Technical 2009 fiat panda miss fire after changing spark plugs

[Deemoandy]

Please advise.. 2009 fiat panda 1.1.. just changed the thermostat so removed the coil pack bracket. Then replaced the spark plugs.. whilst changing these. I disturbed the first (left side) yellow connector by the spark plug.. after reassemble and starting I now have a miss fire.. could it be the yellow connector or have I disturbed the coil packs / HT leads? Any advise would be appreciated

 

[Yolanda]

Are the plug leads on in the correct order and are they firmly pushed down onto the plugs. Try that to start with. It will be something simple as a bad connection as the engine was running fine (or was it before you changed the thermostat)

 

[Deemoandy]

Are the plug leads on in the correct order and are they firmly pushed down onto the plugs. Try that to start with. It will be something simple as a bad connection as the engine was running fine (or was it before you changed the thermostat)

Yeah was running great.. do you know what the yellow connections are by the plugs.. well I think they are yellow as I’m colour blind .. also how do I find the information on the correct order of plugs .. thanks in advance

 

[koalar]

I take by misfire your taking about a regular pop sound of a cylinder not firing

Start by working out which cylinder is not firing

This is my euro 5 which has slightly different layout

Koalar random thoughts | FIAT Panda (Mk3)

You can tell if the coil pack is getting a control signal and giving a good spark like this If one is weeker and the spark does not jump as far than the others it's suspect It is possible to get a jolt if you do something wrong, probably not a good idea if you have a pace maker As long as the...

www.fiatforum.com

Take each lead off the coil one at a time and start the car

The one that makes no difference is the one in that misfiring

Fingers crossed is just a lead on top of a plug that's not seated correctly

 

[Deemoandy]

I take it it’s a misfire as the revs just don’t pick up properly and sounds awful

 

[koalar]

One coil goes to cylinder 1,4
The other to cylinder 2,3

 

[koalar]

I take it it’s a misfire as the revs just don’t pick up properly and sounds awful

Is the idle very lumpy

 

[Deemoandy]

Yeah.. feels like it’s about to stall

 

[koalar]

Look at the video in the link I posted

Is it the same as when I start the car with two plugs disconected