Wideband pegged rich in boost, and only in boost
11-05-2007, 06:56 PM
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Wideband pegged rich in boost, and only in boost
As I mentioned before, the LC-1 was a pain in the ass to install. So I gave up on it, and got an AEM UEGO. Fred and I put it in on Friday
The problem with the LC-1 that was driving us insane was that every time I hit boost, the sensor read full rich (pegged at 7.4afr). Well, we got the AEM in, and what do you know?! It frickin does the same thing. The AEM has a range from 10-18afr, and it's pegged at 10afr whenever it hits boost. This means that there was nothing wrong with the LC-1 in the first place!!!
So I have an extra wideband that I'm trying to sell!
Before anyone cries ground and power interference, we have new grounds and powers. We are stumped as to what would cause the sensor to read that rich (because it's not).
- dyno tuned at 11.8afr
- plugs look great
- the car runs like a raped ape
- there is no smoke spewing out the tailpipe
- I'm not throwing any codes.
- and I'm not about to go throw a new exhaust on there for ***** and giggles to see if that solves the problem
Any ideas as to what the hell would cause a wideband sensor to throw rich readings at me when there is nothing obvious wrong with the car?
The problem with the LC-1 that was driving us insane was that every time I hit boost, the sensor read full rich (pegged at 7.4afr). Well, we got the AEM in, and what do you know?! It frickin does the same thing. The AEM has a range from 10-18afr, and it's pegged at 10afr whenever it hits boost. This means that there was nothing wrong with the LC-1 in the first place!!!
So I have an extra wideband that I'm trying to sell!Before anyone cries ground and power interference, we have new grounds and powers. We are stumped as to what would cause the sensor to read that rich (because it's not).
- dyno tuned at 11.8afr
- plugs look great
- the car runs like a raped ape
- there is no smoke spewing out the tailpipe
- I'm not throwing any codes.
- and I'm not about to go throw a new exhaust on there for ***** and giggles to see if that solves the problem
Any ideas as to what the hell would cause a wideband sensor to throw rich readings at me when there is nothing obvious wrong with the car?
11-05-2007, 07:06 PM
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Very much so.
you must calibrate the wideband 02 in free air, that way it gets a pure reading (no exhaust gases present)
that way when exhaust gases are present it has something to judge against.
that is the case with my lc-1. i calibrate it monthly.
Oh sorry, the lc-1 calibration is a small push button.
Im sure theres online directions that show you what im talking about.
you must calibrate the wideband 02 in free air, that way it gets a pure reading (no exhaust gases present)
that way when exhaust gases are present it has something to judge against.
that is the case with my lc-1. i calibrate it monthly.
Oh sorry, the lc-1 calibration is a small push button.
Im sure theres online directions that show you what im talking about.
Last edited by shaunmcdee; 11-05-2007 at 07:06 PM. Reason: Automerged Doublepost
11-05-2007, 07:07 PM
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We questioned that, but aren't sure if the angle is the issue. We realize that it should be at the 10:00 position, and it's not (it's at the 9:00, parallel to the ground)...but don't think it would cause it to go full rich in boost only. Light throttle put put around town nets me a 14.7afr, like it should be.
11-05-2007, 07:15 PM
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Very much so.
you must calibrate the wideband 02 in free air, that way it gets a pure reading (no exhaust gases present)
that way when exhaust gases are present it has something to judge against.
that is the case with my lc-1. i calibrate it monthly.
Oh sorry, the lc-1 calibration is a small push button.
Im sure theres online directions that show you what im talking about.
you must calibrate the wideband 02 in free air, that way it gets a pure reading (no exhaust gases present)
that way when exhaust gases are present it has something to judge against.
that is the case with my lc-1. i calibrate it monthly.
Oh sorry, the lc-1 calibration is a small push button.
Im sure theres online directions that show you what im talking about.
11-05-2007, 09:05 PM
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for the aem uego to read correctly the sensor must be installed before the cat, which im assuming you did, and it must be installed inclined at least 10 degrees from horizontal with the electrical connection upwards. if not then it could possibly be collecting liquids in between the sensor housing and the senor element from the cold start phase.
therefore answering your question, since it is at the 9:00 position when you start your car fuel is probably getting caught in the sensor showing a rich reading
therefore answering your question, since it is at the 9:00 position when you start your car fuel is probably getting caught in the sensor showing a rich reading
Last edited by hondaeater_srt4; 11-05-2007 at 09:05 PM. Reason: Automerged Doublepost
11-05-2007, 09:35 PM
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for the aem uego to read correctly the sensor must be installed before the cat, which im assuming you did, and it must be installed inclined at least 10 degrees from horizontal with the electrical connection upwards. if not then it could possibly be collecting liquids in between the sensor housing and the senor element from the cold start phase.
therefore answering your question, since it is at the 9:00 position when you start your car fuel is probably getting caught in the sensor showing a rich reading
therefore answering your question, since it is at the 9:00 position when you start your car fuel is probably getting caught in the sensor showing a rich reading
You really think that is the root of the problem?
I had it for sale for awhile about 2 weeks ago. No one bought it, and I threatened to put it on eBay.
Wunsick has first dibs. I'll let you know if something comes up. $235 shipped.
Last edited by pjk91; 11-05-2007 at 09:35 PM. Reason: Automerged Doublepost
11-06-2007, 12:25 AM
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11-06-2007, 08:44 AM
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Well it doesnt sound like it would be that big of a deal but it could be it considering you have gone through 2 widebands w/ the same bung. I think it would be worth a thought...
11-06-2007, 09:01 AM
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First off do you have the wideband before or after your cat? It must be before the cat. Remember the dyno will show the A/F ratios after the cat if it's stuffed in the tailpipe, and that's not the most reliable way to pull A/F ratios. Also, did you use the setting for 4/6/8 cyl? Make sure it's on the 4 cyl one.
11-06-2007, 10:18 AM
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Thats way to far down, it needs be 18" away from the head, basically if you have a cat then after the flex pipe and before the cat at a 10* agle past the horizontal postition
11-06-2007, 01:14 PM
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No DIRECTLY after the flex pipe if you have a cat, w/o you can get in the ballpark but try to get it 18" away from the head
Here is a picture for you:
Here is a picture for you:
Last edited by Rangerondubz; 11-06-2007 at 01:14 PM. Reason: Automerged Doublepost