Author Topic: engine rev'ing at random  (Read 547 times)

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gouba

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engine rev'ing at random
« on: 06 August, 2009, 10:43:56 AM »
Ive just started to notice my car rev'ing strangely when not under load, it will sit anywhere betweet 500 (almost to the point of stalling) and 2500 rpm.

It started happening after a long drive back from Mt Ruapehu.

Any ideas as to what could be happening?



more_fasterer

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Re: engine rev'ing at random
« Reply #1 on: 06 August, 2009, 11:55:52 AM »
I'd say that your base idle or your TPS position needs adjustment.  To set the base idle (for a SRxxDE or SRxxVE):

1.  Warm car up & turn it off
2.  Turn ignition on
3.  Disconnect TPS plug
4.  Start car
5.  Rev the car to 3000-3500rpm and let it return to idle.  Repeat this two more times in quick succession
6.  The ECU is now in "set base idle" mode.  Hold the revs at 2000rpm for 15-20 seconds to clear out any unburnt fuel.  When it drops back to idle it should stabilise at 850rpm (P10), 800rpm (P11).  If not, wind the base idle screw anticlockwise to raise rpm, or clockwise to lower it.  Once you've adjusted it, repeat this step until it consistently returns to the correct rpm.

Once you've set the base idle, turn the car off & reconnect the TPS plug.
« Last Edit: 06 August, 2009, 11:58:51 AM by more_fasterer »
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gouba

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Re: engine rev'ing at random
« Reply #2 on: 10 August, 2009, 02:32:41 PM »
awesome! thanks :)