Need help!

[79dan]

Hey guys!
I'm having problems to start my Mustang GT '00. It sounds like it starts ok, but shuts off by itself almost immediately. I have to press the acelerator at the right moment after it cranks to prevent it from shutting off. It works perfectly afterwards.

I also have a P0340 "Camshaft Position Sensor A Bank 1 Circuit Malfunction" code (I read it might be because of a bad alternator) and I noticed the lights (both exterior and interior) seem to flicker sometimes. Not sure if it's all related.

What do you think?

 

[COramprat]

Holding the accelerator to keep it running is a classic IAC problem.

Have the alt checked before you swap that out.

 

[Pitbullstang]

Save some money and try cleaning your IAC, my 99GT did the same thing, start then cut off after I cleaned the IAC it starts nice and hasn't cut off…so good luck!!

 

[79dan]

Well, I cleaned the IAC and it has started just fine two times in a row. I'll test it again tomorrow.

I really appreciate your help!

 

[COramprat]

Good to hear but as a side cleaning it helps for a little while. It could go on the blink again requiring replacement.

 

[Pitbullstang]

Know problem…Coramprat is right, it could go on the blink again, and I have seen some times they do that, work for a couple of weeks then start acting up again, so what I do is just clean the IAC once every couple of weeks its been about 5 month and its still cool but all cars are different..

 

[79dan]

Well, after thoroughly cleaning the IAC, the car started just fine all day (about 7 times) and then the problem reappeared. I figured I'd better buy a new one, so I replaced it and it didn't seem to make any difference It's still shutting off about 60% of the times. It cranks and then shakes a little and dies.

Pressing the accelerator still does the trick, so I'll continue doing that while I figure out what's wrong.

BTW, I bought this car a couple weeks ago, and it was working ok until this problem started. Maybe it just needs a major tune-up? Any other ideas?

 

[COramprat]

Have you changed the fuel filter?

 

[RedDaemon]

Have you changed the fuel filter?

that.

or

vacuum leak. open your hood and have someone stand in front of the car listening for any high pitched whining/squealing