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Topic: idle tickover (Read 411 times) |
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eau_de_cologne
Newbie
old but interesting
Posts: 26
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idle tickover
« on: Oct 5th, 2008, 5:58pm » |
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Hi all
I think I read somewhere that if you leave the battery out for sometime on starting up again idle is very erratic, presumably managment system has fogotten what it's settings should be and has to relearn them.
I can get it idle by comming down very very slowly to it's proper idle speed, but it's very lumpy.
Will I have give it certain amount of time to relearn just idleling or give it a run, it dosn't have tax lol 
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Snoopy
Administrator
Very old.BAD tempered and missing friends.
Posts: 6278
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Re: idle tickover
« Reply #1 on: Oct 5th, 2008, 8:25pm » |
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You are quite correct the process is known as the " Drive Cycle" and is explained HERE.
I hope this information helps .
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eau_de_cologne
Newbie
old but interesting
Posts: 26
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Re: idle tickover
« Reply #2 on: Oct 9th, 2008, 9:34pm » |
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Thanks for that snoopy,
Although correct, not the answer I was hopping for, I'll have to work out a deal with the local constabulary. 
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Highlander
Moderator
Expert
13 Scorpios, XR4x4, Suzuki SJ413 for off road :)
Posts: 8244
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Re: idle tickover
« Reply #3 on: Oct 9th, 2008, 10:00pm » |
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Book it in for an MOT 
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on Oct 17th, 2011, 12:35pm, Simmo wrote:I give up ! Too much for an old boy!  |
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Jonnycab
Senior Member
Former owner of 2.3 Ultima Facelift saloon
Posts: 3900
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Re: idle tickover
« Reply #4 on: Oct 10th, 2008, 2:18am » |
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How long was the battery left off for ?
The tickover shouldn't be that bad when the battery is reconnected. Maybe the odd miss now & then until the PCM re-learns all its parameters, but nothing too serious 
Apart from a bad tickover being caused by a faulty idle control valve....if the engine hasn't run for a long while then it's possible that the fuel may have gone stale or moisture could have build up in the tank.
It's just a suggestion
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