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Topic: Poor tickover (Read 637 times) |
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caterex
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I'm a YaBB newbie!
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Poor tickover
« on: May 2nd, 2006, 2:16pm » |
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Hi all
24v problems
Having completed 3000mls since chains and adjusters replacement I now have a problem with a very lumpy tickover as if the timing is out, just ready to cut out.A very rich mixture is indicated as well as a very black exhaust pipe.
Above 1500 rpm the car performs perfectly,no gearbox problems, changes up and down with out any hesitation. I have noticed the rev counter gets quite erratic after a short time running.
I have cleaned the IAC valve, and MAF, checked for leaks around the EGR system.
My other 24v is running and ticking over perfectly, so I can swop over bits to find out what or where the problem is,
as I do not want to end up two rough running cars,I would like some guidance to where to start and what to swap.
All help wil be greatfully appricated.
Fred
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David_South_West
Full Member
24V............ .Goodness
Posts: 188
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Re: Poor tickover
« Reply #1 on: May 2nd, 2006, 2:38pm » |
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Throttle position sensor....?
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Highlander
Moderator
Expert
13 Scorpios, XR4x4, Suzuki SJ413 for off road :)
Posts: 8244
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Re: Poor tickover
« Reply #2 on: May 3rd, 2006, 6:42am » |
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Try swapping the MAF, or disconnecting it to see if theres a difference on tickover, it might be broken
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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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caterex
Newbie
I'm a YaBB newbie!
Posts: 47
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Re: Poor tickover
« Reply #3 on: May 3rd, 2006, 8:01pm » |
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Thanks for your quick reply,I will be on it on saturday,and will let you know the result.
Fred
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sector-9
Senior Member
No scorpio anymore
Posts: 1069
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Re: Poor tickover
« Reply #4 on: May 5th, 2006, 8:41pm » |
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Erratic rev counter would suggest a problem with the crank sensor or it's wiring - this is also used for ignition timing amongst other things.
Darren
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caterex
Newbie
I'm a YaBB newbie!
Posts: 47
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Re: Poor tickover
« Reply #5 on: May 7th, 2006, 10:25am » |
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Swapped the MAF, no difference,dissconnected the MAF very slight change in rpm.
Swopped the following,TP sensor,IAC valve,VRIS,I will next look at crank sensor, but any problem there I am sure would show it self in other areas,the car runs perfectly above 1500rpm, I have recently returned from Devon and maintained very high crusing speeds non stop for 1.5 hrs no problems what so ever, it is only on tick over the problem occurs.!!
Is there a way to shut off the EGR valve to see does that make a difference.
Thanks
Fred
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sector-9
Senior Member
No scorpio anymore
Posts: 1069
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Re: Poor tickover
« Reply #6 on: May 7th, 2006, 6:46pm » |
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EGR valve is vacuum operated (at least it is on the diesels) - just pull the vacuum pipe off and plug it!
Darren
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Kjetil S
Senior Member
2001 BMW 520iat
Posts: 1419
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Re: Poor tickover
« Reply #7 on: May 7th, 2006, 8:19pm » |
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It's vacuum operated on the petrol versions too. Someone else will most likely have more in depth information about it.
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