the fuel by a certain % and as the stock ECU corrects itself at elevation the scaling stays the same, but it would be scaling an already scaled number.

I could be wrong, but that is how my roommate explained it to me and he had heard it from his IC engines professor. Sorry for the game of telephone, I will check tonight to make sure that, that is correct, but it seems right.

[s20004runner]

awesome thread!

For the 99-00 v6 auto (federal model) (one cat and narrowband).

Is it same as the 98 model - type c?

[MTD]

Originally Posted by s20004runner

awesome thread!

For the 99-00 v6 auto (federal model) (one cat and narrowband).

Is it same as the 98 model - type c?

I am confused buy your question I guess. Are you talking about the wiring harness about the O2 type?

99' is still narrow band if it is federal. 00' is wideband if it isn't a manual.

[JayRolla]

Originally Posted by MTD

Nope, just as the URD it is a MAP based tuning piggyback so it won't inhibit the ECU's ability to function at all. It won't adapt to a climb in elevation, but the stock ECU doesn't either in some respects. Basically all the FIC does is scale the fuel by a certain % and as the stock ECU corrects itself at elevation the scaling stays the same, but it would be scaling an already scaled number.

I could be wrong, but that is how my roommate explained it to me and he had heard it from his IC engines professor. Sorry for the game of telephone, I will check tonight to make sure that, that is correct, but it seems right.

Your pretty much right. Issue happens when fuel trim maxes out and ecu cant adjust anymore, which can happen since maf is tricking ecu. I have tuned in elevation and it can be a battle. But never such an issue that its going to hurt the motor. You always tune safe on street car so even in worst case situation you dont run lean or have too much timing.

THIS WEBSITE EXPLAINS PIGGY BACK ISSUES PRETTY WELL

Fried Rice BANZAI: Tuning: Piggy Back Tuning Issues, MAF vs. Fuel Map

Everything he says is true, I have experienced all the issues he talks about tuning piggy backs. But the bang for the buck is usually well worth it. Also the ease of stock fuel maps is always good for beginners for tuning. Always go piggyback if your new to the tuning game.

[MTD]

Originally Posted by JayRolla

Your pretty much right. Issue happens when fuel trim maxes out and ecu cant adjust anymore, which can happen since maf is tricking ecu. I have tuned in elevation and it can be a battle. But never such an issue that its going to hurt the motor. You always tune safe on street car so even in worst case situation you dont run lean or have too much timing.

THIS WEBSITE EXPLAINS PIGGY BACK ISSUES PRETTY WELL

Fried Rice BANZAI: Tuning: Piggy Back Tuning Issues, MAF vs. Fuel Map

Everything he says is true, I have experienced all the issues he talks about tuning piggy backs. But the bang for the buck is usually well worth it. Also the ease of stock fuel maps is always good for beginners for tuning. Always go piggyback if your new to the tuning game.

I have read pretty much all of his articles, and they are very well written and worth the read. I will have to include the links to his articles in the reference section. I will have to read this one, I have seen the fuel trims hit their max while tuning and I could see that being a problem for sure. The only Issue I could see would be dropping in elevation after tuning at elevation though. As you dropped down in elevation you would get increasingly leaner.

One thing you could do is have a street tune and then have a 'safe' tune and run the F/IC's tune switching function, I may still set mine up that way.

[s20004runner]

Originally Posted by MTD

I am confused buy your question I guess. Are you talking about the wiring harness about the O2 type?

99' is still narrow band if it is federal. 00' is wideband if it isn't a manual.

Yep I was asking about the wiring harness. For 00, I think you are right.

I know my 99 v6 auto (non cali, one cat, O2 upstream and 02 downstream) is narrowband, so it must be type c wiring harness?

[MTD]

Originally Posted by s20004runner

Yep I was asking about the wiring harness. For 00, I think you are right.

I know my 99 v6 auto (non cali, one cat, O2 upstream and 02 downstream) is narrowband, so it must be type c wiring harness?

Type D, take a look at the diagram again. If you are still unsure you can look behind the glovebox.

Type C- 4 plugs
Type D- 5 plugs (may not all be populated)

[steezemcqueen]

Watching this. The Split Second unit i'm running works but definitely has its limitations. I think upgrading that would be the next step for me.

[JayRolla]

Originally Posted by steezemcqueen

Watching this. The Split Second unit i'm running works but definitely has its limitations. I think upgrading that would be the next step for me.

Along with e85, more fuel and boost!!!

[MTD]

Did a bit more today, may revise how I am handling the steps with snippets straight from the install manual. That way there is no confusing on what types of sensors to wire and how.

[maverickhawk]

This is Fun!

[0xfded]

Subbed. If / when I start ratcheting up the boost on mine, this is the route I'm interested in going. Thanks for doing this!