Microtech Wideband out of calibration?
#1
24 yrs driving 2nd Gen RX
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Wideband out of calibration?
I'm new to using a wideband, and just installed an LC-1 in my 88 TII with LTX12s ECU.
Setting up idle has been a challenge, and I've read a ton of threads on the issue. One concern is that many of you have stated that you can't idle a Microtech driven engine leaner than 12.5 or so.
Mine is idling pretty smoothat 1000rpm, 20"Hg and 14.1. Would you think that my LC-1 might need recalibration? If I enrich the mixture to 12.5, it still idles, but lopes like it's too rich. When I lean it back out to 14+, it runs very smooth.
I did follow installation/cal instructions to the letter although there has been a bit of time between installation and finally getting the engine to run.
Thoughts?
- kel -
Setting up idle has been a challenge, and I've read a ton of threads on the issue. One concern is that many of you have stated that you can't idle a Microtech driven engine leaner than 12.5 or so.
Mine is idling pretty smoothat 1000rpm, 20"Hg and 14.1. Would you think that my LC-1 might need recalibration? If I enrich the mixture to 12.5, it still idles, but lopes like it's too rich. When I lean it back out to 14+, it runs very smooth.
I did follow installation/cal instructions to the letter although there has been a bit of time between installation and finally getting the engine to run.
Thoughts?
- kel -
#2
24 yrs driving 2nd Gen RX
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ANYone?
am I the only one who can idle a street port at 20" 1000RPM and 14:1?
I'd be thrilled to just have a good engine, but I suspect otherwise.
Anyway, the weekend plan is to take the O2 sensor out and do a fresh free-air calibration, then see what it reads afterward - no changes to the maps.
Update will follow (just for the record)
- k -
am I the only one who can idle a street port at 20" 1000RPM and 14:1?
I'd be thrilled to just have a good engine, but I suspect otherwise.
Anyway, the weekend plan is to take the O2 sensor out and do a fresh free-air calibration, then see what it reads afterward - no changes to the maps.
Update will follow (just for the record)
- k -
#3
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Not sure where you're getting that info about not idling leaner than 12.5:1. I'd never even attempt to tune an idle that rich. My bridgeported car idles at about 14:1 as well.
#5
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I searched on more than one occasion for various Microtech tuning topics. I got my impression here:
https://www.rx7club.com/showthread.p...light=idle+afr
Starting at post #9, and then 12, 18, 19, 30, 31
Then this thread: https://www.rx7club.com/showthread.p...light=idle+afr
Post #8
And: https://www.rx7club.com/showthread.p...light=idle+afr
Post #25
and: https://www.rx7club.com/showthread.p...light=idle+afr
Posts 2, 6 & 7
and: https://www.rx7club.com/showthread.p...light=idle+afr
Posts 5, 7 & 14
and: https://www.rx7club.com/showthread.p...dle+afr&page=2
Post 38, 39 & 44
and: https://www.rx7club.com/showthread.p...light=idle+afr
Post 2
and: https://www.rx7club.com/showthread.p...light=idle+afr
Post 7
and: https://www.rx7club.com/showthread.p...light=idle+afr
Posts 7, 9, 10 & 11
In review, I do see that many mention AFR at 13:1, but often that's described as too lean, so I thought that at 14+ something must be up.
BTW, just bought the book you recommended in one of the discussions I was reading "Performance Fuel Injection Systems". Thanks for the recommendation, am reading it now.
- kel -
.
https://www.rx7club.com/showthread.p...light=idle+afr
Starting at post #9, and then 12, 18, 19, 30, 31
Then this thread: https://www.rx7club.com/showthread.p...light=idle+afr
Post #8
And: https://www.rx7club.com/showthread.p...light=idle+afr
Post #25
and: https://www.rx7club.com/showthread.p...light=idle+afr
Posts 2, 6 & 7
and: https://www.rx7club.com/showthread.p...light=idle+afr
Posts 5, 7 & 14
and: https://www.rx7club.com/showthread.p...dle+afr&page=2
Post 38, 39 & 44
and: https://www.rx7club.com/showthread.p...light=idle+afr
Post 2
and: https://www.rx7club.com/showthread.p...light=idle+afr
Post 7
and: https://www.rx7club.com/showthread.p...light=idle+afr
Posts 7, 9, 10 & 11
In review, I do see that many mention AFR at 13:1, but often that's described as too lean, so I thought that at 14+ something must be up.
BTW, just bought the book you recommended in one of the discussions I was reading "Performance Fuel Injection Systems". Thanks for the recommendation, am reading it now.
- kel -
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