Question about 2004 Ford Mustang GT

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Mustang gt skips until warmed up

When I get in my mustang and start off it started skipping, but once it warms up the skipping stops any suggestions

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  • Contributor
  • 38 Answers

May be the heated oxygen sensors or the mass air flow sensor

Posted on Nov 22, 2013

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6 Suggested Answers

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Posted on Jan 02, 2017

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  • 9 Answers

SOURCE: 2003 Mustang engine skipping when accelerating

Does it idle fine? Sounds like a vacuum leak.

Posted on Apr 26, 2009

MNfisherman
  • 11896 Answers

SOURCE: 2006 Ford F150 XLT 5.4 Engine has a hard time

I would check the flywheel for missing teeth or looseness. Also check starter itself.

Posted on Nov 13, 2009

sscullys
  • 984 Answers

SOURCE: has a little miss or skip after it warm up 5.4

Check the MAFS ( Mass Airflow Sensor ) in the air filter housing for dirt in it. You can get MAFS cleaner at the auto store, don't use normal Throttle body cleaner / carb/chock cleaner on it.
It is in the housing, is a metal tower standing up when you look in the housing.
375dfc5.jpg
Also check the IAT ( Intake Air sensor ) to make sure it is clean. This is mounted to the left ( towards the throttle body ) of the air filter, should be pointing back or down.

When you reassemble the intake, make sure it is put together tight. Un-metered air should have set a CEL, but it might be boarder line to causing a problem.

If this is not it, next take the plastic cover off the throttle body, and check the vac line & rubber elbow on the back of the intake, and the line for cracks. This, if damaged, should cause a CEL ( lean indicators ).
Last while you have the MAFS cleaner, remove the IAC ( Idle Air Controller ) on the back of the throttle body and clean it. This can cause a stumble / erratic RPMs at idle ( has nothing to do with throttle usage ).
c52225b.jpg

The MAFS and the IAT would be the best places to start.

Posted on Nov 25, 2009

SOURCE: 2004 F350 6.0L starts rough and runs rough until

What tells me, is that the thermostat is staying open after
your done using the truck
When you start it up cold, it takes longer to warm up the area
near the coolant temp sensor,which is part of the system
to put the PCM (computer) into closed loop
Closed loop is when you leave a computer fuel stratagy and
the O2 Sensors take over fuel control

Hard to start----

Need spark plugs that have not been in the motor over 60,000 miles
Spray the throttle plate with CRC Throttle Cleaner
Spray the MAF Sensor with CRC MAF Cleaner
Need all ducting in place,no vacuum leaks and a clean air filter
Make sure your O2 Sensors are tight
A fuel filter not over 3 years old
Hope the coolant temp sensors works correctly

Anything more gets too technical

Posted on Dec 02, 2010

johnjohn2
  • 5763 Answers

SOURCE: Hello, Please help! My 1996

use the key to lock and then unlock the drivers door then try to start if it still doesnt start then go to pass/side door and lock and unlock it and then try to start the switch on the drivers door may be bad, if this is a factory alarm system, if its aftermarket then you will need to locate the reset button under the dash, this will be a small red push type button, you will have to turn key on and push button in four times quickly, also are you sure its the alarm? it may be a bad battery or starter but start with the directions i gave first and let me know if it doesnt work make sure to relist the problem. good luck.

Posted on Jan 20, 2011

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