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Title: Changing MAF reading from tapered to straight Post by: kenrevo on June 25, 2014, 08:38:58 AM I bought a 2001 Audi S4 that the owner started going stage 3 but ran into problems and decided to sell it. One of the problems is that the tune is an EPL tune for K04's, Ev14 52lb, 4 bar fuel pump, and a 85mm tapered MAF. The MAF on the car is a 034 open air element with a 85mm MAF which, I assume, is causing problems with my AFR creating my misfires. My AFR goes to ~7 on the high RPM.
I've looked for an EPL MAF housing to get the right one but no one is selling them separately. I was wondering if it would be easy, relatively speaking, to just adjust the tune from a tapered to a straight MAF housing or should I just start from scratch? Eventually I plan on getting the car tuned but want to get intercoolers and downpipes before I spend lots of money on a tune. I don't have a wideband sensor but can take logs or post the ones just let me know. Thanks Title: Re: Changing MAF reading from tapered to straight Post by: tjwasiak on June 25, 2014, 08:48:51 AM I would start from scratch and tune it properly for hardware you are using.
Title: Re: Changing MAF reading from tapered to straight Post by: nyet on June 25, 2014, 10:26:19 AM You will not be able to edit the EPL tune.
Title: Re: Changing MAF reading from tapered to straight Post by: phila_dot on June 25, 2014, 11:07:16 AM You might want to figure out why target lambda is 0.5.
The MAF housing has no direct connection to target lambda. Title: Re: Changing MAF reading from tapered to straight Post by: kenrevo on June 25, 2014, 12:07:12 PM You might want to figure out why target lambda is 0.5. The MAF housing has no direct connection to target lambda. I was told that since the MAF housing was wrong for the tune, what will cause my AFR to be off causing my misfire. I attached my csv files if you want to look. Title: Re: Changing MAF reading from tapered to straight Post by: ddillenger on June 25, 2014, 12:11:05 PM How did you get an EPL tune without their fueling kit?
I don't want to make accusations, but it seems as though you're trying to do something untoward. Title: Re: Changing MAF reading from tapered to straight Post by: nyet on June 25, 2014, 12:29:36 PM Target lambda is not .5
I'm seeing: EGT sensor activity (bad EGT, or you have very high egts) EGT enrich to .7 Also, your O2 voltages look really really bad. Title: Re: Changing MAF reading from tapered to straight Post by: kenrevo on June 25, 2014, 12:33:48 PM How did you get an EPL tune without their fueling kit? I don't want to make accusations, but it seems as though you're trying to do something untoward. It's what came with the car, as I said the car was pieced together [badly]. Also the logs are in second gear, I don't have a good place to do 3rd gear pulls. |