Two questions:

1) My 00' GT, 53k will once every blue moon right at startup act like its misfiring for a few seconds and then idle funny until I start driving. Then it runs just fine.

I just had the plugs and wires replaced (not Bosch), so I don't think its related to that. Could it be the IAC valve, MAF related? Fuel pressure?

It happens like once a month if that, so I am not too worried.

2) I just put new tires on the car with a higher speed rating - T vs. the S Goodyears that were on there originally. I'm keeping it to the pressure as stated on the trunk (30psi). Is that the proper pressure?

Thanks in advance.

Regarding your misfire, check the area where the wires connect to the coils and add a little dielectric grease, you may be getting some moisture in the boots and until it burns out is causing the misfire. Second, add some fuel injector cleaner, possibly a dirty injector. Finally, clean the mass airflow sensor. It can sometimes cause a misfire especially on start-up. Us electronics cleaner and don't touch the wires.

What brand of spark plugs and wires were installed?

Also, it is always a good idea to get fuel system pressure tested to make sure it in in spec. at 48 - 55 psi.

It happens like once a month if that, so I am not too worried.


thats just you're car having it's period. I hear if this doesnt happen 9 months later a piston shoots out your tailpipe. haha

tires should be good at that psi.. i have crappy tires but i usually run 32 all around

is it throwing any codes when you say it misfires? otherwise just do what the Dad said.

thats just you're car having it's period. I hear if this doesnt happen 9 months later a piston shoots out your tailpipe. haha


Funny stuff! :lol:

Also you might want to check that all spark plugs have the right gap...my car had the same symptoms and it was because a plug was off by.012...