1999 Lincoln Navigator Q&A
1999 Lincoln Navigator Question: Hesitant start, rough idle
You most likely have a Power Train Computer system problem with a fault code to help you diagnoses the issue. http://repairpal.com/check-engine-light This is the first place to start, check your codes and then go from there. - dandd
The check engine light isn't on regarding the hesitant start/ rough idle. My brother in law doesn't burn premium gas and I know this vehicle requires it. Could this cause an injector or feul system...