wideband/ecu

[93redcb7]

i dont think so, but i dont think ill get CEL for the o2 heater because im just going to leave my old o2 hooked up since i have 2 o2 bung.

also if i have it on 1v i couldnt use lambda? there has to be a way to bypass only using 1v

[jhondayaaj]

Then there must be a way to adjust on your Crome and leave it on P0. I believe that also reads in afr and lambda.

[93redcb7]

yea i left it on p0 before and it started running funny, but i was kinda tired and forgot to disable the o2 heater, and reset ecu and what not so ill try again tomorrow morning

[jhondayaaj]

Kool. Good luck and report back. Sorry I wasn't much of help. I'm sure someone on here should be more of help by knowing more about Crome.

[93redcb7]

ok so i finally got around to doing it yesterday, turns out you have to warm up the car with a stock narrowband(or the 1v setting on wideband) once warmed up you change it to p1 for lambda and your ready to go, i used pin d14 for wideband and i also leave the stock narrowband for DD it just has quick disconnects.

[jhondayaaj]

That's good to hear.

With a chipped ecu, street tune, 17 degrees advanced, 52 psi fuel pressure with hose off, no stock O2, my afr is at 14.3-15.1 cruise, then at v tec range full throttle, it's at around 12.8 I believe. Haven't really payed too much attention beçause I hardly drive it hard.

Is yours on a street tune now?

[93redcb7]

yes i am street tuning it, im around 15 on cruise any after 1/2 throttle start giving it a little more till WOT is around 13-12

[98vtec]

just FYI,

D14 cannot see a full 0-5v range which the wideband uses. It can only see up to 3.88 volts so you have to scale your wideband voltage in crome to attempt to match the 5v signal going to the gauge. It will never be perfect.

crome is not setup to run a wideband off D10 which is a 0-5v circuit. And even if it was, you have to remove two resistors for it to read accurately.

I want to say you can use the EGR circuit but there are some things that need to be changed on the ecu IIRC. the EGR circuit is 5v.

Are you using an ostrich or demon?

[93redcb7]

just FYI,

D14 cannot see a full 0-5v range which the wideband uses. It can only see up to 3.88 volts so you have to scale your wideband voltage in crome to attempt to match the 5v signal going to the gauge. It will never be perfect.

crome is not setup to run a wideband off D10 which is a 0-5v circuit. And even if it was, you have to remove two resistors for it to read accurately.

I want to say you can use the EGR circuit but there are some things that need to be changed on the ecu IIRC. the EGR circuit is 5v.

Are you using an ostrich or demon?

ostrich and you can use d14 in crome with the aem wideband on p1, it reads perfect.

[98vtec]

ostrich and you can use d14 in crome with the aem wideband on p1, it reads perfect.

ok.

[93redcb7]

ok.

you have to warm it up with regular o2 sensor(or p5 or 6, cant remember its rotated all the way to the right) then go into crome and disable o2 and hook up wideband, and go to tuner logging and choose the aem wideband

[Stoner51]

I think what Blake is trying to say is that the stock D14 ecu input only reads 0-3.89v, The AEM wideband goes from 0-5v. So you are loosing some on the volts.

I used D10 and removed the 2 resistors.


steve

[93redcb7]

I think what Blake is trying to say is that the stock D14 ecu input only reads 0-3.89v, The AEM wideband goes from 0-5v. So you are loosing some on the volts.

I used D10 and removed the 2 resistors.


steve

yes, but it has it scaled to only read 1-3v i believe. but even if not it reads betweeen 12-15 which is where all my afr's will be anyways.

[GhostAccord]

Yes 0v - 3.38v is more than enough range from a wideband to work. If the wideband controller puts out anything over 3.38v. The ECU will cap it to 3.38v therefore the datalog or gauge will stick at 3.38v aka 16.80 (17) AFR. If it sticks at that voltage while using unleaded gasoline. You are running a wee bit lean and should adjust your fuel/timing until you see the voltage start to drop.

Scaling the voltage output from 0-5v down to 0-3v is also a workable solution. Just remember that the narrower the voltage range the lower the tuning resolution will be.

[Stoner51]

I knew it would work. My only concern is since the normal operating range is 0-5 and you have it scaled from 0-3. The changes you make will be greater. Which is essentially what Ghost said.

But I'm curious. Did you set just the AFR or do you still have a fuel map? That may sound really stupid, but I am trying to tune. I have set up the AFR based on load and temp and what not. and it seems to be staying around the normal AFR. I am wondering If I still need to adjust the fuel number some. If I set the AFR to run 14.7 Running closed loop.

Not trying to thread jack. I just can't seem to find an answer.

I'm still learning.