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996 40AE P0300 1-6 Code help
Hello Gents. I have been tracing a continuous PO300 fault code for a couple of months now... Backstory.... new car to me, PPI-Lite gave me the misfire codes but when I inspected the car, the coils were cracked so I assumed that was the cause. I replaced all the coils and plugs (correct part numbers) and within a few weeks the CEL light came back on.
I then purchased a Durmetric started trying to trace the codes... the misfires appear to happen during start-up and just off idle. I get an occasional stutter if I pull from a stop in first gear with revs below 1200rpms. I've run 3 cans of Seaform, cleaned the throtte body and MAF and everything is functioning (from what I can tell from the Actuals reports from the Durametric). I'm not pro and am just becoming acquainted with the 996 and I hate the idea of not being able to fix this without going to my independent. Could I ask someone with more experience reviewing the actuals to comment on the misfire patterns in the attached reports and let me know if they have any idea of what I should be checking next? The engine pulls strong and is smooth. The idle is pretty steady when cold (1100-1175rpm) drops down to 700-800rpm) when warmed up. Not oil burn, cross contamination in the coolant or oil tube. The cam variation looks on spec in the reports... I just don't know what to look at next. Thank you in advance... PS this is cross-posted on Renntech as well and have been getting lots of help there but I'm getting to a dead end. Hoped someone here might have a good idea.
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04 996 AE (daily driver) 08 A3 Quattro 05 E500 Wagon PO: 11 Raptor SCREW, 11 GTI 6sp mt, 01 Audi S4 Avanti, 95 Volvo 855 T5R, 82 911SC |
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This site doesn't allow me to upload files other than images so I created a public drop box where you can access the Fault Codes in PDF and the Actual Values in different text parameters across multiple date and start up conditions.
http://https://www.dropbox.com/sh/2ddt13qttiqr971/AACJFJkmnE0YM_Z6VEODnnGla?dl=0
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04 996 AE (daily driver) 08 A3 Quattro 05 E500 Wagon PO: 11 Raptor SCREW, 11 GTI 6sp mt, 01 Audi S4 Avanti, 95 Volvo 855 T5R, 82 911SC |
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http://www.dropbox.com/sh/2ddt13qttiqr971/AACJFJkmnE0YM_Z6VEODnnGla?dl=0
If the above does not work maybe this one will.
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04 996 AE (daily driver) 08 A3 Quattro 05 E500 Wagon PO: 11 Raptor SCREW, 11 GTI 6sp mt, 01 Audi S4 Avanti, 95 Volvo 855 T5R, 82 911SC |
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Registered
Join Date: Dec 2015
Location: Chicago area
Posts: 24
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Innov8, there is a member with the very same car having the same type of problem
https://rennlist.com/forums/996-forum/979446-nor-indy-or-dealership-could-fix-it-i-need-you-guys-help.html a lot of are suspecting it's in the ECU |
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| diremetic codes , misfires |