Intermittent Misfire
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- OG (First 100 Outposters!)
- Posts: 391
- Joined: Sat Jan 27, 2018 10:22 am
- Location: Austin (Lago Vista) and the Desert
Re: Intermittent Misfire
UPDATE
Started having the P305 code again
I scanned with my durametric and now see P1371 Valve lift control check sum and P1364 valve lift control Cyl 5
any ideas on fixing?
If I drive it am I in danger of an engine failure?
Started having the P305 code again
I scanned with my durametric and now see P1371 Valve lift control check sum and P1364 valve lift control Cyl 5
any ideas on fixing?
If I drive it am I in danger of an engine failure?
2004 Boxster S 6 speed - DRL relay hack, Polaris AutoTop DIY (sold)
2004 996 Targa Tip
2020 BMW X3 Xdrive, 2004 F-150 "Big Red"
2004 996 Targa Tip
2020 BMW X3 Xdrive, 2004 F-150 "Big Red"
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- NG (Second 100 Outposters!)
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Re: Intermittent Misfire
You may have a bad lifter on that cylinder, they get stuck at high lift which causes misfires.
- 02TX996Cab
- NG (Second 100 Outposters!)
- Posts: 308
- Joined: Fri May 18, 2018 8:09 pm
- Location: North Central Texas
Re: Intermittent Misfire
A quick Google search on your new error codes returned the thread below from Rennlist (damnit):
https://rennlist.com/forums/996-forum/1 ... e-5-a.html
Sticking lifter seems to be a possibility, as theprf suggested above. Were I in your situation I'd drive the car to a shop you trust (sooner rather than later) who has a PIWIS where they can do some detailed diagnoses. If a lifter is indeed sticking it can be replaced with the engine still in the car or there's the shadetree mechanic routine described in the Rennlist (damnit) thread that's referenced from the one I've linked above.
Good luck!
https://rennlist.com/forums/996-forum/1 ... e-5-a.html
Sticking lifter seems to be a possibility, as theprf suggested above. Were I in your situation I'd drive the car to a shop you trust (sooner rather than later) who has a PIWIS where they can do some detailed diagnoses. If a lifter is indeed sticking it can be replaced with the engine still in the car or there's the shadetree mechanic routine described in the Rennlist (damnit) thread that's referenced from the one I've linked above.
Good luck!
Proud owner of a Flat6-powered 2002 996 Cab, 2016 GT4, 2019 Ford F-150 "Country Cadillac", and 2005 Ford Focus (not so hot hatch) daily driver. And a Wright ZTO 52" to keep several acres of grass-like substance neat and tidy!
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- OG (First 100 Outposters!)
- Posts: 391
- Joined: Sat Jan 27, 2018 10:22 am
- Location: Austin (Lago Vista) and the Desert
UPDATE-Re: Intermittent Misfire
My Targa ended up needing 2 intake lifters replaced. Could have been a lot worse
I found a really good shop that pretty much only does Porsche repair. Its been around over 30 years. They have 2 of their techs that really know M-96 engines. Even the office manager knows Porsche. Unlike many shops, they have real Porsche diagnostic tools, several versions of PIWIS. When I spoke with them and explained the codes and symptoms I was getting, they knew exactly what the likely problem was and they were spot on. I guess it helps when you really know the car
All in all it was just under $2k including an oil change and programming a new key for me. I think I got off easy.
I can't really complain, in the 8 years I have had the Targa, other than tires, oil and brakes, I have not had to really put any $$$ into the car. A few niggles here and there, maybe total $200 and a pair of window regulators that I installed.
Now I can start driver her again
I found a really good shop that pretty much only does Porsche repair. Its been around over 30 years. They have 2 of their techs that really know M-96 engines. Even the office manager knows Porsche. Unlike many shops, they have real Porsche diagnostic tools, several versions of PIWIS. When I spoke with them and explained the codes and symptoms I was getting, they knew exactly what the likely problem was and they were spot on. I guess it helps when you really know the car
All in all it was just under $2k including an oil change and programming a new key for me. I think I got off easy.
I can't really complain, in the 8 years I have had the Targa, other than tires, oil and brakes, I have not had to really put any $$$ into the car. A few niggles here and there, maybe total $200 and a pair of window regulators that I installed.
