inaccurate AEM wideband
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From: Walton, NY
Car: 80 Camaro Z28
Engine: ~400hp Vortec 355ci
Transmission: T56 6-speed
Axle/Gears: 4.10 Moser 8.5" 10-bolt
inaccurate AEM wideband
I've been chasing my tail trying to tune my "91 Camaro GT" 3400/5spd (7730 $A1).
I bought a mail-order tune that was rich (BLMs in the low 100s at part throttle in CL), so I picked up a wideband to get it sorted out. It's an AEM wideband that reads almost exactly 12:1 at idle and usually the NBo2 reads around 450mv. With the BLMs active in CL, the WBo2 reads right at 14.7:1, but closed throttle in almost all conditions it reads very rich. WBo2 reads 12:1 at WOT with a commanded AFR of 12.7.
Lots and lots of research has helped me understand what I need to be doing (I think), but this post really makes me question the accuracy of my AEM wideband.
Has anyone else had similar problems with their AEM? I was planning on using the WBo2 to tune my carbed 80 Camaro once I was done with the 91, but if it it's not accurate at idle...what's the point right?
I bought a mail-order tune that was rich (BLMs in the low 100s at part throttle in CL), so I picked up a wideband to get it sorted out. It's an AEM wideband that reads almost exactly 12:1 at idle and usually the NBo2 reads around 450mv. With the BLMs active in CL, the WBo2 reads right at 14.7:1, but closed throttle in almost all conditions it reads very rich. WBo2 reads 12:1 at WOT with a commanded AFR of 12.7.
Lots and lots of research has helped me understand what I need to be doing (I think), but this post really makes me question the accuracy of my AEM wideband.
I'll probally open a whole new can of worms by saying this but I've had at least 3 different innovative widebands on dynojet dynos and they where all off. I trust my dynojet wideband because I get consistant results out of it from car to car. Prehaps someone else who has watched a innovative on the dyno will speak up w/ thier experiences.
The worst one I've see so far was a AEM. I don't know what the hell was wrong with it but the shorts/longs where on 0%, the dynojet wideband was 14.6-14.8, the nb sensors where switching nicely but the AEM read 12.0 a idle. Under load it cleared up and read along the lines of the dynojet wideband. It was mounted the downpipe of a turbo.
The worst one I've see so far was a AEM. I don't know what the hell was wrong with it but the shorts/longs where on 0%, the dynojet wideband was 14.6-14.8, the nb sensors where switching nicely but the AEM read 12.0 a idle. Under load it cleared up and read along the lines of the dynojet wideband. It was mounted the downpipe of a turbo.
Joined: Mar 2006
Posts: 4,370
Likes: 19
Car: 1973 Datsun 240Z/ 1985 S-15 Jimmy
Engine: Turbo LX9/To be decided
Transmission: 5-speed/T-5
Axle/Gears: R200 3.90/7.5" 3.73
Re: inaccurate AEM wideband
I haven't used an AEM, but have used 2 LC-1s (currently for sale actually), they seemed to work well. My only issue is that they have serial communication and it seems that every USB to serial converter I get fails at some point. If you plan on running the 5V analog input through the ECM, it's a good cable for that.
I have recently bought an SLC_DIY, from 14point7.com, and have to say that I'm very impressed with it. I haven't used it to it's potential, only because I'm not using it in a permanent installation. I'm using it because it has the built in display, and native USB. It can be bought in kit form (takes about 3 to 4 hours to assemble, or pre-assembled.
So if you're planning to switch from the AEM to something else, the WBO2 controllers I listed above I have used and work well.
I have read about similar complaints of the AEM on other forums.
I have recently bought an SLC_DIY, from 14point7.com, and have to say that I'm very impressed with it. I haven't used it to it's potential, only because I'm not using it in a permanent installation. I'm using it because it has the built in display, and native USB. It can be bought in kit form (takes about 3 to 4 hours to assemble, or pre-assembled.
So if you're planning to switch from the AEM to something else, the WBO2 controllers I listed above I have used and work well.
I have read about similar complaints of the AEM on other forums.
Thread Starter
Member
iTrader: (2)
Joined: Jul 2010
Posts: 123
Likes: 0
From: Walton, NY
Car: 80 Camaro Z28
Engine: ~400hp Vortec 355ci
Transmission: T56 6-speed
Axle/Gears: 4.10 Moser 8.5" 10-bolt
Re: inaccurate AEM wideband
PM sent, SixShooter.
Ideally I'd like to check my AEM gauge vs another sensor reporting to the datastream.
Ideally I'd like to check my AEM gauge vs another sensor reporting to the datastream.
Joined: Mar 2006
Posts: 4,370
Likes: 19
Car: 1973 Datsun 240Z/ 1985 S-15 Jimmy
Engine: Turbo LX9/To be decided
Transmission: 5-speed/T-5
Axle/Gears: R200 3.90/7.5" 3.73
Re: inaccurate AEM wideband
PM replied.
Yeah, I'll do that with certain things, like when checking voltages, I will sometimes, in critcal circuits use 2 DMMs as a sort of "sanity check", especially of something seems quite out of spec.
Yeah, I'll do that with certain things, like when checking voltages, I will sometimes, in critcal circuits use 2 DMMs as a sort of "sanity check", especially of something seems quite out of spec.
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