Q: My car won't run when warmed up - 2008 Ford Mustang GT

asked by on November 06, 2016

I have a 08 Mustang GT, when its cold no issue .as it warms up it wont take gas, and idles real choppy in the 300-500 rpm range, I get no codes on anything, I have replaced the fuel pump,strainer and filter, fuel presser sensor,cleaned the MAF, and T/B, replaced the throttle position sensor,throttle motor does work when its not running, I have tried the stock tune still no difference,plugs have been replaced 850 miles ago, Its not the gas filled other car at same place 1/2 after later and its fine

Hi there. It looks like you have inspected most of the common culprits of a choppy running engine. However, when the vehicle gets hot and has running issues, it’s commonly caused by the EGR valve or EGR valve temperature solenoid. As the engine gets warm, the exhaust gas recirculation valve can get stuck, leading to a lean engine condition, which typically lowers the RPMs as you’ve indicated.

Check this component and clean it and see if that clears up your problems. If not, I recommend having a certified mechanic, such as one from YourMechanic, come to your location to inspect your choppy engine issue and find the source of the problem.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

My rear piston will not compress on my 2014 Ford Focus titanium

The rear calipers does not just screw in but requires to be pressed in at the same time it is being turned. If it still does not go in then you need to replace the caliper.

1997 ford f150 5.4L V8 4x4, rough idle, truck shakes, sometimes shuts off

Hello - the P0171 and P0174 are lean condition indicators for both sides (cylinder heads) of the engine. This problem could be caused by several problems: dirty or malfunctioning idle air control valve, dirty fuel injectors, air leak in the...

Trying to locate the Mass Air Flow sensor , and the Idle Air Control valve 2002 Ford Fiesta

Hello - Mass Air Flow meter is a short, cylindrical section of the air intake, just inside of the air filter housing, and just before a large cuved plastic-molded piece of the air intake. It has a flat electrical connector...

Related articles

The Best Used Cars to Buy If You're a Personal Trainer
As As a personal trainer, you either operate out of a gym, or you go to your clients. Either way, you probably don’t have to haul any more gear than what fits into your gym bag, so your main focus...
The Best Used Cars to Buy For a Graduation Gift
Your Your little bundle of joy has grown up and on the cusp of entering adulthood. Graduating is a milestone, and you want to reward their hard work and show how proud you are. Buying a used car is a...
The Best Used Cars to Buy If You're a Fisherman
What What do anglers look for, specifically, in their vehicles? Lots of room, plenty of cargo space, and sometimes, the ability to handle rough terrain. Some fishermen also want the option of towing a boat. With that in mind, we...