Now I can start driver her again
2004 Boxster S 6 speed - DRL relay hack, Polaris AutoTop DIY (sold)
2004 996 Targa Tip
2020 BMW X3 Xdrive, 2004 F-150 "Big Red"
2004 996 Targa Tip
2020 BMW X3 Xdrive, 2004 F-150 "Big Red"
- 32wildbilly
- Never gonna run around and desert you
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Re: UPDATE-Re: Intermittent Misfire
Yeah that isn't bad at all. Glad you got it straightened out.JayG wrote: ↑Thu Mar 23, 2023 9:59 am My Targa ended up needing 2 intake lifters replaced. Could have been a lot worse
I found a really good shop that pretty much only does Porsche repair. Its been around over 30 years. They have 2 of their techs that really know M-96 engines. Even the office manager knows Porsche. Unlike many shops, they have real Porsche diagnostic tools, several versions of PIWIS. When I spoke with them and explained the codes and symptoms I was getting, they knew exactly what the likely problem was and they were spot on. I guess it helps when you really know the car
All in all it was just under $2k including an oil change and programming a new key for me. I think I got off easy.
I can't really complain, in the 8 years I have had the Targa, other than tires, oil and brakes, I have not had to really put any $$$ into the car. A few niggles here and there, maybe total $200 and a pair of window regulators that I installed.
Now I can start driver her again
My misfire turned out to be much more expensive...
Never gonna make you cry...
- FRUNKenstein
- Curator Extraordinaire
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Re: UPDATE-Re: Intermittent Misfire
Johnny Irish spent that on an oil change.
www.kansascityautomuseum.com
Current:
2002 996TT X50, Guards Red
1987 928S4, Guards Red
1987 951, Guards Red
1973 914 2.0 Bahia Red
2006 955S, Lapis Blue
Other toys:
1988 BMW 325i Cabriolet, Alpin Weiss
1987 Bertone X1/9, Verde Chiaro
Gone but not forgotten: 1975 914 2.0, Laguna Blue; 1999 996 C4 Aerokit Black; 1990 964 C2 Guards Red; 2006 955S Arctic Silver
Current:
2002 996TT X50, Guards Red
1987 928S4, Guards Red
1987 951, Guards Red
1973 914 2.0 Bahia Red
2006 955S, Lapis Blue
Other toys:
1988 BMW 325i Cabriolet, Alpin Weiss
1987 Bertone X1/9, Verde Chiaro
Gone but not forgotten: 1975 914 2.0, Laguna Blue; 1999 996 C4 Aerokit Black; 1990 964 C2 Guards Red; 2006 955S Arctic Silver
Re: Intermittent Misfire
Well, an oil change and a pair of bespoke woolen driving socks made of thread hand-spun on the clam-chowder-white thighs of German virgins.
Understeer: You will hit the wall with the front end.
Oversteer: You will hit the wall with the rear end.
Horsepower: How hard you will hit the wall.
Torque: How far you will move the wall.
Gone hunting with Alec Baldwin and Dick Cheney. Back soon.
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- OG (First 100 Outposters!)
- Posts: 391
- Joined: Sat Jan 27, 2018 10:22 am
- Location: Austin (Lago Vista) and the Desert
Re: Intermittent Misfire
where can I get a pair of those socks
2004 Boxster S 6 speed - DRL relay hack, Polaris AutoTop DIY (sold)
2004 996 Targa Tip
2020 BMW X3 Xdrive, 2004 F-150 "Big Red"
2004 996 Targa Tip
2020 BMW X3 Xdrive, 2004 F-150 "Big Red"
Re: Intermittent Misfire
I believe you can email johnny.irish@imatwat.com
Understeer: You will hit the wall with the front end.
Oversteer: You will hit the wall with the rear end.
Horsepower: How hard you will hit the wall.
Torque: How far you will move the wall.
Gone hunting with Alec Baldwin and Dick Cheney. Back soon.
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- OG (First 100 Outposters!)
- Posts: 391
- Joined: Sat Jan 27, 2018 10:22 am
- Location: Austin (Lago Vista) and the Desert
Re: Intermittent Misfire
I thought it was johnny.irish@imaidiot.com
2004 Boxster S 6 speed - DRL relay hack, Polaris AutoTop DIY (sold)
2004 996 Targa Tip
2020 BMW X3 Xdrive, 2004 F-150 "Big Red"
2004 996 Targa Tip
2020 BMW X3 Xdrive, 2004 F-150 "Big Red"