spark plug change - now missing ?

Ok still a newbie to landrovers and mechanics but i am enjoying it ! Today i changed the spark plugs on my 1.8 freelander as supplied by britparts as part of a service kit (oil air etc) and since then it sounds rough and is missing. I have checked that each of the HT leads is pressed securely onto the spark plugs and not sure what else to check ??

i assume i was sent the correct plugs for the 1.8 and equally assume i shouldnt have to change gaps on the sark plugs if they were bought for a 1.8 freelander.

have i done something wrong or is it the plugs i have bought ?

any advice much appreciated as it was running great on the old plugs but i thought i was doing right chaging all plugs and filters as i have just bought it

thanks

Craig

I'm assuming you've made doubly sure that the ignition leads went back on in the correct order?

ye cant get thum wrong they would be either too long or too short heffs, you may have knackered a lead, or you may have duff plugs, i only ever buy NGK plugs, and unless the plugs are suffixed with a -11 or similar they are un-gapped and need gapping before fitting

could be running aftermarket leads.. Mine on the slitty will fit to the wrong pot

as said i couldnt get the leads in the wrong order as they are all separate lengths so one wouldnt reach if i got them wrong

you think i need to measure and adjust the gaps of the plugs ? surely if bought for a landy freelander they shoud be correct ?

could i have knackered a lead just by removing it ?

this saving money servicing yourself isnt proving too great so far !

leads are easy to fook up, over wime they get brittle with the heat from the engine, also the metal connectors corrode, as i said before unless you have gapped plugs (with a suffix number) you should gap them, i do even if they have a suffix.
i don't know who make britparts plugs for them but i would bet there ****, if i were you get some NGK plugs i will look-up the part no and gap for you

right you need PFR6N-11 thats a platinum tipped plug that is pre-gapped to 1.1mm don't try to re-gap these as it will damage the plug, these should have a service life of arround 40,000-60,000 miles they int cheap but they are the best (recomended by 99% of the motor trade and sold by my work)

G-man said:

right you need PFR6N-11 thats a platinum tipped plug that is pre-gapped to 1.1mm don't try to re-gap these as it will damage the plug, these should have a service life of arround 40,000-60,000 miles they int cheap but they are the best (recomended by 99% of the motor trade and sold by my work)

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Do as G-man says.

the ones i put in were NLP100290L - are these no good ? i suppose i need to put the old ones back in (which were running fine) to determine whether its the leads or the plugs - looks like thats me in the wheely bin then

Never heard of pregapped plugs been runnin deisels for a while now. But I would always check them even if you couldn't alter them. I dropped a plug once and closed the gap down slightly, took a while to work out what was wrong.

just put the old plugs back in and alls well again - all gaps are ok too so can only assume one of the plugs is a duffer - will get myself some NGK tomorrow (thats whats back in as well)