Loss Of Power - AudiWorld Forums

Notices

Loss Of Power

Old 03-01-2018, 08:17 AM
  #1  
AudiWorld Newcomer
Thread Starter
 
Join Date: Mar 2018
Posts: 2
Default Loss Of Power

I have a 2008 Audi A4 2.0T and as of late I am getting little to no turbo response. My horsepower has dropped significantly and according to the temp gauge, the engine is running quite cold. However, I am getting the "coolant system performance" engine code and as a result of this, I tried swapping the coolant temp sensor with a new one to potentially fix the problem to no avail. My next best guess would be the thermostat itself but I really am just taking a shot in the dark. The two things might not even be related so if anyone could shed some light that would be a huge help! Thanks!
MattMayes31 is offline  
Old 03-13-2018, 07:11 AM
  #2  
AudiWorld Newcomer
 
Join Date: Feb 2018
Posts: 5
Default

Sounds like you're on the right track. Fail-safe thermostats can only fail on the open position, thus keeping your engine cool and preventing an overheat situation. I would definitely change the thermostat as it looks to have failed in the open position.
MisterJ is offline  
Old 06-09-2018, 07:07 AM
  #3  
AudiWorld Newcomer
Thread Starter
 
Join Date: Mar 2018
Posts: 2
Default Still having the issue

Originally Posted by MisterJ View Post
Sounds like you're on the right track. Fail-safe thermostats can only fail on the open position, thus keeping your engine cool and preventing an overheat situation. I would definitely change the thermostat as it looks to have failed in the open position.
I had the thermostat changed and it seemed to fix it for a while but once again Iím losing power, the turbo will randomly kick in on any given depression of the gas peddle and be gone on the very next. No idea what it could be now, no codes are being thrown and I have no idea what needs to be done
MattMayes31 is offline  
Old 06-29-2018, 07:57 AM
  #4  
AudiWorld Newcomer
 
Join Date: Feb 2018
Posts: 5
Default

Originally Posted by MattMayes31 View Post

I had the thermostat changed and it seemed to fix it for a while but once again Iím losing power, the turbo will randomly kick in on any given depression of the gas peddle and be gone on the very next. No idea what it could be now, no codes are being thrown and I have no idea what needs to be done
It's really hard to know if you're not throwing any codes. Any deviation from the expected boost should throw a code, so it may not even bee a boost problem. A couple of things I would suggest that may be stabs in the dark:

1. Check the ram air duct leading to your intake box. There's a pre-filter there that prevents your air box from filling up with debris, but it can get clogged up. I had a power loss situation and discovered that the pre-filter was completely plugged with Maple tree seeds - good 'ol Canadian Maple trees ;P

2. Have someone check your vacuum system. A leak in one of your vacuum lines can cause erratic throttle response behaviours

3. Perhaps find someone with VCDS or similar to do a more in-depth scan in case there's a situation recorded but not throwing a code. There are some tolerances in the system that won't throw codes, but they'll be logged. For instance, my car would misfire at least once or twice per cycle for each cylinder, but I never saw a code. I discovered it in the logs.

Good luck!
MisterJ is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
ssnsteamboat
A6 / S6 (C5 Platform) Discussion
1
03-13-2014 07:27 AM
gregory_v
12v V6 Discussion
3
12-25-2007 01:42 PM
Guilty
S4 (B6 & B7 Platforms) Discussion
3
09-02-2005 06:15 AM
BSCA4
A4 (B5 Platform) Discussion
2
01-26-2004 12:25 PM


Thread Tools
Search this Thread
Quick Reply: Loss Of Power


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: