Go Back   6speedonline.com Forums > Porsche (Present) > 997
Sign in using an external account
Register Forgot Password?

997 Current model of the 911 C2, C2S, C4, C4S, GTS, Targa and Cabriolet Discussion.
Sponsored By HRE Wheels

Hesitation with cold motor

Reply
 
 
 
 
Thread Tools Search this Thread Rate Thread Display Modes
  #1  
Old 09-12-2012, 06:54 PM
Registered User
2005 Porsche 911
 
Join Date: Sep 2012
Posts: 49
Rep Power: 3
luigi007 is on a distinguished road
Hesitation with cold motor

Can someone tell me why my 2005 997 hesitates during take off while the engine is cold. Keeps doing that until engine oil warms up yo around 200. Changed the spark plugs since car has 63K miles. Need to clean body throttle? Please help.
Reply With Quote
  #2  
Old 09-12-2012, 07:05 PM
krysFly's Avatar
Registered User
2006 Porsche 911
 
Join Date: Apr 2011
Location: Toronto
Posts: 431
Rep Power: 35
krysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant future
I had a similar issue. I changed the plugs and a faulty coil, it solved the problem. if you changed the plugs I would check the ignition coils next.
__________________
2006 997S (1995 993 - gone)
2006 Ferrari 360 Spider
2010 BMW X5d
2008 Toyota Tundra Supercharged

Last edited by krysFly; 09-12-2012 at 07:08 PM.
Reply With Quote
  #3  
Old 09-12-2012, 07:51 PM
Registered User
2005 Porsche 911
 
Join Date: Sep 2012
Posts: 49
Rep Power: 3
luigi007 is on a distinguished road
Did you change all the 6 coils or found the faulty one?
Reply With Quote
  #4  
Old 09-12-2012, 08:49 PM
krysFly's Avatar
Registered User
2006 Porsche 911
 
Join Date: Apr 2011
Location: Toronto
Posts: 431
Rep Power: 35
krysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant future
I changed just one, it was cracked.
__________________
2006 997S (1995 993 - gone)
2006 Ferrari 360 Spider
2010 BMW X5d
2008 Toyota Tundra Supercharged
Reply With Quote
  #5  
Old 09-13-2012, 06:25 AM
Registered User
2005 Porsche 911
 
Join Date: Sep 2012
Posts: 49
Rep Power: 3
luigi007 is on a distinguished road
Thanks. I need to check mines. Are the crack easy to identify? Cracks on plastic housing? How much to replace?
Reply With Quote
  #6  
Old 09-13-2012, 06:58 AM
krysFly's Avatar
Registered User
2006 Porsche 911
 
Join Date: Apr 2011
Location: Toronto
Posts: 431
Rep Power: 35
krysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant futurekrysFly has a brilliant future
yes, fairly easy to spot. They are about $50 a piece (ballpark) I should have replaced them all last year. The coils are a know issue.
__________________
2006 997S (1995 993 - gone)
2006 Ferrari 360 Spider
2010 BMW X5d
2008 Toyota Tundra Supercharged
Reply With Quote
  #7  
Old 09-13-2012, 07:46 AM
Registered User
2005 Porsche 911
 
Join Date: Sep 2012
Posts: 49
Rep Power: 3
luigi007 is on a distinguished road
Thanks krysFly for your help. Great forum!
Reply With Quote
  #8  
Old 09-14-2012, 04:00 PM
Registered User
2005 Porsche 911
 
Join Date: Sep 2012
Posts: 49
Rep Power: 3
luigi007 is on a distinguished road
Guys, still having hesitation problem. New spark plugs and coils looked ok. What else should I check? Is this normal when engine is cold?
Reply With Quote
  #9  
Old 09-14-2012, 06:06 PM
Steve997S's Avatar
Registered User
2009 Porsche 911
 
