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Title: Lean but injector duty cycle remains low Post by: vtraudt on March 22, 2018, 06:44:21 AM Actual AFR going lean with higher rpm while desired AFR is slowly decreasing.
Yet injector duty cycle remains low at 30% and not going up. See attached log. Why is ECU not increasing duty cycle to bring actual and desired AFR in line? B6 1.8T 550cc Bosch EV14, S4 MAF. 518AF ECU. Title: Re: Lean but injector duty cycle remains low Post by: jimmcgee5 on March 22, 2018, 08:04:25 AM blocked fuel filter or pump on its last legs .
Title: Re: Lean but injector duty cycle remains low Post by: vtraudt on March 22, 2018, 08:39:28 AM blocked fuel filter or pump on its last legs . If not enough fuel gets to the engine, why is ECU not 'trying' to compensate by cranking up the injector duty cycle? Title: Re: Lean but injector duty cycle remains low Post by: neuro on March 22, 2018, 11:41:14 AM Maybe you reach the 25% fuel adaptation limitation
search for min 0.75 max 1.25 value.. i don't remember the exact map name of those in def file. but that won't fix your problem. Title: Re: Lean but injector duty cycle remains low Post by: seany260 on March 22, 2018, 03:01:36 PM Whats the ECU and is KRKTE correct?
Title: Re: Lean but injector duty cycle remains low Post by: corradovolksb on March 22, 2018, 07:59:21 PM I agree with jimmcgee5 either a clogged fuel filter or pump issue.
Sent from my iPhone using Tapatalk Title: Re: Lean but injector duty cycle remains low Post by: vdubnation on March 23, 2018, 08:11:07 PM problems of a returnless fuel system
Title: Re: Lean but injector duty cycle remains low Post by: vwaudiguy on March 23, 2018, 09:02:15 PM This ecu has a wideband, and should be correcting at wot though?
Title: Re: Lean but injector duty cycle remains low Post by: jimmcgee5 on March 24, 2018, 04:06:13 AM we need to see logs .
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