Let me start off by saying that I've just begun learning about the mechanics of my car.
I am in no way more knowledgeable about my car then maybe a freshmen taking
his 1st HS auto class haha.
I have a 2004' Convertible (as the thread states) and it started to do something very concerning to me a few months back. I've talked to all my mustang owning friends and "die-hards" but they can't seem to come up with anything, so I figured next best thing would be Stangnet.
When I put my car in gear after it hasn't been driven for a period of time (usually over night, or while I'm at work) the idle makes a sound like its slowly dying/losing power (it would be impossible for me to put the sound on here aside from a video posting, and I may have to do that to). However, when I put the car into park it idles back up and sounds perfectly healthy. The kicker is that after I've driven it for about 30 seconds there are no more idle issues.
Also, if I'm putting gas to it there are no issues its only if I let it sit and idle in drive or reverse and again, if I'm getting the RPM's up the issue goes away instantly. Really confused as to what could be the problem.
--Self checks and fixes I've tried--
- I thought maybe it might need some new spark plugs, but the Motorcraft platinum plugs I have are still nearly perfect.
- I can still see through the Air filter so that isn't causing an issue.
- Throttle body is clean and clear.
- New battery was installed about a month ago.
