1999 Explorer 4.0 OHV Trouble Shooting | Ford Explorer Forums - Serious Explorations

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1999 Explorer 4.0 OHV Trouble Shooting

Lacrossland

New Member
Joined
March 18, 2017
Messages
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City, State
New Mexico
Year, Model & Trim Level
1999 explorer xlt 4x4
I know this question has been asked a lot but I need help. I bought this exploder and it has a hard start situation most of the time and check engine light with the infamous lean bank 1 and 2. The hard starting is random, sometimes it will start right up after sitting overnight. Temperature doesn't seem to effect starts either. Also sometimes it takes 2-3 seconds and other times in takes almost 10 seconds. Turning the key on and off a couple of times doesn't effect the hard start. I've replaced spark plugs and wires, mass airflow, fuel pump, fuel regulator, fuel filter, and cleaned the EGR valve. I have also ran sea foam through it to clean the injectors. I have also sprayed starting fluid on every vacuum line so I don't think it's a vacuum leak.
 






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