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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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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