1999 Ford Mustang GT from North America - Comments

Thanks to the guy that wrote the article on Oct. 7th, 2005. You just saved me a couple of hundred bucks.

I followed your instruction and found that the Idle Air Control Valve (IAC Valve) had excessive amount of carbon build up and needed replacement. I spent more time purchasing the part than what was spent changing it out. To follow-up I also clean my K & N Filter, mass air flow meter and the throttle body assemble.

Thanks again.

I had my 99 gt for about 9 months now and I did stall out twice, but this was because this was because of a faulty clamp on my vacuum line, I was wondering if running a 100 shot of nos will destroy a 4.6 engine I've heard stories and wasn't sure if I should get one.

I have a 98 GT 5 speed with 85,000 miles on it. Bought it new. Never had any problems. I change the oil and rotate the tires every 3000 miles. My mechanic friend told me it should last up to 200,000 miles! What (17 inch) tires are best to prevent problems in rain with traction? My first set of Kumhos were not to good and when I bought my next set and asked for better traction, I got tires that were worse.

Why don't all the people crying about mustangs being junk trade them for camaros. Then they can see what true garbage is.

I have a 99gt I recently put a cold air intake on it and it ran great. but once I got it on the highway the check engine light would come on. I put back on the stock box and the engine light still comes on, but it takes a little longer. what should I do.

I have a 2001 Mustang Gt with about 65k and its been running great. However the other day I stomped on the gas and it normally hits about 4000 rpms and it hits hard. However this time it reached the same rpm and starting stalling and sputtering. The stalling only lasted a few seconds. The car ran fine for about 5 minutes then starting stalling so bad I had to pull of the road. It was as though no gas was being received. I was able to start it and about 5 min later it did the same thing. This time it wouldn't start. After repeated attempts it finally cranked up. I was able to get it home. Now it runs fine except when I stomp on the gas. It doesnt matter if I'm sitting still or on the highway. As soon as it reaches 4000 rpm's it boggs down and starts sputtering. But, if its idleing in nuetral I can rev the engine and no problem. Any suggestions would be appreciated.

I own a 99 gt (REAL limited edition) has a bunch of bolt on's and dynoed at 251rwhp. The 260hp ford claims is NOT rwhp. So actualy the stock 99 gt are 230ish rwhp. I love my GT. I got the black exterior and the black and silver leather. I get lots of compliments all the time. Here is a pic (probly won't work) (IMG) http://i5.photobucket.com/albums/y178/jcint/108-0833_IMG.jpg (/IMG)

I have a 98 GT. When I test drove it, I didn't have a problem with reverse or 5th gear. Now it grinds when I shift into 5th gear. I read somewhere else that shifting too fast can cause this to happen. Any truth in that? Also it grinds going into reverse. Doesn't happen all the time. I read where if you shift into 5th gear then to reverse, it doesn't grind. Any truth in that?

I have a 1999 GT Convertable Limited Edition in Performance Red with the 5 speed manual trans. Approximately 90,000 on the clock. The only problems... rear end bearings at 65,000 and a clutch at 75,000. The clutch discs weren't worn but the release bearing was raising cane. A hot looking and running car!

This is an old topic, but when searching for the fix to my 2000 GT it came up. My issue was the IAC (Idle Air Control Valve). I replaced this for $60 cheap or Motorcraft for $115 and everything has been fine. The problem is, (Car doesn't run well in the AM when its cold, or will not idle when taken out of gear. It does run fine when you get on the gas, but will not idle.) Hope this helps.

To the guy with the bogging down when you gas it, sounds like a lot of things, cracked valve, fouled injector (s), or it's getting too much air from a crack somewhere.

As for my 99 Mustang GT 35th, it's a fine running car, has 70k miles.

You have bought a high performance machine that requires attention and love, as my grandpa said "you gotta pay to play", so if you're having problems fix it. We ain't talking about a family wagon, if you know nothing about cars then this is your chance to learn. This is what American muscle cars are all about, learning and improving. Don't be afraid of your car, add some HP and love getting dirty under the hood, or get a Geo and let some cop change your tire for you.

I also have a 1999 35th Anniv Mustang GT (Black with gray leather interior). It currently has 184,000 miles on the clock and still runs strong.

Over the years it's only had minor repairs such as alternators, clutch, rear end seal and that IAC which causes the idle problem however, this is by far the best and most reliable car I've ever owned.

I also believe that these cars are faster than the 2000-2004 GT models. My fiance owns a 5 spd 2003 GT with 70,000 miles on it. The other day we raced them against each other (stang vs stang) and I was amazed with the distance the ole' 99 put between the 2003. The 99 smoked the 03.

I would advise anyone searching for 1999-2004 GT to go with the 99. Awesome car. I wouldn't mind being buried in one.