it's not the first time i replace spark plugs for a vehicle in this kind of configurations.
and btw, nothing wrong with the car, but i put the current plugs in more than 70k miles (at about 30k) and 10 years ago. so i'm doing this as a preventative maintenance.
replacement of the 1st plug went very smoothly. when trying to fit the socket to remove the second old plug, it didn't seem to be able to get in place. then i realized that the rubber ring piece of that wire boot came off and got stuck in the well with the spark plug.
searched online but couldn't find any effective hint. valve cover gaskets are actually leaking very gradually. so i was thinking to get a set of valve cover gaskets and hopefully when the valve cover is removed, it'll be much easier to get the stuck rubber piece out.
then i went ahead and plugged the wires back in place with 1 new plug and 3 old plugs.
worst part comes now:
tried to start the car, it wouldn't fire up. i could tell that starter kicks in and spins the engine, but engine was running very tough before i let go the ignition key; and as soon as i let go the ignition, it just dies.
i thought it might be because the one single-ground DENSO (new plug) is not working well together with the other 3 double-ground BOSCH (old plugs).
so i put the old one back in to have all four old plugs just like before.
tried to start the engine again. exactly the same symptom.
it really sucks when this happens when the car was running perfect and i'm just doing something that's supposed to be very simple.
what could it be?
i'm guessing that it's the wire set that has gone bad.
but i haven't done anything special to it really. just pulled them out and put them back in. the contacts still look good to me.
what else can that be? it makes me worrying now.