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993 backfire, boom!... Intake separated

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Old Sep 30, 2016 | 04:03 PM
  #16  
Vorsicht's Avatar
Vorsicht
Burning Brakes
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Joined: Feb 2010
Posts: 1,143
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From: Apex, North Carolina
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No. 23 confirms you have a mixture issue. Here is what the code means:

Fault 23, Test point 8

The oxygen regulator cannot operate within its control range if
extreme problems of mixture preparation occur, e.g. due to an excessively
lean setting because of unmetered air, or due to an excessively
rich setting because of a faulty injector valve. The oxygen
regulator then moves up to the stop position.

Oxygen regulation too rich:
.Check intake system for leaks

Oxygen regulation too lean:
.Check fuel pressure<-----------------------------------------!!!
.Check injector valves for leaks
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Old Sep 30, 2016 | 07:05 PM
  #17  
watsondenmark's Avatar
watsondenmark
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Joined: Sep 2016
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From: Copenhagen, Denmark
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Thanks man!

I just thought that code 23 was bothered by the fact that the intake was blown apart ... a gigantic leakage and thus an incorrect mixture.

Oxygen sensor is easy to replace ... I just need to find out how I measure fuel pressure, and / or find out which injector that may have a leak (there is no external leakage in the injectors).

All this without starting the car... that boom cant be good for anything...

Originally Posted by Vorsicht
No. 23 confirms you have a mixture issue. Here is what the code means:

Fault 23, Test point 8

The oxygen regulator cannot operate within its control range if
extreme problems of mixture preparation occur, e.g. due to an excessively
lean setting because of unmetered air, or due to an excessively
rich setting because of a faulty injector valve. The oxygen
regulator then moves up to the stop position.

Oxygen regulation too rich:
.Check intake system for leaks

Oxygen regulation too lean:
.Check fuel pressure<-----------------------------------------!!!
.Check injector valves for leaks
Reply
Old Sep 30, 2016 | 07:25 PM
  #18  
Vorsicht's Avatar
Vorsicht
Burning Brakes
15 Year Member
 
Joined: Feb 2010
Posts: 1,143
Likes: 29
From: Apex, North Carolina
Default

Originally Posted by watsondenmark
Thanks man!

I just thought that code 23 was bothered by the fact that the intake was blown apart ... a gigantic leakage and thus an incorrect mixture.

Oxygen sensor is easy to replace ... I just need to find out how I measure fuel pressure, and / or find out which injector that may have a leak (there is no external leakage in the injectors).

All this without starting the car... that boom cant be good for anything...
You may be correct. Too bad the codes don't come with a date and time. Anyway, I would concentrate on fuel pressure test first - easy to do with proper gauge. See here:

https://rennlist.com/forums/993-foru...m-testing.html
Reply
Old Apr 15, 2019 | 09:29 PM
  #19  
Sagres74's Avatar
Sagres74
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Joined: Oct 2012
Posts: 611
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From: Tampa Bay, FL
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Were you ever able to pinpoint the issue?
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