Join Date: Mar 2011
Location: San Antonio
Posts: 492
Rep Power: 37
Steve997S has much to be proud ofSteve997S has much to be proud ofSteve997S has much to be proud ofSteve997S has much to be proud ofSteve997S has much to be proud ofSteve997S has much to be proud ofSteve997S has much to be proud ofSteve997S has much to be proud ofSteve997S has much to be proud ofSteve997S has much to be proud of
Quote:
Originally Posted by luigi007 View Post
Can someone tell me why my 2005 997 hesitates during take off while the engine is cold. Keeps doing that until engine oil warms up yo around 200. Changed the spark plugs since car has 63K miles. Need to clean body throttle? Please help.
Is this a serious question? j/k When you say hesitates, do you mean a significant off idle stumble when cold, or just a noticeable power difference under acceleration? Are you overloading the engine when cold? Cars are engineered to run properly at operating temperature. No cold engine runs as well as when the engine is operating in the designed temperature range. Lots of factors could be related to poor performance. Stop guessing and take it to someone who can determine an issue if there is one.
__________________
Nurburgring Veteran (2004 ~ 2009)!
Current tools:
2009 Carrera S, white, PDK, Sport Design steering wheel, Cargraphic exhaust & X-pipe
2007 MV Agusta F4 1000 R red/silver, race ECU & Arrow RG3 pipes
2013 Cervelo S5 roadie Ultegra; 2010 Cervelo R3 SL roadie SRAM Red; 2009 Cervelo P3 tri-bike Dura-Ace
Reply With Quote
  #10  
Old 09-14-2012, 11:44 PM
denversteve's Avatar
Registered User
Garage is empty, add now
 
Join Date: Jun 2008
Location: Colorado / L.A.
Posts: 1,678
Rep Power: 91
denversteve has a brilliant futuredenversteve has a brilliant futuredenversteve has a brilliant futuredenversteve has a brilliant futuredenversteve has a brilliant futuredenversteve has a brilliant futuredenversteve has a brilliant futuredenversteve has a brilliant futuredenversteve has a brilliant futuredenversteve has a brilliant futuredenversteve has a brilliant future
Quote:
Originally Posted by luigi007 View Post
Guys, still having hesitation problem. New spark plugs and coils looked ok. What else should I check? Is this normal when engine is cold?
No. This is not normal. My cars always run the same whether cold or warmed up. The difference is I never push the car too hard until it's properly warmed up.
__________________
996 Cabrio., 6-Speed, Black/Tan, Hard top, EuroCupGT Twin Intake, etc....
955 Cayenne S - Jarama Beige, Tiptronic, Nokian Hakkapeliitta 7 tires.

Last edited by denversteve; 09-15-2012 at 01:05 PM.
Reply With Quote
  #11  
Old 09-15-2012, 09:10 AM
Dadio's Avatar
Registered User
Garage is empty, add now
 
Join Date: Jun 2008
Location: USA
Posts: 1,277
Rep Power: 89
Dadio has a reputation beyond reputeDadio has a reputation beyond reputeDadio has a reputation beyond reputeDadio has a reputation beyond reputeDadio has a reputation beyond reputeDadio has a reputation beyond reputeDadio has a reputation beyond reputeDadio has a reputation beyond reputeDadio has a reputation beyond reputeDadio has a reputation beyond reputeDadio has a reputation beyond repute
Quote:
Originally Posted by luigi007 View Post
Can someone tell me why my 2005 997 hesitates during take off while the engine is cold. Keeps doing that until engine oil warms up yo around 200. Changed the spark plugs since car has 63K miles. Need to clean body throttle? Please help.
Would suggest you clean the throttle body and MAF sensor if it has never been done. CRC makes a seperate spray on solution for both. Auto Zone has 'em. Just did mine after noticing build up inside throttle body. If it's there it's on your MAF.
Reply With Quote
  #12  
Old 09-15-2012, 09:22 AM
Registered User
2005 Porsche 911
 
Join Date: Sep 2012
Posts: 49
Rep Power: 3
luigi007 is on a distinguished road
Thanks danversteve and dadio. I never push my car when cold. That is a given. Also, cleaning the MAF was my next item to check. It seems that it is a very common item to do. Is cleaning the body throttle also very common? What should be the frequency on both MAF and body throttle?
Reply With Quote
  #13  
Old 09-15-2012, 12:09 PM
Dadio's Avatar
Registered User
Garage is empty, add now
 
