03-05-2011, 05:05 PM
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#1
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Registered User
Join Date: Dec 2006
Location: shoreham, ny
Posts: 1,619
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Mass air sensor - new
O2 sensors - new
Miss fires still happening - coil packs are next. About 250 for all four I think. Also do the spark plug tubes and o rings and spark plugs.
Just what I would do next. I know it all sux to do but after all is done you should have a reliable Porsche.
__________________
996 3.4 engine with 2.7 986 5speed transmission
Ebay Headers, Fabspeed high flow cats, JIC Cross, IPD Plenum, H&R Coilovers, B&M Short Shifter, AEM Uego Gauge Type Analog, Apexi S-AFC Select, 987 air box, Litronics, 2000 Tails and side markers, painted center console, 18" 987 S-Wheels, GT3 Front bumper with splitter.
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03-05-2011, 06:05 PM
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#2
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Registered User
Join Date: Jan 2009
Location: Tuscaloosa,AL
Posts: 30
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Coil packs.
Do you need to change the coil packs everytime you do a tuneup? Because I replaced mine prolly a year ago. Now for the park plugs yeah those prolly do need to be changed because last time I changed those I was changing the coil packs. Lol
Not 2 mention the O2 code is still on...
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03-05-2011, 06:31 PM
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#3
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Registered User
Join Date: Feb 2011
Location: socal
Posts: 5
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No you don't have to change the coil packs everytime you do a tuneup.
I only replace them when they go bad. I am not sure what their normal resistance is, but you can check them with a regular multimeter.
Did you clear the O2 code with a obd reader?
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03-05-2011, 06:36 PM
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#4
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Track rat
Join Date: Nov 2006
Location: Southern ID
Posts: 3,701
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Error codes first, clear diagnostic discussion second, change parts last.  This is by far the quickest and least expensive way to keep your car in good running condition. 
__________________
2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
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03-05-2011, 07:02 PM
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#5
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Registered User
Join Date: Jan 2009
Location: Tuscaloosa,AL
Posts: 30
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No I didn't clear the codes with the tool I just disconnected the Batt for 15 or so mins.
Topless you kindof confused me on you last post. I see why the codes would come first. But why replace the parts last and clear the codes 2nd? Wouldn't you get the codes, replace the parts, then clear the codes???
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03-05-2011, 07:43 PM
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#6
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Registered User
Join Date: Dec 2006
Location: shoreham, ny
Posts: 1,619
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skip it all and yank the motor! 3.4 time Just kidding. i'm sure you will figure it all out soon. It seems that you are narrowing it down. If you changed all that already I am not really sure what to check next. Good luck.
__________________
996 3.4 engine with 2.7 986 5speed transmission
Ebay Headers, Fabspeed high flow cats, JIC Cross, IPD Plenum, H&R Coilovers, B&M Short Shifter, AEM Uego Gauge Type Analog, Apexi S-AFC Select, 987 air box, Litronics, 2000 Tails and side markers, painted center console, 18" 987 S-Wheels, GT3 Front bumper with splitter.
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03-05-2011, 11:01 PM
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#7
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Registered User
Join Date: Jul 2010
Location: USA
Posts: 276
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I had Miss-fire codes and just replacing my spark plugs solved that issue.....cheap and worth a try.
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03-06-2011, 07:38 AM
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#8
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Track rat
Join Date: Nov 2006
Location: Southern ID
Posts: 3,701
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You still have not diagnosed your car. You could easily spend another $3k-$4K on parts and not fix the problem. Get all the error codes, year-mileage-model, part #s for all recent repairs and list any other recent mods/repairs. K&N oiled air filter? With this info we can help you.
__________________
2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
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Lil Red
2009 Porsche Cayman 2.9L
Hybrid Mode
