Mechanics

95 EGR PROBLEMS

1995 Ford Ranger • 130,000 miles


I am working on a 95 ford ranger and I got code P0401 (Exhaust Gas Recirculation Flow Insufficient Detected) checked vacuum going to the egr valve with the engine running and there was not any. I replaced the vacuum solenoid and still no change. There is power going to the vacuum solenoid with engine running. Got any ideas on how to troubleshoot?
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J.stieg
April 4, 2011.




You don't want any EGR at idle when you're standing in front of the truck. That would cause a severe misfire. I would sooner suspect the passages taking the exhaust to the cylinders are plugged with carbon.

Caradiodoc
Apr 4, 2011.
Ok thanks, I forgot that it is closed at idle. I should do a road test next to see if it is responding and getting vacuum to actual EGR valve. I'm sure somethings plugged like you said. I will pull the tube off and and clean all passages.
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Tiny
J.stieg
Apr 5, 2011.

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