quattrotr
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« on: June 28, 2012, 12:08:16 PM »
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Attached are ORG & TUN file that came with my car S3 1.8t APY engine. I fitted AEM wideband and boost gauge. What I saw is that on upper RPM levels AFR begins to get lean and boost drobs. Such as: AFR is at 12.5-13 at 3000-3500rpm and goes higher to 16 at 6500rpm. Boost gets peak to 1.45 bar and then drops to 0.85-0.9 bar at 6000rpm.
Will decreasing lambda map in upper rpm's be enough to get more fuel on this narrow band lambda? What else do I have to change?
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TheDSI
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« Reply #1 on: June 28, 2012, 12:45:10 PM »
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maybe you have a bad MAF sensor .
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quattrotr
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« Reply #2 on: June 28, 2012, 01:08:37 PM »
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What should be a good MAF read in rev limiter area? As far as I know arround 200 gr/s is OK, right? I will log the MAF and check it...
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littco
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« Reply #3 on: June 28, 2012, 02:01:19 PM »
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Is your fpr working ok? Vac leak maybe. That'll cause the car to lean out.
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nyet
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« Reply #4 on: June 28, 2012, 02:15:40 PM »
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also pressure test.
Make sure you don't have a post maf intake leak.
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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littco
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« Reply #5 on: June 28, 2012, 02:17:46 PM »
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Is your fpr working ok? Vac leak maybe. That'll cause the car to lean out. here's your lambda map as well, it's stock and really should have been changed..
I just had a look over the map and all the "tuner" has done is raise the last 3 rows of kmirl a bit and put in a very high LDRXN for a K04 anyway... That is it. 2 maps changed. |
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« Last Edit: June 28, 2012, 02:26:43 PM by littco »
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quattrotr
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« Reply #6 on: June 28, 2012, 03:18:27 PM »
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I will check FPR and DV too. 1.4-1.5 bar are boost levels that K04-020 series can handle I guess. Will decreasing LAMFA map for 100% TP decrease the lean level? How much should I decrease it as %?
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RS-MAD
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« Reply #7 on: June 28, 2012, 03:42:07 PM »
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Check your fuel pump , too comon problem on these cars ...
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pedrosousa
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« Reply #8 on: June 29, 2012, 03:51:45 AM »
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I will check FPR and DV too. 1.4-1.5 bar are boost levels that K04-020 series can handle I guess. Will decreasing LAMFA map for 100% TP decrease the lean level? How much should I decrease it as %?
Don't use %, you should use the value that you want in lambda, if you want 0.85, use this value, LAMFA map speaking |
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@lq!
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« Reply #9 on: June 29, 2012, 04:35:48 AM »
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I will check FPR and DV too. 1.4-1.5 bar are boost levels that K04-020 series can handle I guess. Will decreasing LAMFA map for 100% TP decrease the lean level? How much should I decrease it as %?
i had a same issue.. the problem could be fuel pump. |
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quattrotr
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« Reply #10 on: June 29, 2012, 11:18:31 AM »
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Thank you guys I will check all these stuff and decrease LAMFA too and observe the AFR pattern.
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ibizacupra
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« Reply #11 on: July 01, 2012, 07:28:36 AM »
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Thank you guys I will check all these stuff and decrease LAMFA too and observe the AFR pattern.
see what block 001 lambda adjust is doing vs your 031 request vs actual lambda - if you see big swings it may indicate weak fuel pump |
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TheDSI
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« Reply #12 on: July 01, 2012, 10:34:30 AM »
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narrow band lambda ECU's don't have requested vs acutal lambda .
do a log of boost pressure vs vs MAF reading and post it here .
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ibizacupra
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« Reply #13 on: August 01, 2012, 08:02:06 AM »
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narrow band lambda ECU's don't have requested vs acutal lambda .
do a log of boost pressure vs vs MAF reading and post it here .
teach me to skim read the post wont it.. my bad - doh! (well aware of narrow band limitations) |
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