spark plug blew???

[sickaccord]

i went and looked at a car tonight as some of you already know...before i got there he had taken it out for a drive today and when i looked at it tonight he said he blew one of the spark plugs today so only three were firering...the motor was rocking a lot too when i was looking at it and when he got on it it sounded like crap...is this a bad sign like is there something wrong with the motor... should i not get it now or what???was it bad that he was running the motor like that??? thanks

[KillerCam282]

If this is the same thing that happened to my boy, then he just needs to change his plugs.

[immeraufdemhund]

well the mounts only allow for so much movement with the engine. If it's rocking really bad just because one of the cylinders isn't firing then it might be that one of the mounts are bad. Which isn't all that bad cause I think it's about 50 for one of the mounts. Some how i think that the rear one has 2 types of mounts.. One that is just a solid rubber mount and the other is I think vacuum..or something with it.. Anywho if that goes bad or if you have a leak going to that mount it could cause it to look like it's fixing to fall out of the engine cause it's rocking soo bad. Once you get that spark plug fixed rev it up a couple of times and see how much it rocks. If it rocks more than say an inch or if it clunks when you rev it one of your mounts is bad. Check the rear and the front one.

Good luck with it.

[KillerCam282]

well the mounts only allow for so much movement with the engine. If it's rocking really bad just because one of the cylinders isn't firing then it might be that one of the mounts are bad. Which isn't all that bad cause I think it's about 50 for one of the mounts. Some how i think that the rear one has 2 types of mounts.. One that is just a solid rubber mount and the other is I think vacuum..or something with it.. Anywho if that goes bad or if you have a leak going to that mount it could cause it to look like it's fixing to fall out of the engine cause it's rocking soo bad. Once you get that spark plug fixed rev it up a couple of times and see how much it rocks. If it rocks more than say an inch or if it clunks when you rev it one of your mounts is bad. Check the rear and the front one.

Good luck with it.

In this case it may not mean the mounts are bad. I remember how my boy's F22 ran on 3 cylinders and its pretty violent.