Join Date: Jun 2008
Location: USA
Posts: 1,277
Rep Power: 89
Dadio has a reputation beyond reputeDadio has a reputation beyond reputeDadio has a reputation beyond reputeDadio has a reputation beyond reputeDadio has a reputation beyond reputeDadio has a reputation beyond reputeDadio has a reputation beyond reputeDadio has a reputation beyond reputeDadio has a reputation beyond reputeDadio has a reputation beyond reputeDadio has a reputation beyond repute
Quote:
Originally Posted by luigi007 View Post
Thanks danversteve and dadio. I never push my car when cold. That is a given. Also, cleaning the MAF was my next item to check. It seems that it is a very common item to do. Is cleaning the body throttle also very common? What should be the frequency on both MAF and body throttle?
I have a BMC filter in my car which may have contributed to the greasy stuff coating the throttle body near and on both sides of the butterfly. I'd check it for any build up at least at each filter change and make your decision based on what you find. Interior surfaces should be clean and shiny, if not, it's needs cleaning. Best method is to remove it from the engine to clean it as cleaner is not plastic or paint friendly.
Reply With Quote
  #14  
Old 09-15-2012, 01:07 PM
denversteve's Avatar
Registered User
Garage is empty, add now
 
Join Date: Jun 2008
Location: Colorado / L.A.
Posts: 1,678
Rep Power: 91
denversteve has a brilliant futuredenversteve has a brilliant futuredenversteve has a brilliant futuredenversteve has a brilliant futuredenversteve has a brilliant futuredenversteve has a brilliant futuredenversteve has a brilliant futuredenversteve has a brilliant futuredenversteve has a brilliant futuredenversteve has a brilliant futuredenversteve has a brilliant future
Quote:
Originally Posted by luigi007 View Post
It seems that it is a very common item to do. Is cleaning the body throttle also very common? What should be the frequency on both MAF and body throttle?
I've never had to do it after three Porsches. Before taking anything off and cleaning it without a known need, I would run a bottle of SeaFoam through the system and see if that helps. It usually cleans things needed cleaning pretty well.
__________________
996 Cabrio., 6-Speed, Black/Tan, Hard top, EuroCupGT Twin Intake, etc....
955 Cayenne S - Jarama Beige, Tiptronic, Nokian Hakkapeliitta 7 tires.
Reply With Quote
  #15  
Old 09-15-2012, 01:37 PM
Steve997S's Avatar
Registered User
2009 Porsche 911
 
Join Date: Mar 2011
Location: San Antonio
Posts: 492
Rep Power: 37
Steve997S has much to be proud ofSteve997S has much to be proud ofSteve997S has much to be proud ofSteve997S has much to be proud ofSteve997S has much to be proud ofSteve997S has much to be proud ofSteve997S has much to be proud ofSteve997S has much to be proud ofSteve997S has much to be proud ofSteve997S has much to be proud of
Quote:
Originally Posted by denversteve View Post
I've never had to do it after three Porsches. Before taking anything off and cleaning it without a known need, I would run a bottle of SeaFoam through the system and see if that helps. It usually cleans things needed cleaning pretty well.
Agree with this no-touch approach. But since I don't think it will be heeded, my only suggestion is make sure you explore and clean during the week so you can run to the dealer and get new parts when you break something. Seriously, physically messing with the MAF is a disaster waiting to happen. OP really needs to better define what seems to be the issue when cold, anything from noises to power irregularities. I'm assuming everything runs normal when warm. That in itself has me thinking there probably isn't an issue. With that, I think I'm done.
__________________
Nurburgring Veteran (2004 ~ 2009)!
Current tools:
2009 Carrera S, white, PDK, Sport Design steering wheel, Cargraphic exhaust & X-pipe
2007 MV Agusta F4 1000 R red/silver, race ECU & Arrow RG3 pipes
2013 Cervelo S5 roadie Ultegra; 2010 Cervelo R3 SL roadie SRAM Red; 2009 Cervelo P3 tri-bike Dura-Ace
Reply With Quote
Old 09-15-2012, 01:37 PM
Reply
 
 
 

Tags
2006, 996, 996tt, 997, bentley, cold, gt, hesitates, hesitation, motor, porsche, seafoam, sidekick, sport, turbo


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Join 6SpeedOnline
Visit our Sponsors

All times are GMT -6. The time now is 01:05 AM.


Secure Backup

SEO by vBSEO 3.5.2