ECU Pin Swaps

[4piknup]

I know there is settings for the tps. 300ohms at idle or something. But I think there is really 2 points that need to be correct.
1. Ecu must know that it should be idling. This sets the fuel cut on decel and also makes the ecu move timing around to stabilise idle.
2. You dont want your foot flat and the ecu thinking its at 85% throttle. Fairly obvious.

I say to set the tps, go full throttle (engine off and key on) and adjust the tps to be just reading 100%. Foot off and check the idle switch is on, and switches off very close to just opening throttle.
probably the idle switch is more important than 100%....if the ecu sees 100% throttle before accel is all the way down its not that bad.
This may be why your decel is harsh, if the idle switch comes on too early.

 

[3VOLUTIONIST]

All the same o2 sensors. They all output the same voltage at stoichio.

Later on in that link I sent you is a video on how a isc should work at key on and off. Maybe pull yours and see what it does. You might not have to change your wiring, I dont know. You dont say you have any idle issues.

I pulled my ISC off and did that about 6 months ago, it went in and out correctly at the time, and with the old ECU the idle didn't have any issues, nor have I noticed any with the new ECU (yet)

this maybe a earth offset?
If you earth for the o2 sensor is not perfect, the voltage the ecu sees is offset making the ecu trim fuel.
Also maybe the volt supply isnt quite perfect, that will offset the output the other way. Sort of like a voltage divider.
I cant think what way the offset might be in order for it to be adding fuel.

I'll see where the earth wire ends up and what condition the earth is in. And do you mean the voltage supply from the o2 sensor? (faulty sensor)

 

[4piknup]

The sensor may be fine, but you may have a bad connection with the 5v supply voltage, the signal return to the ecu or the earth.

hang on. Thats baloney^
There is no 5v supply, just the signal and earth. (Plus 2 wires for the heater

 

[3VOLUTIONIST]

The five volt supply to the ecu you mean? I'll have a look

 

[4piknup]

Had to edit that garbag and the post on other page.
there is no 5v supply on o2 sensors. I think they run on dark elixer or something.

 

[3VOLUTIONIST]

Its a chemical reaction that generates a voltage

 

[3VOLUTIONIST]

ok, adjusted the TPS, reads 98.8 at WOT and 12.2 when the car is idling (was reading 0)

 

[3VOLUTIONIST]

I know there is settings for the tps. 300ohms at idle or something. But I think there is really 2 points that need to be correct.
1. Ecu must know that it should be idling. This sets the fuel cut on decel and also makes the ecu move timing around to stabilise idle.
2. You dont want your foot flat and the ecu thinking its at 85% throttle. Fairly obvious.

I say to set the tps, go full throttle (engine off and key on) and adjust the tps to be just reading 100%. Foot off and check the idle switch is on, and switches off very close to just opening throttle.
probably the idle switch is more important than 100%....if the ecu sees 100% throttle before accel is all the way down its not that bad.
This may be why your decel is harsh, if the idle switch comes on too early.

this may sound stupid, but how do you know if the idle swtich is on or not? I can see the datalogging option under the Openport 1.3 cable using the MUTIII setting, however using my OP2.0 and the OBDII96+ setting, I cant log idle switch.
Can I not use the OP2.0 to log things like knocksum?? I thought the 1.3 cable was just an OBDII to USB cable

Have also disabled closed loop for now by editing the ECUPeriphery option. idling at 15AFR

just checked the isc, all coils have 30 ohms, so thats fine

 

[4piknup]

I dont know how to do it in evoscan.
you could multimeter it I suppose.
Ecmlink has a option to log it.

 

[3VOLUTIONIST]

I dont know how to do it in evoscan.
you could multimeter it I suppose.
Ecmlink has a option to log it.

i think ecmlink is a lot like the evscan 1.3 datalogging cable, there are a lot more logging parameters than what i can do with the 2.0 (for the evo 7 ecu), looks like ill need to get a 1.3 cable

 

[4piknup]

I have one. I think geo has one also.
I thought you needed a 1.3 for ecuflash.
or maybe its just the license for more capabilities and the 1.3 has the license but the 2.0 doesnt.
its all on the evoscan site anyway.

