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Did you try the WD40? I had the same symptoms as you and that fixed it. After I got the car serviced the problem never returned....
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Thanks Martin,
Ok heres a more detailed story. Some time ago I noticed it doing this the first thing I did was check the plug leads and compression.
No1 lead had been shorting out on the cam cover. and no1 piston had no compression.
So I put new cheap plug leads on (originals too expensive) and sparkplugs renewed. Drove the car for a while and the cold start problem went away. Later I checked no 1 compression again and found the pressure had returned to normal.
A little bit later I found the cold start problem had returned, but this time I broke one of the cheap leads when I was doing my testing.
So now I had convinced myself it was the idler, I had forgotten about all the above. and have been afraid to touch the leads again incase more broke. (I refitted one of the old leads in place of the broken one.)
Ok I will buy a new set of Mitsubishi leads regardless of cost.
Mitsubishi leads cost about 70 pounds
Blue print leads are too long and cost 28 pounds
leads I have fitted are the right length but the quality is visibly poor cost 12 pounds.
Thanks again for your input.
P.S. for anyone interested my theory on the compression is that when the cylinder was misfiring the unburnt petrol was washing the bore out, and when it started firing properly again the bore was eventually lubricated properly, hence, the compression returned.
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Curious as my leads were never replaced yet the WD40 did the job - as far as I know my 7 year old model is still on the original leads!
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I have been here before a long time ago.
I asked about a cold start problem my Colt was having.
W reg 1.3 12v Colt
was missing on start up, it gets worse in cold weather and clears up after two miles when engine is warmed a bit. Or if at start up you just put your foot on the accelerator and keep it in one position about 2000rpm the revs, ( as the engine warms up), jerks up in three or four stages to about 2600rpm (without moving your foot.
I did a service to it and changed plugs and leads when it first happened it went away and came back a few weeks later.
Since then I have been living with it. I have done a couple of compression checks, the first showed a piston to have low compression, resolved momentarily with a bit of oil - diagnosis piston ring worn. On other occasions the compression check has shown reasonable results.
I have now solved this problem for those who want to know such things,... I recently had the problem (even though it is summertime) and I was doing the trick of removing the plug leads one by one with the engine running. plug lead no.4 removal made no difference..hooray a clue! removed the plug and it was a bit oilly put the lead on it and started it up and watched the sparks ok - or so it seemed.
I Replaced the plugs, problem was solved on the following days. three weeks later same problem - looked at plug a bit oilly again.
My friendly mechanic says it could be piston ring, valve seal or head gasket. I have yet to do another compression check just to see what the latest results are.
I will post my new compression test results later. It is better to do a test with the engine hot - yes? and all plugs removed. Trouble is on the Colt I don't know where the fuel relay is so I disconnect the fuel injectors, this seems to work but I'd rather do it via the relay.
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