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
Technical 2009 fiat panda miss fire after changing spark plugs
- Thread starter Deemoandy
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Technical 2009 fiat panda miss fire after changing spark plugs
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
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
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
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
One coil goes to cylinder 1,4
The other to cylinder 2,3
The other to cylinder 2,3
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Is the idle very lumpy
Look at the video in the link I posted
Is it the same as when I start the car with two plugs disconected
Is it the same as when I start the car with two plugs disconected
Are we moving forwards ?
Just had a look at the panda.. checked all connections, all ok.. started car and still the same.. removed the cap off lead 1 and it didn’t make the car any worse.. lead 4 made it slightly worse when removed.. haven’t done 2 or 3 yet… is this looking towards a bad lead or a coil on way out ? Thanks in advance for the help
That's great, and progress
We know we are chasing a problem with at least cylinder 1
One and four share the same coil, the wiring to the coil and coil are almost certainly fine
And the problem is probably from the HT lead to plug
If take plug one and test for spark
But don't use the lifting eye on the panda, it's painted and insulated, use the negative battery terminal.instead
We know we are chasing a problem with at least cylinder 1
One and four share the same coil, the wiring to the coil and coil are almost certainly fine
And the problem is probably from the HT lead to plug
If take plug one and test for spark
But don't use the lifting eye on the panda, it's painted and insulated, use the negative battery terminal.instead
You've got four leads to swap them over and find out which parts aren't working
Don't assume new parts are working, I just had two fail on fit (FOF) starter motors for a Kia picanto at the moment
If I didn't have a working one I could easily be going around in circles
You should have 4 reasonable plugs that came out to test with also
Don't assume new parts are working, I just had two fail on fit (FOF) starter motors for a Kia picanto at the moment
If I didn't have a working one I could easily be going around in circles
You should have 4 reasonable plugs that came out to test with also
If the plug leads come off at both ends plug and coil, then you can check for continuity using a basic multimeter set to ohms, touch either end of each lead with the two probes and you should get a reading. If no reading, that plug lead is broken internally, usually caused by yanking on the plug lead rather than the plug cap when disconnecting plug leads as leads are carbon string inside which is fragile, it used to be quite common before newer vehicles built the coil packs onto the top of engine directly above the plugs.
