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Renault scenic misfire?

I have a 2001 Renault scenic 1,4 that misfires.If i remove either 1 & or 4 leads to the spark coil the motor stalls yet if i remove either of 2 or 3 leads the motor shudders but does not stall...Is this correct & if not then what does it mean. If i change 2 & 3 spark coils to 1 & 4 position the same happens, indicating it cant be the coils.
If the engine changes each time a coil lead is removed surely that indicates that all are good, as well as the spark plugs.
I had the misfire a week ago, changed 3rd coil & still misfired,,,put old coil back & ..fixed!!!..now a week later the same problem but with all coils good when done as above??????......is there a central coil pack..i am so confused..help please.
Parky058, June 2011
The main problem with your car is, it's a crap Renault. Save your money replacing different items to try and fix it and take to a scrappy, then buy a decent car.

DB, June 2011
could be your head gasket between no.2 & 3 cylinders

cdc, June 2011
link Click here to see other fixes for Renault Scenic 1.4.