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Topic: Erratic lumpy idle 2.3 (Read 2362 times) |
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Jeff
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I love YaBB 1G - SP1!
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Erratic lumpy idle 2.3
« on: Jul 24th, 2014, 12:37pm » |
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Hi guys,
You haven't heard much from me lately as my 2.3 has been behaving so well. Until yesterday.
Stopped for fuel, but on restart the idle had gone all over the place. As soon as I drove away from the petrol station it was ok, but with a loss in power (difficult to judge in traffic). I suspect coil packs, but on looking under the bonnet I think there was a hissing sound.
In the past this car has had the plastic inlet manifold either repaired or replaced, could this be the cause?
Any ideas??
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2.9 Cosworth saloon and 2.3 saloon
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Simmo
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Re: Erratic lumpy idle 2.3
« Reply #1 on: Jul 24th, 2014, 12:39pm » |
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Certainly could. Is there any sign of water loss? The other thing to check is the MAF. 
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Jeff
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I love YaBB 1G - SP1!
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Re: Erratic lumpy idle 2.3
« Reply #2 on: Jul 24th, 2014, 12:57pm » |
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Not that I'm aware, but didn't check water level - had no warning mind (would I have done? Not sure if level is monitored, is it just the gauge?)
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2.9 Cosworth saloon and 2.3 saloon
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Simmo
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Re: Erratic lumpy idle 2.3
« Reply #3 on: Jul 24th, 2014, 1:21pm » |
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There is a float device in the water reservoir which will eventually indicate low level on the instrument panel BUT you could lose some water before that happens. Look at the level indicated on the unit. IF it started badly but then ran fairly well it could be the head gasket has gone. Have you checked the oil filler cap?. Is there any sign of 'mayonaise' on it? A sure sign of water and oil having mixed. 
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Simmo
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Re: Erratic lumpy idle 2.3
« Reply #4 on: Jul 24th, 2014, 1:31pm » |
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The entire handbook is Here. The page showing the radiator water level warning light is page 9. 
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Jeff
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Re: Erratic lumpy idle 2.3
« Reply #5 on: Jul 24th, 2014, 2:11pm » |
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gawd...got me worried now
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2.9 Cosworth saloon and 2.3 saloon
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Tompion
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1997 2.3 Ultima estate.
Posts: 2918
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Re: Erratic lumpy idle 2.3
« Reply #6 on: Jul 24th, 2014, 4:54pm » |
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My first thought was as you say a coilpack.
I don’t remember ever seeing a thread in which a cracked manifold affected the intake side (apart from one where the EGR melted it internally).
Check all the vacuum hoses.
Some of the late cars didn’t have coolant level warning lamps.
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a900one
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A scorpio is for life not just for christmas
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Re: Erratic lumpy idle 2.3
« Reply #7 on: Jul 28th, 2014, 10:31am » |
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My 98 cosworth is without a light  .
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Jeff
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I love YaBB 1G - SP1!
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Re: Erratic lumpy idle 2.3
« Reply #8 on: Jul 28th, 2014, 7:48pm » |
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Well thank you all for your replies. I'm afraid I dumped it on my service garage last Friday as we were away for the weekend, and said fix it. The good news came soon after they started work on it, finding a pipe that had come adrift. I felt rather stoopid not having seen it myself, but didn't really have a proper look.
So my fears of cracked inlet manifolds or head gaskets were unfounded and I'm back on the road in a very nice example.
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Simmo
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Re: Erratic lumpy idle 2.3
« Reply #9 on: Jul 29th, 2014, 7:10am » |
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Jeff that is great news.
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Glyn
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Now an OAP ! 95 cossie and another !and a 12v
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Re: Erratic lumpy idle 2.3
« Reply #10 on: Jul 29th, 2014, 9:32pm » |
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Was it one of the notorious vacuum pipes ?
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