I just bought my f250 a couple months ago. Last week after it has been running great, I started it and I will only drive at idle speed. If I press the accelerator the check engine light comes on and it will only drive at idle speed. Any suggestions

 

I can't help you there. If you have a 7.3, IDI or powerstroke, try asking your question with a little more detail in one of those threads. There is also a lot of activity in the 9th gen thread also, that you may have some luck in.