Quote:
Use a 18mmx 1.5 thread nut for a bung
Spark plug non-fouler. 
- Erik
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| AFR Meter https://www.slantsix.org/forum/viewtopic.php?t=61863 |
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| Author: | Charrlie_S [ Wed Jan 31, 2018 7:02 am ] |
| Post subject: | Re: AFR Meter |
Got my UEGO, going on my truck, first. Had a thought, truck has all emission controls onboard and working. Will the air injection system effect the O2 readings? 88 D-150 360 4bbl. No computer, factory O2, or feedback carb. Does have Cat converter. |
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| Author: | Joshie225 [ Wed Jan 31, 2018 5:37 pm ] |
| Post subject: | Re: AFR Meter |
Quote: Will the air injection system effect the O2 readings?
Yes, absolutely.
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| Author: | emsvitil [ Wed Jan 31, 2018 6:53 pm ] |
| Post subject: | Re: AFR Meter |
Where is the air injected? If you're before the injection, it will work correctly (except at low rpm where you might get some backflow) Otherwise you need to cap it off (might get some air sucked thru if only belt removed) |
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| Author: | Charrlie_S [ Thu Feb 01, 2018 3:33 am ] |
| Post subject: | Re: AFR Meter |
Air is injected at the rear of the head. Kind of thought it would skew the AFR readings. Easy enough to remove the rubber hose at he pump and cap the tube, while I'm testing. Thanks |
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| Author: | Dart270 [ Thu Feb 01, 2018 5:03 am ] |
| Post subject: | Re: AFR Meter |
How do new cars do this then, with O2 sensor readings? I guess they have correction factors or something... Lou |
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| Author: | emsvitil [ Thu Feb 01, 2018 6:49 am ] |
| Post subject: | Re: AFR Meter |
Quote: How do new cars do this then, with O2 sensor readings? I guess they have correction factors or something...
Lou Air injected before O2 sensor would only be during open loop mode (usually just warm up to get cat hot quick) Then it would be injected after sensor during closed loop. They're also using electric pumps that are shut off when not needed. |
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| Author: | Dart270 [ Thu Feb 01, 2018 8:14 am ] |
| Post subject: | Re: AFR Meter |
Thanks, Ed. Lou |
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| Author: | Charrlie_S [ Thu Feb 01, 2018 11:15 am ] |
| Post subject: | Re: AFR Meter |
My 88 diplomat with a 318 lean burn, has a O2 sensor on the driver side exhaust manifold, right near the number 5 exhaust port. It also has the exact same air injection system, into the rear of the cyl head. I have removed the LB system, and use the O2 sensor to feed a narrow band gauge. After warm up, and light throttle cruise, the gauge goes so lean, it is off scale (whatever scale is). Just has LED bars of different colors. I think, the next chance I get, I will disable the AIR system, and see what if, any difference it makes in the readings. |
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| Author: | mpgFanatic [ Mon Jun 18, 2018 12:21 am ] |
| Post subject: | Re: AFR Meter |
Quote:
Use a 18mmx 1.5 thread nut for a bung
Spark plug non-fouler. - Erik |
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