When I start the Mark up... it idles and runs fine. Then sometime after the fast idle shuts off it starts loading up.
If I take it out and punch it... it will clean out and runs like a scalded dog. Then next time it idles, it starts loading up again.
Have changed the plugs, looked for vaccum leaks and come up empty.
It is not throwing any codes on this problem, previously it had a P301 cylinder one missfire, and I replaced the coil and boot, and still had the code. But since it has started this rough idle problem, it has not thrown a code.
Park it, then start it the next day, runs fine at idle, and on the drive to work, go to lunch and let idle while grabbing a bite of lunch, it loads up.
Any ideas? Going to take it into Dealership soon, thought I would check here first.
TIA..
Rex
98 White Pearlescent LSC / 02 Silver Mustang Premium GT
http://www.mark8.org/users/pvteye/98LSC032a.jpg
If I take it out and punch it... it will clean out and runs like a scalded dog. Then next time it idles, it starts loading up again.
Have changed the plugs, looked for vaccum leaks and come up empty.
It is not throwing any codes on this problem, previously it had a P301 cylinder one missfire, and I replaced the coil and boot, and still had the code. But since it has started this rough idle problem, it has not thrown a code.
Park it, then start it the next day, runs fine at idle, and on the drive to work, go to lunch and let idle while grabbing a bite of lunch, it loads up.
Any ideas? Going to take it into Dealership soon, thought I would check here first.
TIA..
Rex
98 White Pearlescent LSC / 02 Silver Mustang Premium GT
http://www.mark8.org/users/pvteye/98LSC032a.jpg