Rough idle
I have a 97 ranger 2.3L that I'm trying to figure out what's going on. When I first start the engine, it will idle fine but will run rough for about the first 3 minutes and has even stalled in that time. My scan tool had code P0401 (insufficient egr flow.) I replaced the DPFE sensor which cleared the code. But still the same symptoms. I replaced the IAC valve, egr solenoid, plugs and plug wires. Would running mid-grade fuel help? Any suggestions would be greatly appreciated. Thanks in advance.
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1997 ranger xlt 2.3L 2wd
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