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Topic: Slight 'miss' from cold (Read 658 times) |
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Nick_H
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'97 2.3 Ultima
Posts: 152
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Slight 'miss' from cold
« on: Feb 16th, 2007, 1:32pm » |
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Hi all,
Long time no forum - it's good to be back!
My car has started doing something odd. About a minute after pulling away from a cold start, the engine seems to 'miss' slightly for a few seconds.
The car kind of jerks a bit rather than pulling smoothly.
After maybe 5-10 seconds, the effect goes away and has never yet come back during 'normal' driving.
If I dip the clutch while it's happening, the engine doesn't stall and the revs seem to flatten at a normal level. EDIT: Correction: it happened while I was in a traffic queue yesterday, and the revs were going up & down just slightly - what you might call 'hunting' I think...
Background: I recently got back off holiday and drove the car without checking fluids, etc. After this problem reared its head, I checked and found the coolant was LOW (almost non-existant).
It may be my imagination, but since I replenished the coolant, the 'jerky' effect seems to be wearing off slightly. Maybe coincidence...
My own thoughts were maybe the EGR or perhaps a Lambda sensor problem...
I'd be grateful if anyone could point me in the direction of a [more well-informed] likely cause/cure for this happening.
Anyone? Any guesses?
Thanks,
Nick_H
(Car is 2.3 '97 model with 51,000 miles behind it.)
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Nod Noffins
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hellblue
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Ill have silver,it dries just as fast !
Posts: 210
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Re: Slight 'miss' from cold
« Reply #1 on: Feb 18th, 2007, 10:45am » |
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I would look as to where the coolant has gone first, is it still going down?? the best way to check the other problem would be to get a scan done .
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Gary
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lurchy666
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I'm a YaBB newbie!
Posts: 9
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Re: Slight 'miss' from cold
« Reply #2 on: Feb 18th, 2007, 3:11pm » |
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if you've run it low of coolant have you got a air lock arount the area of the coolant temp sensor that'll cause it to run badly as it'll always be trying to run it too rich or too lean
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derekne
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PULL OVER
Posts: 282
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Re: Slight 'miss' from cold
« Reply #3 on: Feb 18th, 2007, 11:17pm » |
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on Feb 18th, 2007, 3:11pm, lurchy666 wrote:| if you've run it low of coolant have you got a air lock arount the area of the coolant temp sensor that'll cause it to run badly as it'll always be trying to run it too rich or too lean |
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Hello nice to see you back
Yea!! I agree with above
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derekne
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Simmo
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I'm an OAP !
Posts: 5508
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Re: Slight 'miss' from cold
« Reply #4 on: Feb 19th, 2007, 7:59am » |
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Nick, If my memory serves me correctly Pegasus, you and I met at the Black Swan,(James King) a long while back?. I thought I saw your car parked by the cottages just north of the village the other day?, would that have been you?. 
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Nick_H
Full Member
'97 2.3 Ultima
Posts: 152
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Re: Slight 'miss' from cold
« Reply #5 on: Feb 19th, 2007, 9:29am » |
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Hi Simmo!
Yes, your memory is fine! 
But the car parked north of the village isn't mine - I know the one you mean - I sometimes see it parked there, too.
Back to the problem:
There have been no further signs of coolant loss at all, so that's a bit of a puzzle. I don't know how much was actually left in the system, but the expansion tank was pretty much empty.
I hear that clearing an air-lock in the coolant system can be a bit of a drag - anyone have any tips for that?
And if anyone else has any other thoughts on the problem, I'd be pleased to hear...
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Nod Noffins
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Simmo
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Re: Slight 'miss' from cold
« Reply #6 on: Feb 19th, 2007, 10:33am » |
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Nick, Try the Johnnycab method detailed HERE. Hope to meet up again soon. Mike.
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Nick_H
Full Member
'97 2.3 Ultima
Posts: 152
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Re: Slight 'miss' from cold
« Reply #7 on: Feb 28th, 2007, 8:53am » |
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Right, I'm gonna bump this up the list a bit...
I've had a go at clearing any air-lock in the cooling system - don't know how effective that's been, as the problem still exists...
Thinking about it, I'm not sure that could have caused the problem anyway - it only ever happens very shortly after starting the engine/pulling away. I'd have thought that with an airlock in the coolant, the problem would come & go at other times too... (Not an expert here, but it just seems likely.)
I wondered if any of the readings detailed on this page: http://www.fordscorpio.co.uk/instreset.htm might give me a clue? Anyone know what to look for?
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