Injector duty high

FlashPro questions & answers specific to the FN2 European Civic Type R
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civicRSA
Posts: 132
Joined: Thu Nov 12, 2009 11:29 am
Location: South Africa
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Injector duty high

Post by civicRSA » Thu Dec 03, 2009 11:15 am

Can someone please give me advice on why my injector duty is so high and also my AF seems high even with lots of fuel?

Attached calibration and data log.
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Data Logs chris 1.rar
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map chris 1.rar
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VitViper
Posts: 273
Joined: Thu Aug 27, 2009 10:38 pm

Post by VitViper » Thu Dec 03, 2009 1:45 pm

I just want to comment here since I've been helping him look at the tune.

He has a basically stock FN2 (injen CAI and cat delete) running an FD2 ECU.

If you look at the datalogs (for instance 3.fpdl), 2nd gear the a/f is sparatic and goes really rich. Third gear flat lines and is almost a straight line (in fact from a datalog he showed me last night, 3rd gear was supposedly at 14.0:1 a/f, but this datalog now shows 13.2), 4th gear goes even leaner.

Apparently he has already added 20% fuel to the map because the O2 was reading even leaner..

I'm suspecting there's either an exhaust leak (maybe?), faulty primary O2 sensor, or an injector sticking/clogged? But either way, a 93-94% injector duty cycle on a basically stock FN2 is not something I'd expect to see...

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