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95 Ranger EGR problems

Tiny
J.STIEG
  • MEMBER
  • 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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Monday, April 4th, 2011 AT 10:07 PM

2 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,916 POSTS
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.
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Monday, April 4th, 2011 AT 10:53 PM
Tiny
J.STIEG
  • MEMBER
  • 352 POSTS
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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Tuesday, April 5th, 2011 AT 1:01 AM

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