code 05 and code 13 (91 turboII)
Thread Starter
Joined: Jul 2002
Posts: 9,387
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From: Nashville, TN
code 05 and code 13 (91 turboII)
per the FSM:
- code 13 - pressure sensor (intake manifold pressure)
- broken wire/short circuit
- fail-safe function: intake manifold pressure input fix at 760 mmHg (29.9 inHg)
- code 05 - knock sensor
- broken wire/short circuit
- fail-safe function: ignition timing fixed
what exactly does it mean that the manifold pressure is fixed at 760mm of mercury? my ECU is constantly thinking that i am running 760mmHg of pressure? wouldnt that make the car insanely rich?
AND my ignition timing is retarded?
- code 13 - pressure sensor (intake manifold pressure)
- broken wire/short circuit
- fail-safe function: intake manifold pressure input fix at 760 mmHg (29.9 inHg)
- code 05 - knock sensor
- broken wire/short circuit
- fail-safe function: ignition timing fixed
what exactly does it mean that the manifold pressure is fixed at 760mm of mercury? my ECU is constantly thinking that i am running 760mmHg of pressure? wouldnt that make the car insanely rich?
AND my ignition timing is retarded?
Last edited by jacobcartmill; Jan 26, 2004 at 02:09 AM.
Joined: Oct 2003
Posts: 11,576
Likes: 27
From: Morristown, TN (east of Knoxville)
The pressure sensor defaults to vacuum, 29.9inHG is a measurement of vacuum, not pressure. The pressure sensor affects timing under boost, so bottom line your timing is off while this condition exists.
The knock sensor problem wouldn't affect how the car idles or runs, until you get well into boost. Just don't raise any hell until you fix it. The knock sensor is said to only be functional below 4krpms on the stock ecu anyway, after that it cannot discern knock from combustion in the violent rotary.
Sounds like you have a bad boost sensor and a bad wire from your knock sensor. Both easy fixes.
Your idle is the way it is, learn to live with it.
The knock sensor problem wouldn't affect how the car idles or runs, until you get well into boost. Just don't raise any hell until you fix it. The knock sensor is said to only be functional below 4krpms on the stock ecu anyway, after that it cannot discern knock from combustion in the violent rotary.
Sounds like you have a bad boost sensor and a bad wire from your knock sensor. Both easy fixes.
Your idle is the way it is, learn to live with it.
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