Problems with V6

0

03mustangv6wh

Member

Apr 5, 2019

8

1

13

Virginia Beach

Apr 5, 2019

#1

• Apr 5, 2019

• #1

Hey everyone, I’m trying to figure out what makes my 2003 Ford Mustang V6 have a rough idle only when warm. It’s when I either let it idle for a bit or when it is warm and I run into a store or something and come back out and it acts like it wants to die. It’s only when it’s warm not cold. Cold is fine. I just replaced the spark plugs and wires. PVC.
Also I’m hearing a weird grumble from the back everyone once in a while.
Last thing my suspension makes some noise in the front, wondering what good stuff I can replace it with.
2003 Ford Mustang V6 white with 73k miles

 

wmburns

SN Certified Technician

Aug 14, 2009

5,892

514

204

Houston Texas

Apr 6, 2019

#2

• Apr 6, 2019

• #2

Suggest starting out by cleaning the MAF sensor.

Did you install all spark plug wires following the original factory routing and using all factory looms and ties downs?

Next double check that the cooling water jacket doesn't have any air trapped inside the motor.

V6 coolant refilling procedure
https://www.allfordmustangs.com/for...stang-irregular-rpms-showing-hot.html#2604913

 

0

03mustangv6wh

Member

Apr 5, 2019

8

1

13

Virginia Beach

Apr 7, 2019

#3

• Apr 7, 2019

• #3

wmburns said:

Suggest starting out by cleaning the MAF sensor.

Did you install all spark plug wires following the original factory routing and using all factory looms and ties downs?

Next double check that the cooling water jacket doesn't have any air trapped inside the motor.

V6 coolant refilling procedure
https://www.allfordmustangs.com/for...stang-irregular-rpms-showing-hot.html#2604913

Click to expand...

Yes to looks and tie downs. Forgot to mention it’s got a whole new cooling system also. I’ll look into the cooling water jacket though, thank you

 

0

03mustangv6wh

Member

Apr 5, 2019

8

1

13

Virginia Beach

Apr 10, 2019

#4

• Apr 10, 2019

• #4

Tried the MAF. Didn’t help. Also getting a new cold air intake this week. Also the crankshaft position sensor was changed recently.

 

0

03mustangv6wh

Member

Apr 5, 2019

8

1

13

Virginia Beach

Apr 10, 2019

#5

• Apr 10, 2019

• #5

For some reason my battery light will come on when I rev it to make sure it doesn’t shut off when it’s going through the rough idle

 

wmburns

SN Certified Technician

Aug 14, 2009

5,892

514

204

Houston Texas

Apr 10, 2019

#6

• Apr 10, 2019

• #6

03mustangv6wh said:

For some reason my battery light will come on when I rev it to make sure it doesn’t shut off when it’s going through the rough idle

Click to expand...

Always double check the charging system at the start of every trouble shooting session. Cut corners here at your own risk.

Howto perform charging system voltage drop test
https://www.stangnet.com/mustang-fo...perform-charging-system-voltage-drop-test.56/