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  #16  
Old April 17th, 2018, 11:14
RCP Phx RCP Phx is offline
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Re: stroker issues- wideband reads somewhat lean but exhaust is super rich

On your data logger, is the temp in Celsius? Does your AFR meter require a "free air" calibration before starting a test, mine does?
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  #17  
Old April 17th, 2018, 11:19
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stroker issues- wideband reads somewhat lean but exhaust is super rich




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As soon as I crest the top i'ma turn driver and floor it!

1998 4.6 stroker , aw4 XJ on 60/14b , 5.38s, grizzly/detroit, cage, 40s, psc big bore box , assist, 3 link,transgo aw4 reprogram
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  #18  
Old April 17th, 2018, 11:21
RCP Phx RCP Phx is offline
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Re: stroker issues- wideband reads somewhat lean but exhaust is super rich

I forgot to say that I added a "test" port bung in my exhaust, it's just slightly upstream of upstream sensor.
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  #19  
Old April 17th, 2018, 11:22
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Re: stroker issues- wideband reads somewhat lean but exhaust is super rich

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Originally Posted by RCP Phx View Post
On your data logger, is the temp in Celsius? Does your AFR meter require a "free air" calibration before starting a test, mine does?
Those are both great questions... I need to find out. I dont know how to calibrate the wideband.

I just talked to a tech buddy at a dealership and he said that the other tech misinterpreted the 13.4% on the sniffer at my other buddies shop. he said the 13.4% co2 is just fine to slightly rich at best. not horribly rich. so maybe the wideband is slightly off, but even then tail pipe readings might differ from a downpipes wideband by a little so maybe not.
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As soon as I crest the top i'ma turn driver and floor it!

1998 4.6 stroker , aw4 XJ on 60/14b , 5.38s, grizzly/detroit, cage, 40s, psc big bore box , assist, 3 link,transgo aw4 reprogram
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  #20  
Old April 17th, 2018, 11:22
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Re: stroker issues- wideband reads somewhat lean but exhaust is super rich

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Originally Posted by RCP Phx View Post
I forgot to say that I added a "test" port bung in my exhaust, it's just slightly upstream of upstream sensor.
yeah I welded up my own 3" exhaust and added a wideband bung just above my regular o2 sensor
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As soon as I crest the top i'ma turn driver and floor it!

1998 4.6 stroker , aw4 XJ on 60/14b , 5.38s, grizzly/detroit, cage, 40s, psc big bore box , assist, 3 link,transgo aw4 reprogram
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  #21  
Old April 17th, 2018, 11:23
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stroker issues- wideband reads somewhat lean but exhaust is super rich




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As soon as I crest the top i'ma turn driver and floor it!

1998 4.6 stroker , aw4 XJ on 60/14b , 5.38s, grizzly/detroit, cage, 40s, psc big bore box , assist, 3 link,transgo aw4 reprogram
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  #22  
Old April 17th, 2018, 11:24
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Re: stroker issues- wideband reads somewhat lean but exhaust is super rich

So maybe its not as far off as we think at this point. Ugh. Its like im chasing my tail.
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As soon as I crest the top i'ma turn driver and floor it!

1998 4.6 stroker , aw4 XJ on 60/14b , 5.38s, grizzly/detroit, cage, 40s, psc big bore box , assist, 3 link,transgo aw4 reprogram
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  #23  
Old April 17th, 2018, 11:43
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Re: stroker issues- wideband reads somewhat lean but exhaust is super rich

What does your wideband read at idle and low load cruise? Should be ~14.7.

I don't understand how oil would be getting into your gas as you mentioned. Do you mean that gas is getting into your oil?
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  #24  
Old April 17th, 2018, 12:29
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Re: stroker issues- wideband reads somewhat lean but exhaust is super rich

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Originally Posted by Boostwerks.com View Post
What does your wideband read at idle and low load cruise? Should be ~14.7.

I don't understand how oil would be getting into your gas as you mentioned. Do you mean that gas is getting into your oil?
Sorry I havent been sleeping enough - yes that is what I meant. Not a ton of gas in the oil though. Could be from Break in.
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As soon as I crest the top i'ma turn driver and floor it!

1998 4.6 stroker , aw4 XJ on 60/14b , 5.38s, grizzly/detroit, cage, 40s, psc big bore box , assist, 3 link,transgo aw4 reprogram
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  #25  
Old April 17th, 2018, 12:35
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Re: stroker issues- wideband reads somewhat lean but exhaust is super rich

SO it seems like the tech misinterpreted CO2 for CO, so when my buddy said hey my friend has 13% CO he meant to say 13% CO2 to his master tech at his shop, when his tech heard 13% CO he freaked out...

SO I think this thing is running ok finally. It runs decent.

The issue I am so stressed about overfueling is that we had to pull the motor recently after a year of driving (900 miles only) the machine noticed a ton of fuel in the oil and said it was just starting to take out the rings. SO with the motor back in I am extra paranoid about running too rich, but this seems about right.
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As soon as I crest the top i'ma turn driver and floor it!

1998 4.6 stroker , aw4 XJ on 60/14b , 5.38s, grizzly/detroit, cage, 40s, psc big bore box , assist, 3 link,transgo aw4 reprogram
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  #26  
Old April 17th, 2018, 15:18
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Re: stroker issues- wideband reads somewhat lean but exhaust is super rich

With the amount of money you have in it, I'd HIGHLY recommend getting it tuned on a dyno. Since you have the late model ECU, tuning is entirely possible. Flyin Ryan is the man. I just wish I knew that he was out there when I had the turbo.
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  #27  
Old April 17th, 2018, 15:41
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Re: stroker issues- wideband reads somewhat lean but exhaust is super rich

yeah he is tuning it right now via email. I could go find a dyno somewhere I suppose and data log that way.
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As soon as I crest the top i'ma turn driver and floor it!

1998 4.6 stroker , aw4 XJ on 60/14b , 5.38s, grizzly/detroit, cage, 40s, psc big bore box , assist, 3 link,transgo aw4 reprogram
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  #28  
Old April 18th, 2018, 10:28
RCP Phx RCP Phx is offline
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Re: stroker issues- wideband reads somewhat lean but exhaust is super rich

Let's hope you see improvement. Your data log is a little hard to read but I don't like "what I think" I see. I didn't do any ECU tuning with mine but rather looked at the numbers and made a SWAG decision on some injectors. The final results were almost outstanding!
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