- Joined
- September 23, 2020
- Messages
- 1,541
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- Location
- United States
- City, State
- Alabama
- Year, Model & Trim Level
- 99 Explorer XLT 4.0 SOHC
Hello I have a 99 explorer 4.0 SOHC and it runs really rough when cold and at operating temperature i have changed the intake gaskets upper and lower egr tube o ring iac gasket egr gasket and the fuel filter along with the dpfe sensor i have also cleaned the iac and MAF the idle will go to 500RPM and then drop and almost stall and go to 1000RPM sometimes it will stall really need some help on this one not sure if its a vacuum leak or what's going on at this point i'm also getting codes p0171 p0174 using forscan