 

[4piknup]

http://www.evolutionm.net/forums/ecuflash/465942-idle-position-switch-off-evoscan-big-problem-2.html

this guy has issues too. But they resolved them. Notice he says engine was very aggressive. Not many of the posts are correct to my knowledge, but it shows the idle switch logging

 

[3VOLUTIONIST]

I have one. I think geo has one also.
I thought you needed a 1.3 for ecuflash.
or maybe its just the license for more capabilities and the 1.3 has the license but the 2.0 doesnt.
its all on the evoscan site anyway.

I've got an openport 2.0 because that was the one I needed to rear/flash an evo 6 ECU, however with the 7/8/9's you can read and flash with the 1.3. The only difference it seems is that the 2.0 allows me to log to the SD card, which is handy (once i figure it out), and the extra logging parameters on the 1.3 cable (eg. knocksum). Oh, and you cant get access to the 'actuators' menu if you use the OP2.0.

The license thing on the evoscan website confused the hell out of me, theres three different 1.3 cables, and he says "this cable is cheaper because it doesnt include the cost to use ECUFlash", but ECUFlash is free... so I'm not sure what he's on about there.

 

[4piknup]

Yea it did me too.
1.3d has no reflash abilities.
1.3r will only reflash with evoscan (I assume this is limited)
1.3u is a 1.3r with the $40 ecuflash license.


but. The 2.0 comes with a $40 ecuflash license, so you should have this already. You should be able to just get the 1.3r ???

 

[4piknup]

But.
They say the 1.3u cable has a serial to recognise the ecuflash program...
I dont know. Maybe contact them

 

[3VOLUTIONIST]

Well I downloaded ecuflash for free on the Tactrix website, it never asked me for a code or anything. I'll have to ask Hamish (evoscan) about it, he never responded to my last to ticket :/

The other thing that's confusing me is that Evoscan never shows any more than 100 load, even if I do a WOT on ramp pull in third gear, it'll log fine, but doesnt show any load cells being used above 100. I thought 100 load was the equivalent of 0 pounds of boost? So I should be expecting to see 200-250 load cells being used right? (running ~19psi out of a TD04)

 

[3VOLUTIONIST]

Righteo, the car's up and running again with the new turbo and 2.5" stainless front pipe

Running 15 pounds at the moment, keeps blowing hoses off so I'm remedying that. I think the Evo 6 787 MAF that I got is f*cked however as it's throwing a barometric pressure sensor CEL (P0105) :/ So I might have to swap to a 399 (evo 7 MAF). And it's also giving me a P0120 CEL, "Throttle position sensor circuit malfunction"
It's noticeably laggier than the TD04, more laggy than I was expecting it to be, it doesnt reach 15psi until about 4500rpm in third gear, theres less torque down low, but definitely more top end.

That being said, it's definitely not running correctly, sometimes the car jolts and then "stalls". the engine loses power, and the throttle does nothing, then it'll randomly come back to life and drive fine.. So I'm not sure what the hells up with that.

Here's an evoscan log, just some idling, engine warmed up, with a little bit of revving.

 

[khubner1]

Ok first sort your cel issues bad baro press will throw the afm readings off chrck to ensure that the barrow press signal blue wire is in the right place

Check your tps

The boost issue pribably leeding off early electronic boost control is best option

 

[3VOLUTIONIST]

I've got a GM 3 port BCS, so all I need now is the GM MAP sensor, and I can run the onboard boost control.

I've printed off the wiring diagrams for the Evo VI and 1.8 Colt MAF sensors, going to check my wiring at the plug, then at the ECU.

Welded a bead on my last intercooler pipe, should solve the issue of them blowing off.

Still can't figure out the TPS problem though, its been adjusted and now reads 98.8 when your foots flat to the floor (apparently its common not to get exactly 100).

 

[Dave_GSR1.8]

Re "Still can't figure out the TPS problem though, its been adjusted and now reads 98.8"

Sorry, can't help much here other than to observe that with a different ECU (ecmlink v3 lite) you can calibrate the TPS to read 0 to 100% in the ECU with full throttle deflection; so I'm wondering if there is a similar function with your config (which sounds as good as ECM Link).