Technical What is the Spark Plug Gap Setting

[Idc]

Trying to get the correct spark plug setting for Fiat Panda Pop 2012+ 1.2 8v.
Some say they are preset; NGK set to 1mm, Deno set 0.8mm, some ridex preset to 0.7, and still vary depending on coper/nickel platinum or irridium.

I hope someone can help..

 

[koalar]

Aren't they fitted with a NGK ZKR7A-10 and with 1mm gap, I could be wrong

I Normally just follow the recommendations in the owners manual. Cross reference aren't always correct.

as long as they aren't dropped I have never had to adjust new plugs in decades

if the gap has opened up due to burning away then its time to change them.

 

[A3jeroen]

IIRC NGK DCPR 7E-N-10 is the right plug. the las 10 means the gap is supposed to be 1,0 mm. NGK pregaps them, but do check.

gr J

 

[koalar]

IIRC NGK DCPR 7E-N-10 is the right plug. the las 10 means the gap is supposed to be 1,0 mm. NGK pregaps them, but do check.

gr J

thanks gr ✔

is there a crossover date or engine code / serial number

in the later manuals

 

[koalar]

https://www.ngkpartfinder.co.uk/catalogues/cars/search/spark-plugs/

looks useful

just input your vehicle details and tells you the standard plug, upgraded plug along with its specifications and gap

 

[Idc]

hi
when you check that page it says the upgrade from ZKR7A-10 to iridium is ZKR7AI-8 and is gapped at 1mm gap (pre-set), but the code -8 denotes a gap 0f 0.8mm, would this then cause, bad combustion/spark hesitatiion etc.

I tried thesse and returned them because of hesitation and poor economy (4mpg less), motor factors said not to adjust the gap else warranty would be lost, so went back to ZKR7A-10 and no problem, still would like to upgrade my plugs hense the question.

 

[koalar]

in all honesty I have no idea

I only buy standard plugs and from a local motor factor. Common parts like injectors and spark pugs I don't buy online. Too many fakes/copies around. The standard plugs are good for 20,000 miles and can be pushed to twice that. Although you really don't want to be leaving plugs in for too long otherwise they start to became dodgy to remove from a soft aluminium head


The OEM fitment will always give the best fuel economy and performance. I have fitted the older style plugs into 69HP engine. I can't say I noticed any or much difference so they are fairly tolerant

I have seen plugs that haven't been changed in a long time. They start to misfire when they get to around 1.4 mm gap as long as the coils and leads are good. That's standard gap plus 40%

I have not experience of plug less than 1mm, I very much doubt you would notice anything in performance in using a correct plug with a .8mm gap.

a bit more info on plugs and the 69hp fiat engine http://www.fiat500usa.com/2010/02/inside-fiat-500-spark-plugs.html