No O2 correction ????????

[tonydee64]

I agree with you Norbs... I'm going to go out in the garage and see if mine makes a correction right after warm up... And I'm going to data log the whole thing to document it.

 

[norbs]

ill be online tonight so you can email them and i will study them. I am putting together a wbo2 information page from what i find on the web. Hope it can help me and others as well!

 

[norbs]

The findings are that wit the 02 in the dp about 8" from the turbo the exhaust temps are about 350-400 cooler than the factory o2 location. At cruise i am getting about 600 degrees there so i dont think its a heat issue, for the sensor going dead intermittent. Drove the car 15 minutes no problems tonight. If your racing and the o2 goes goofy i am going to set the max o2 correction over 17 psi to maybe -6% only and even less at higher boost, only way to save the motor in case of a screw up

 

[tonydee64]

Norbs,

I just ran a data log but tonight but my O2 correction was basically dead from the beginning... I pulled all of my wires and and checked them with an Ohm meter and could not find any shorts or bad connections. I pulled my ECU and O2 sensor and am sending them back to FAST. At this point I just don't trust it as is... I was taking a good look at my O2 sensor tonight and it does have a slight dent in the outer cover (that part that covers the heating element). I remember it coming that way from FAST. I knew the WB O2 sensor was very fragile and VERY expensive so I've always treated it like gold. This could get nasty....!!!

 

[nightdiver]

dashboard

Got a few Qs
What are :
delta map
delta tps
atm corr(%)
grs corr(%)
op mode
code
diag A
diag B
I know what all the rest are. There is no comment about these in the help section
Thanks

 

[tonydee64]

Re: dashboard

Originally posted by nightdiver
Got a few Qs
What are :
delta map
delta tps
atm corr(%)
grs corr(%)
op mode
code
diag A
diag B
I know what all the rest are. There is no comment about these in the help section
Thanks

I can help you on a few of them, maybe Norbs knows the rest.

diag A & B are for diagnostic/security purposes according to FAST.

atm corr% is the amount of fuel addedsubtracted given the air temp.

code it is usually 132

grs corr% is the amount of correction of all "adders" such as battery correction, ats, coolant, afterstart, etc. Basically the total of any non-VE table adjustment related to fuel.

I don't know about the delta stuff.

 

[norbs]

I don't know the rest of the sensors either, i should have worked for fast maybe. Anyway i have designed a "shielded" WB o2 harness, hopefully this will put an end to the weird dead sensor output. Drove it today was fine so far. But i suggest you keep the sensor wiring away from sparkplug cables and sources of high current, due to induced voltages.

 

[tonydee64]

I sent my unit and O2 sensor back to FAST. We'll just have to see what happens.

 

[tonydee64]

Alright guys,

I got my ECU back from FAST and they said nothing was wrong with it. Right after I sent the box back to FAST I noticed that my POS battery cable was not fully tightened. I also fixed what I thought at least were very minor exhaust leaks. Low and behold the O2 sensor works like a champ.. BUT!!!!!!!!!!! I was still having black smoke pouring from the exhaust everytime I would blip the throttle.. It didn't matter if I put the ECU in Open or Closed status. I was analyzing my last data log of the evening and saw that everytime I blipped the throttle the A/F would go VERY rich... The light finally went on... I simply changed the AE MAP decay from 96 to 128 and the smoke was magically gone... Now, it's time to do some serious on the road tuning!!!!!

Might not be a bad time to check your cables!!!!

Tony

 

[norbs]

I guess i was wrong, but how could i have figured that out?

 

[tonydee64]

Yep, that's just the thing.. it's just darn near impossible to diagnose these things unless you are there. I took m car around the block last night for the very first time. I still have some tuning to do but I am sneaking up on it slowly... Thanks again Norbs for all you help!

Tony

 

[nightdiver]

How many sensors do you monitor usually ?
I noticed from the first week( 5 years ago) that when i monitor all 14 sensors there is a delay........could this be the problem and make the ecm stuck like the pcs do some times ?

 

[tonydee64]

I've never though of that, but I'll try it as I usually do monitor 14 sensors... some of which I don't necessarily need.. Thanks for the tip!

 

[norbs]

Tony, any progress on the fat idle still?

 

[nightdiver]

Its getting worse

I dont trust the ecm to do the job.
I got afr readings but no correction again .As a matter of fact i logged it once.
O2 correction was 0% and it started doing the correction after i let it off...engine hot 195* and intake temp was 75*

The lamda symbol is right there all the time and afr between shifts went up to 13.94 with 23+ psi and 26* of advance
Ok that sounds scary but i run a LOT of pure meth (Julio inside) with two 15 injectors. Thats why my engine is still in one piece

Do i need a new WB sensor ? Ive got readings but no correction

 

[Razor]

Is there a way you can disable the correction once the maps have been done?

I did a couple dyno pulls yesterday, my first was lean at over 13:1 AFR. The second was 12.0 and the HP picked up 8 rwhp and the EGT's dropped from 1620 down to 1475.

Made 512 RWHP at 24 PSI peak boost.

That alcohol covers up a lot of mistakes..

Julio

 

[nightdiver]

Originally posted by Razor


Made 512 RWHP at 24 PSI peak boost.

That alcohol covers up a lot of mistakes..

Julio

Tell me about it.
It stucked at -25 % last week and i had to pull over(backfire) and turn it off . I started 2 secs later and it worked like new

I think i might go dfi Gen 7 some time later

 

[Razor]

Thats just wrong. It has to be something simple..connector, ground, etc.. when electronics go bad its always constant. Intermittants are almost always due to bad connections.

If its a heat/thermal issue.. that should be replicable pretty easy as well. Maybe its EMI/RFI type noise getting into the wires?

I base my opinion on having worked on consumer electronics for the past 21 years, and 150,000 products personally repaired.

HTH

Julio