O wow, i didint relise this was you posting on the aem forums. i was just about to put the link from aem to here! LMAO

 

well this is interesting....i gots me a crank signal MIL light too, harness with resistor mod and no luck as well......

 

Have you notified Rustin?

 

no, how would i go about doing that?

 

Yes, but unfortunately I won't have time to test my theory before work today. It will have to wait until I get home later tonight. So, until I do, this is still just a theory but I love the logic of it.

BTW, in my FIC logs, the recorded battery voltage drops from 12v to 0v after a period of time that seems related to engine warm-up. I believe the FIC kept running off the netbook's 5V USB connection but didn't have enough voltage or current to operate properly at higher engine load demands. This might explain why the engine lost fuel and ignition under high load but could run okay for awhile under light load. This might also explain why my netbook battery only lasted half as long as usual.

Each time I tested without the PC connected to the FIC, the car would only run for a short time, then throw the P0335 and become completely undriveable. Presumably this was the point where the 12v supply was lost. If I bypassed the FIC without clearing the code, it ran fine. OBD Freezeframe data showed 0 rpm with the engine still running, albeit very poorly.

 

ScionFred = Frederick Pohl and neither is my real name. lol I've spent too much time on PC forums to trust giving out too much personal info on the www. Computer geeks aren't to be trusted if you have a disagreement.

BTW, thanks for the only reply I got on the incredibly helpful AEM forum.

 

Your theory seems sound. This would not be the first time I have seen something similar like this. Hopefully it works out. Yeah AEM forums aren't any help usually.

 

fred I was thinking that last night and then got your call I saw the one connector harness run a more dedicated line I'll shoot you a call in a few

 

any updates on this?

 

I've been really busy at work lately so I haven't had time to work on the car. Tommorrow I plan to find a good 12v ign switched pwr source for the FIC, test it and start tuning. Turbo install on wed. I'll post updates.

All I know for sure now is that the rev. 2 single ECU connector (B33) XB2 Boomslang harness does not and will not work. The rev. 1 dual connector (B33 & A36) harness seems to work but there is an open question of a 10k resistor on the O2 sensor tap. I was told that I had one but luckily I did not. There shouldn't be a resistor on the O2 circuit tap with a wideband O2.

 

Hey Cory, Boomslang told me that I had a 10k resistor on the O21+ tap. You had mentioned problems tuning your O2 map. If you have a resistor on the AFR/O2 nernst cell circuit tap, remove it. The only time you should need a resistor on the O2 circuit is with a narrow band O2 and even then it's a 1k resistor, not 10k.

I checked and I do not have any resistance on the B33-112/O21+ tap and my FIC O2 map works as it should.

 

soooooo....did everything get figured out?

 

Sort of... there are dozens of places to tap ignition switched +12v for the FIC from but the only suitable locations on the ECU harness are on A36, which Boomslang omitted with their rev 2 B33-only PnP harness. I'm looking at the fuse panels and oem wiring behind the glove box tommorrow. I'm trying to avoid cutting into the oem ecu harness but may end up tapping one of the several suitable +12v sources on A36.

 

ill keep my eye open on this i have the same problem

 

I think me and fred just figured it out he says he is gona try it tonight and let us know

 

I tried tapping FIC pwr directly from the battery and it is an improvement. I didn't get any codes wired this way. However, the engine still runs much better without the FIC. With the FIC installed, I'm still getting misfires and stumbling at idle and the ign timing jumps back and forth from 3* to 15* and points in between. With the FIC bypassed, timing is pretty steady at 15* and the idle is smooth. Also, for some reason the ECU is much slower to enter open loop with the FIC hooked up. All maps are set for zero change.

At least the FIC works now. The remaining issues may be resolved with different firmware, inj lag time or possibly changing resistance or removing the 2.2k resistors from the crk and/or cam inputs.

 

Haha bud you said the problem your self!

You set maf "map" to 0's! This is sending a 0 maf singal to the ecu!

Goto settings and change voltage to percent!

enjoy!

 

I wish it were that simple. My MAF map is set to "0" but it's in percent mode. I've checked and MAF in is always = to MAF out. .7v ign on, ~1.25V at idle and I haven't yet logged the max voltage but it's somewhere between 4-5V.

My O2 map is zeroed and also in percent mode although it doesn't matter since 0 volts in that map = zero change, not 0 volts.

I was born at night but it wasn't last night.

 

now try out a base map and see where that gets ya.

 

Not much point in that until I reinstall the turbo. I have a base map from Dezod but all it does is retard timing and richen the target AFR in the O2 map above 15PSIA.