Injector duty high

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

Injector duty high

Post by civicRSA »

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.
Data Logs chris 1.rar
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map chris 1.rar
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Posts: 273
Joined: Thu Aug 27, 2009 10:38 pm

Post by VitViper »

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...