Notices
996 Forum 1999-2005
Sponsored by:

Weak Sounding Intial Engine Start Up

Thread Tools
 
Search this Thread
 
Old 08-08-2007, 01:53 AM
  #1  
SpeedPhreak
Intermediate
Thread Starter
 
SpeedPhreak's Avatar
 
Join Date: Aug 2006
Location: Milwaukee / Chicago
Posts: 28
Received 0 Likes on 0 Posts
Default Weak Sounding Intial Engine Start Up

Anyone ever run into a situation where engine start up is weak sounding from a cold start? Once warmed up, subsequent starts sound fine. Wondering if there's a bad sensor somewhere?

Previously had dealer check similar situation out under warranty and they replaced the Bank 1 Catalyst (996-113-031-06). Not having any check engine light or other noticeable mechanical impact.

Old 08-08-2007, 01:59 AM
  #2  
ArneeA
Drifting
 
ArneeA's Avatar
 
Join Date: Jan 2007
Location: 91x15
Posts: 3,422
Likes: 0
Received 1 Like on 1 Post
Default

I think that part number is for the catalytic converter. I looked at Pelican Parts. I have a weak sounding engine startup at cold also. No CEL or any sort of broken mechanical sounds. I wonder if I need new cats???

My car only has 18k miles
Old 08-08-2007, 02:02 AM
  #3  
CosmosC4S
Three Wheelin'
 
CosmosC4S's Avatar
 
Join Date: Jul 2006
Location: NEast Florida
Posts: 1,521
Likes: 0
Received 0 Likes on 0 Posts
Default

Sounds like another "Clean the Throttle Body" issue...
Could be simple as that.
I had similar issues, and just had that resolved.
Old 08-08-2007, 02:08 AM
  #4  
SpeedPhreak
Intermediate
Thread Starter
 
SpeedPhreak's Avatar
 
Join Date: Aug 2006
Location: Milwaukee / Chicago
Posts: 28
Received 0 Likes on 0 Posts
Default

Yup. That's the part number for the catalytic converter, but I think the dealership was pre-emptively replacing it rather than having determined that it was defective. Not sure that we need to replace this.

__________________
SpeedPhreak

02 C2 - K&N Aircharger, SSK, Tubi Headers and Exhaust
Old 08-08-2007, 02:09 AM
  #5  
SpeedPhreak
Intermediate
Thread Starter
 
SpeedPhreak's Avatar
 
Join Date: Aug 2006
Location: Milwaukee / Chicago
Posts: 28
Received 0 Likes on 0 Posts
Default

How do you "Clean the Throttle Body" on a 996?

__________________
SpeedPhreak

02 C2 - K&N Aircharger, SSK, Tubi Headers and Exhaust
Old 08-08-2007, 02:12 AM
  #6  
CosmosC4S
Three Wheelin'
 
CosmosC4S's Avatar
 
Join Date: Jul 2006
Location: NEast Florida
Posts: 1,521
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by SpeedPhreak
How do you "Clean the Throttle Body" on a 996?
You could do a search for it on the site,
or I have a DIY writeup: LINK HERE

It's very simple to do.
Old 08-08-2007, 02:18 AM
  #7  
Swilliams97
Intermediate
 
Swilliams97's Avatar
 
Join Date: Oct 2006
Posts: 41
Likes: 0
Received 1 Like on 1 Post
Default

I'm about ready to clean the throttle body as in the refernced post. Sounds just like the problem I am having. One question......do I need to the the "throttle adaptation" for a 03 996? Cant find anything about "e-gas".
Old 08-08-2007, 02:20 AM
  #8  
CosmosC4S
Three Wheelin'
 
CosmosC4S's Avatar
 
Join Date: Jul 2006
Location: NEast Florida
Posts: 1,521
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Swilliams97
I'm about ready to clean the throttle body as in the refernced post. Sounds just like the problem I am having. One question......do I need to the the "throttle adaptation" for a 03 996? Cant find anything about "e-gas".
Yes, do it before startup after cleaning.
Old 08-08-2007, 02:23 AM
  #9  
SpeedPhreak
Intermediate
Thread Starter
 
SpeedPhreak's Avatar
 
Join Date: Aug 2006
Location: Milwaukee / Chicago
Posts: 28
Received 0 Likes on 0 Posts
Default

Sweet! My K&N makes this a little more complicated, but the DIY detail is documented well enough that I should be fine.

Thanks!
Old 08-08-2007, 08:09 AM
  #10  
gota911
Newbies Hospitality Director
Lifetime Rennlist
Member
 
gota911's Avatar
 
Join Date: Apr 2005
Location: Winston-Salem, NC
Posts: 18,084
Likes: 0
Received 34 Likes on 33 Posts
Default

Cos - nice DIY write-up!
Old 08-08-2007, 10:05 AM
  #11  
ArneeA
Drifting
 
ArneeA's Avatar
 
Join Date: Jan 2007
Location: 91x15
Posts: 3,422
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by CosmosC4S
You could do a search for it on the site,
or I have a DIY writeup: LINK HERE

It's very simple to do.

Nice. Thank you! I found your post on RennTech too.
Old 08-08-2007, 11:56 AM
  #12  
michael.s.under
Three Wheelin'
 
michael.s.under's Avatar
 
Join Date: Jan 2007
Location: Peoria, AZ
Posts: 1,258
Likes: 0
Received 0 Likes on 0 Posts
Default

Nice, I love that write up. At first I was a little concerned about the car being difficult to work on (have owned BMW in the past). But am surprisingly happy that this car has been a DIY dream.
Old 08-08-2007, 02:23 PM
  #13  
nycebo
Three Wheelin'
 
nycebo's Avatar
 
Join Date: Oct 2005
Location: New York, NY
Posts: 1,806
Received 18 Likes on 12 Posts
Default

Out of curiosity, when you said "turn on the ignition", did you mean to start the car, or just turn the ignition to the pre-start phase? I cleaned my throttle body a while back, but never did this procedure.
Old 08-08-2007, 03:36 PM
  #14  
CosmosC4S
Three Wheelin'
 
CosmosC4S's Avatar
 
Join Date: Jul 2006
Location: NEast Florida
Posts: 1,521
Likes: 0
Received 0 Likes on 0 Posts
Default

Thanks for the compliments on the DIY writeup, guys!
Glad it's helping some people out, eventhough it's a very simple job.

nycebo, it means turn the key to on, no cranking to start.
I'm sure the car's had a chance to adapt by now if you've done it a while.
But you can always do the adaptation procedure anytime, it's kinda like restarting your home computer, I guess?
Old 08-08-2007, 09:18 PM
  #15  
dresler
Burning Brakes
 
dresler's Avatar
 
Join Date: Apr 2007
Location: MA, the cradle of random driving
Posts: 870
Likes: 0
Received 0 Likes on 0 Posts
Default

yes, that is a great writeup. Besides, if Pinocchio says so, I must agree.


Quick Reply: Weak Sounding Intial Engine Start Up



All times are GMT -3. The time now is 06:27 AM.