Notices
928 Forum 1978-1995
Sponsored by:
Sponsored by: 928 Specialists

Low power on cold Start 1986.5 928S

Thread Tools
 
Search this Thread
 
Old 09-28-2022, 08:18 PM
  #1  
jjf112
Track Day
Thread Starter
 
jjf112's Avatar
 
Join Date: Mar 2022
Location: Irvine, CA
Posts: 18
Received 19 Likes on 4 Posts
Default Low power on cold Start 1986.5 928S

Hello, I've noticed recently that after I start the car when cold and start driving I sometimes get little power when hitting the gas. Sometimes it is delayed power. After 3-4 minutes, everything is good. Anyone know what the main culprits are? Thanks!
Old 09-29-2022, 03:24 AM
  #2  
FredR
Rennlist Member
 
FredR's Avatar
 
Join Date: Jun 2005
Location: Oman
Posts: 9,912
Received 758 Likes on 604 Posts
Default

Check that the temp2 sensor is reading engine temperature correctly.

This enables the computers to apply the correct transient enrichment while the motor warms up and that typically takes about 3 minutes.
Old 10-06-2022, 04:13 PM
  #3  
jjf112
Track Day
Thread Starter
 
jjf112's Avatar
 
Join Date: Mar 2022
Location: Irvine, CA
Posts: 18
Received 19 Likes on 4 Posts
Default

Thanks Fred. I bought the part from Roger and installed it. Unfortunately it did not do the trick. It is also getting worse, low power longer, maybe because the nights are getting colder. Any other ideas?

When it's cold and I press the gas there is usually a delay and then it lurches forward. When it does I hear a click - I am not sure if that is relevant.
Old 10-06-2022, 04:21 PM
  #4  
ROG100
Basic Sponsor
Rennlist
Site Sponsor

 
ROG100's Avatar
 
Join Date: Jan 2003
Location: Double Oak, TX
Posts: 16,837
Received 896 Likes on 341 Posts
Default

Did you powder coat the water bridge or paint it. The Temp II needs a good ground to the WB.
__________________

Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission? George Layton March 2014

928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."






Old 10-06-2022, 05:37 PM
  #5  
jjf112
Track Day
Thread Starter
 
jjf112's Avatar
 
Join Date: Mar 2022
Location: Irvine, CA
Posts: 18
Received 19 Likes on 4 Posts
Default

Hello, no powder coating. The ground looks good to me:





Quick Reply: Low power on cold Start 1986.5 928S



All times are GMT -3. The time now is 06:55 AM.