Sputtering problem with 2002 mustang
 

Hey guys,
What would cause a 2002 ford mustang to sputter at 60-65 MPH? The wife's car just started doing this weird sputter on the freeway. What's funny, the RPM to don't fluctuate, the speed of the car stays the same, and power stays on the whole time the car is in motion. This is weird.

Breakdown of the car:
Ford
Mustang
auto
3.6 or 3.8 V6
everything is stock on this car.

We would appreciate any help on the subject.

How many miles are on it? MAYBE a sign of the fuel filter getting plugged up? I have my doubts about that though as you should feel a reduction in power if it was getting fuel starved. Check the basics first, plugs, filters, any loose vac lines, electrical connections...

I forgot to mention that the spark plugs, fuel pump and, fuel filter are brand new. Also, I checked the plug wires to make sure there is a connection. I will need to check the vac lines. Could this be a vac line? everything works fine until you get to 55-65...

If all of those items are new then I am lost. Unless the trouble started at the same time the tune up was done?
There is a chance it could be a vac line, but honestly I doubt it is. Do you have a scanner to check trouble codes with? That will get you right to the source of the problem. If you don't have one, maybe a shop near you will scan it for a small charge and then you can take care of the problem at home.

You are sure it is the engine you are feeling and not the transmission acting funny?

Look on the steering wheel, the problem is circled for ya! LOL!!!!! But really, I think Autozone does free code scanning still, might be a good place to start as stated above.

You found the problem!! Nice work! :rofl:

Very funny. I didn't pick the car.

Just teasing. I actually just sold a 2000 GT Mustang a couple years ago. It was my wifes daily driver for a long time. I never had the same trouble you are and I wish I knew which direction to send you in. I think a scan at this time is your best bet.

Yeah, I think that is the next step.

:cheers: You might also check for any Ford tech bulletins on this issue, just a thought.