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mg zs lumpy when cold UPDATE

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Old Feb 3, 2011 | 06:18 PM
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Default mg zs lumpy when cold UPDATE

been offered a 1.8 for dirt cheap with t&t, headgasket not long replaced, serviced in dec. been told it idles bit funny when cold. any ideas on a likely cause? coilpack maybe?

Last edited by fiestaturbo1984; Feb 5, 2011 at 01:44 PM. Reason: update
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Old Feb 4, 2011 | 07:13 AM
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Could be a few things, even the cts, ring 01953 456000 and ask for richard, he does nothing but these cars all day everyday, so knows them inside out, he talks a lot(think he's lonely, or gay ha ha!!) but will help out.
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Old Feb 4, 2011 | 07:59 AM
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Originally Posted by fiestaturbo1984
been offered a 1.8 for dirt cheap with t&t, headgasket not long replaced, serviced in dec. been told it idles bit funny when cold. any ideas on a likely cause? coilpack maybe?
Check inlet manifold gasket on cylinders 1 and 4, well known to let coolant into the pots. Have a look at the colour of the plugs compared with each other.
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Old Feb 4, 2011 | 08:41 AM
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cheers, going to have a look at it shortly, its put engine management light on if thats of any relevance
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Old Feb 4, 2011 | 09:46 AM
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Its one of the sensors, mine did it on my ZR, cant remember which..diagnostics will tell you, once its warmed up it should run fine
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Old Feb 4, 2011 | 02:50 PM
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well, i bought it. very happy for what i paid. as for the symptoms, from cold it drives fine and when up to temp it still drives fine however a couple of times on the way home when accelerating it hesitated, sort of like a miss-fire. any ideas?
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Old Feb 4, 2011 | 03:02 PM
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Have you read the fault code?
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Old Feb 4, 2011 | 03:12 PM
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dont have any way of doing so,no diagnostic eqpt
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Old Feb 4, 2011 | 03:18 PM
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On my mate's rover it's got an LED on the ecu which will flash a certain number of times to give you the fault codes.
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Old Feb 4, 2011 | 05:07 PM
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Originally Posted by RichieST
On my mate's rover it's got an LED on the ecu which will flash a certain number of times to give you the fault codes.
THat's an old Honda engined car, the Rover ecus didn't have that facility.
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Old Feb 4, 2011 | 05:55 PM
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gonna find somewhere that can put it on a diagnostic see if that gives me any clues
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Old Feb 4, 2011 | 06:04 PM
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if its missing under load prob a coil pack
very common on these
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Old Feb 4, 2011 | 06:15 PM
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yeah thats what i was thinking, doesnt do it all the time, only about 5 times in the few hours i have been driving it
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Old Feb 4, 2011 | 06:52 PM
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I would put money on inlet manifold gasket, commen as fook and cause a missfire when cold
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Old Feb 5, 2011 | 01:46 PM
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ok so i have been to my local motor factors and so far i have changed both the coil packs.not driven it yet but the eml is still on,does it need to be reset or is it the same as my old 620ti with a self learning ecu which adapts after a few miles. i have also ordered a inlet manifold gasket which i will change aswell to be in the safe side
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Old Feb 5, 2011 | 02:17 PM
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well ive taken it out for a drive and on the 20 minute drive it done it again about 4 or 5 times so its not coilpacks
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Old Feb 5, 2011 | 02:59 PM
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seems to me like youre pissing in the wind without the fault codes being read, for the price of two coil packs you could have got that done now.
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Old Feb 5, 2011 | 03:04 PM
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its not the end of the world with regards to coilpacks, i can get refunded on those, its trying to sort it now when garages are closed
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Old Feb 5, 2011 | 03:16 PM
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As above, there is a light on the dash waiting to tell you what the fault is. Get it read first, then fix whatever needs be
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