997.2 3.8 Engine Failure
#916
Rennlist Member
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TLDR for OP's story over 61 pages?
#917
Instructor
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It sounds like fuel injector issues can contribute to this problem. I read the LN TSB on injectors. I’m not a mechanic but I try to do as much as I can on my own.
Any good preventive practices for DFI 9A1’s with regard to the fuel injectors? Should they be tested? Replaced like a wear item? I’d love to hear from the experts on this...
It seems like this is beyond what would ever be covered in a PPI...
Any good preventive practices for DFI 9A1’s with regard to the fuel injectors? Should they be tested? Replaced like a wear item? I’d love to hear from the experts on this...
It seems like this is beyond what would ever be covered in a PPI...
#918
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It sounds like fuel injector issues can contribute to this problem. I read the LN TSB on injectors. I’m not a mechanic but I try to do as much as I can on my own.
Any good preventive practices for DFI 9A1’s with regard to the fuel injectors? Should they be tested? Replaced like a wear item? I’d love to hear from the experts on this...
It seems like this is beyond what would ever be covered in a PPI...
Any good preventive practices for DFI 9A1’s with regard to the fuel injectors? Should they be tested? Replaced like a wear item? I’d love to hear from the experts on this...
It seems like this is beyond what would ever be covered in a PPI...
#919
Instructor
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Charles? Jake? Anyone with professional experience in this area?
#920
Rennlist Member
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Driven Carb/Injector Defender, Seafoam, and LM Jectron. Those are the ones we use.
#921
Instructor
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Thanks, Charles. I didn’t know Driven made one. I’ve become a real fan of their products and trust their engine oil. That’s probably my top pick from experience with other Driven products.
#922
Nordschleife Master
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#924
Rennlist Member
The following 8 users liked this post by Optionman1:
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#925
Three Wheelin'
#926
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That would be fun to watch!
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TheTorch (06-10-2020)
#927
Racer
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Congrats! Jake's designated builder will be constructing a 3.8 stage II for my 987 CS in the coming months. Looking forward to your impressions.
Last edited by NAMR6MT; 06-10-2020 at 08:27 AM.
#928
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Can you please write down the conclusions in the summary (regarding 9A1)?
Of course I will (sometime) find time and read everything. Time is a valuable resource.
Thanks
#930
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Since this thread was revived after 3+ years I’ll provide a quick update on Bronz’s bore scored 09 4s. I’ve put 34k miles (odometer now at 114k) on the FSI 4.0 Stage II engine since acquiring it and it’s just a beast. Only mechanical issue was a year ago when one of the fuel injectors failed which led to misfires and the dreaded CEL. Replaced all 6 injectors and the car’s performance and mileage improved significantly and UOA fuel dilution numbers dropped.
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