Misfire?

I sparked my Dino up this weekend after its winter's rest. Gave it a good polish and checked all fluids ahead of some planned motoring over the coming weeks and months. Thoroughly enjoy putting some decent miles on it and have some good trips planned. However, on starting it up and driving it round the block, it sounded a bit tractor-like....not firing cleanly on all cylinders. It was put to bed after a 200 mile run in the autumn and the last half hour or so was stop-start London traffic....and I do remember it wasn't pulling away that cleanly at the very end of the run. Normally runs and pulls as smooth as a train.

I suspect it is a dodgy spark plug as this was a problem I had once before. My question is, given I am not Mr fixit myself - and please forgive dim question as I suspect many of you out there could sort the problem out yourselves - but does it need to go on a trailer to a decent mechanic to get it fixed and tuned up, or will the engine be OK if I drive it slowly over the 40 miles or so to the garage I usually use? I suspect the trailer option would be best and safest. If it is a spark plug issue.....might I be able to solve it myself? I can certainly take one out and replace with a new one.....but am thinking that there might be a bit more too it than that? I do wish there was an engine expert in central London who would do 'house calls' but while there are lots of dealers, I don't know of any decent mechanics.....does anyone on the forum?

 

Thanks all - especially Tony....will do as instructed.....will leave redline option for later!!

 

Thanks all sorted - loose spark plug, running sweetly now, 45 minute blast and reminded myself all over again why it's such a wonderful car! Roll on some decent weather and more miles.