T-5R Idling really high intermittently.
#1
T-5R Idling really high intermittently.
Intermittently, my car goes into this mode where it idles high.
When I'm driving it's a little over 1k rpm.
When I put it in park it goes to 3k rpm.
When I shut it off after it does this, it won't start for hours -- as if it's flooded.
The car is a 1995 850 T-5R.
P.S. Intermittent problems are the worst.
When I'm driving it's a little over 1k rpm.
When I put it in park it goes to 3k rpm.
When I shut it off after it does this, it won't start for hours -- as if it's flooded.
The car is a 1995 850 T-5R.
P.S. Intermittent problems are the worst.
#4
#6
Found it.
It was my Temperature Sensing Unit (TSU).
I searched and read around and found that a faulty TSU causes the ECU think it's colder than it really is.
If your TSU is failing, you can see your in-dash gauge fluxuating.
Normally, when the car warms up fully, the needle stays steady slightly above 1/2 way.
You can tell when it's failing because the needle moves slightly or doesn't go all the way up to the normal position.
When it fails the temperature it sends to the ECU is -40 degrees (default maybe) and the car revs higher to compensate for extreme cold.
It mixes richer and actually does flood and you can even smell gas under the hood.
Several hundreds later, what fixed it was a $30 part.
I miss the money less when I think: "Hey... I won't need to clean or replace my throttle body, idle air control valve, or idle control module (a few more I can't remember) for long time."
I searched and read around and found that a faulty TSU causes the ECU think it's colder than it really is.
If your TSU is failing, you can see your in-dash gauge fluxuating.
Normally, when the car warms up fully, the needle stays steady slightly above 1/2 way.
You can tell when it's failing because the needle moves slightly or doesn't go all the way up to the normal position.
When it fails the temperature it sends to the ECU is -40 degrees (default maybe) and the car revs higher to compensate for extreme cold.
It mixes richer and actually does flood and you can even smell gas under the hood.
Several hundreds later, what fixed it was a $30 part.
I miss the money less when I think: "Hey... I won't need to clean or replace my throttle body, idle air control valve, or idle control module (a few more I can't remember) for long time."
Last edited by T5-R; 10-31-2012 at 04:04 AM.
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