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i fitted new plugs and leads, but the leads won't stay on! they keep working their way up! i only realise when i get a miss fire. i've tried pushing down really hard but no look. help!

wrong leads?

got them from the dealers! they wanted the engine code to make sure they got the right ones!

erm dunno then

remove the plastic over the engine, for better access and ensure they are in all the way and not cross-threaded?

try old leads and see if same problem?

is it all leads or the same lead every time if so maybe take the lead off and make sure there is nothing left on the plug from the old lead coz sometimes theres a little rubber bit comes off maybe or maybe not worth a try ha

I'm having a similar problem. Car has miss-fired but when i check the engine bay every couple of weeks, the far right hand side one has sort of worked its way up.

May try and remove the rubber bit as you say!

Mat

its just the one now! the guys at awrsome had a look at it and he was stumped!

does it do it with the old leads? if not then another think to check the lead itself that plugs onto the spark pulg the metal bit inside the rubber of the ht lead has a small cut out try crushing it a bit so it clips on to the plug tighter.

I’ve fixed it! But I don't know what was causing the problem. I striped off all the leads and plugs and started again. Making sure everything was clean.