csudhoff

Having some problems with our 98 Mustang Gt 4.6 V8... everything has been great with the car. I am experiancing the following problem and I believe its the battery but wanted to make sure.

Here is whats happening:
1. insert key
2. turn ignition
3. car starts
4. RPMs immediatly drop like and the car dies, engine shuts off.

I noticed the battery terminals were very corroaded, I cleaned them with a wire brush and still same problem. I think the battery has never been replaced. My g/f bought the car new in 98 and it has 98K on the car.

Any ideas? Am I correct about a possible new battery? Any other things I should be looking at?
Any help is appriciated!

Thanks in advance!
Craig - I'm new here by the way

ripper

Hmmm its starting so i dont think its the battery. Does it stay running after you warm it up a little?

Stalion415

thats what my moms expidition did some times, you just had to keep the rpm's high, for a few seconds until it warmed up a little bit, we never did figure out what it was, but it wasnt on every start.

droptoppony

Its the IAC

NORTON98

You could have a lot of carbon in the engine. Has the car been used for short trips like to the grocery store or for long trips. If there is too much carbon in the engine you can have it decarbonized which will also clean your fuelinjectors resolving another possible problem.

Mike

trance565

lets see, could be, the battery is dead, and so is the alternator, IAC, PCV, carbon build up, fuel lines are clogged, spark plugs are bad, wires are bad, etc.

kylebgt

How do you decarbonize a engine? Run some nitrous through it?? Those fuel injector cleaners dont decarbonize an engine do they?

csudhoff

Thanks for the help everyone! I am going to start with the IAC and see if this fixes the problem

ripper

4 steps to decarbonizing motor:
1. Start engine

2. Depress clutch and put in gear

3. Push excelerator to floor

4. Dump clutch and repeat steps 2and3 four more times

Repeat if necessary [sm=trust_me.gif]

csudhoff

I have been feeling a bit under the weather the past few days, today I had a chance to pull off the IAC and give it a cleaning. It was very dirty and i reinstalled it. I am still having the same problem as described above.

I also checked the MAF as well and I unpluged it and repluged the connector. BTW the MAF was replaced about a year ago.

Any other ideas?

How would i check to see if the plugs & or wires as well as the alternator bad?

Thanks again everyone for your input!