Miss After Spark Plugs And Timing Belt Change

[luvpsi]

Hey guys I just changed my timing belt all starts fine and idles however when I lift the revs slightly it has a miss I also changed spark plugs the original ones the other bloke had iridiums capped at 1.1 I put coppers capped at .8 I'm only running 10psi with microtech cas is lined up in same position

[zebra]

Check your ignition timing, doesnt have to be out by much to change the timing a few degrees, plus with a new tight cam belt, the cams would be in an ever so slightly different position

[luvpsi]

its weird because i had it idling on first start up after change and gave it a few revs and it didnt do it then after it warmed up it developed the miss.

how do i check the timing with a timing light?

i just dont want to have to pull all the plugs out again if they dont need doing

[The Dan]

It may be possible you cracked a spark plug when installing them

[luvpsi]

mmmm but it ran fine for ages its only a small miss could changing the gap smaller could have caused it.

[zebra]

I once had the same slight miss at low load cause to too little gap on one plug...was at .5mm or so..opened it up and was fixed

[luvpsi]

yeah its a slight miss at about 1500rpm i might try and put my old plugs back in see what happens if that fixes it i will regap the new ones to 1.1

[luvpsi]

ok i changed the plugs back to the old one and still seems to do it but when i rev it its fine just if i hold the revs at a little higher than idle. now this is not while driving so going to take it for drive around block and see what happens

[luvpsi]

ok took for a drive drives fine and miss has stopped