Well, just like the topic says.. I'm wondering if the ecu compensates for different IAT temps and adds more fuel when it's cooler. Just wondering if it's necessary to retune in the winter/summer, etc.. I'm referring to when the ecu goes into open loop, I know it adjusts for closed loop. Thanks.
-Mike
Does the Honda ECU adjust fuel open loop according to iat?
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- Posts: 351
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I'm not guessing. I am recalling it from memory. It was a topic that was once discussed.
If you really want to be sure, I suggest that you buy a wideband O2 sensor and datalogger and start using it. winter is coming and you can check if your car is leaning out.
Don't buy those cheapo A/F meters. Buy the real ones like MOTEC or FJO.
You can never be too sure if you don't do it yourself.
If you really want to be sure, I suggest that you buy a wideband O2 sensor and datalogger and start using it. winter is coming and you can check if your car is leaning out.
Don't buy those cheapo A/F meters. Buy the real ones like MOTEC or FJO.
You can never be too sure if you don't do it yourself.
Air temp compensation
The ECU compensates for temperature. The only things that the ECU does not compensate for is fuel temperature and humidity.
Hondata
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Re: Air temp compensation
I've asked this before, but never got a response...can you explain *how* the ECU compensates for temperature? Does it just adjust fuel, or does it adjust timing as well?Hondata wrote:The ECU compensates for temperature. The only things that the ECU does not compensate for is fuel temperature and humidity.
I'm particularly interested in how the ECU behaves at extremely high IAT readings (150+ deg. F).
-Andy
'99 EBP Si
S200 w/everything|12psi JRSC|Heatshield
AEM CAI|Kamikaze headers
Custom (quiet) 2.5" exhaust
Quaife LSD|JUN 9lb flywheel|ACT XTSS clutch
Eibach Pro-Kit/KYB AGX
Full polyurethane bushings/mounts
OZ 16x7 Superleggera + Sumi HTR Z II
S200 w/everything|12psi JRSC|Heatshield
AEM CAI|Kamikaze headers
Custom (quiet) 2.5" exhaust
Quaife LSD|JUN 9lb flywheel|ACT XTSS clutch
Eibach Pro-Kit/KYB AGX
Full polyurethane bushings/mounts
OZ 16x7 Superleggera + Sumi HTR Z II