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EGR not working?

Tiny
ERERERT
  • MEMBER
  • 1994 FORD RANGER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 200,228 MILES
1994 FORD RANGER. CODE 332 INSUFFICIENT EGR FLOW DETECTED SHOWING ON MY SCANNER (AUTO X-RAY 6000), ENGINE STARTS FINE, WHEN WARMING STARTS TO STALL AND SURGES, WHEN UP TO TEMP, RUNS WELL BUT LIGHT COMES ON. MANIFOLD VAC@16lb, EGR WORKING, INTAKE PORTS CLEAN (LITTLE WET), NEW EGR VAC SOLENIOD, NEW BACK PRESSURE SENSOR, NEW IAC, NEW COMPUTER, VAC LINES GOOD. DON'T KNOW WHERE ELSE TO LOOK
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Tuesday, October 26th, 2010 AT 3:06 PM

10 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
If you have already replaced the backpressure sensor, then you likely have a plugged passage in the throttle body. It has narrow spots that will plug up with carbon.
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Tuesday, October 26th, 2010 AT 3:16 PM
Tiny
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  • 11 POSTS
I REMOVED THE EGR VALVE AND AIRDUCT, AND CLEANED OUT PORT TO PLENUM, IT APPEARED TO BE CLEAN, EXAUST TUBE TO MANIFOLD OPEN
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Tuesday, October 26th, 2010 AT 3:39 PM
Tiny
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  • MECHANIC
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With the engine idling, apply vacuum to the EGR valve and see if the engine tries to stall. If not, the passage is still plugged.
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Tuesday, October 26th, 2010 AT 3:47 PM
Tiny
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ONE OF THE FIRST THINGS I TRIED, ENGINE STALLS
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Tuesday, October 26th, 2010 AT 4:04 PM
Tiny
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  • MECHANIC
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Does the EGR hold vacuum when applied?
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+1
Tuesday, October 26th, 2010 AT 4:26 PM
Tiny
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  • MEMBER
  • 11 POSTS
EGR DOSE HOLD VAC, CHECKED CONTINUITY BETWEEN EGR VAC SOLENIOD AND COMPUTER, ALL IS GOOD, NOT SURE WHEN VAC IS APPLY'D? I KNOW ITS NOT CONSTANT
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Tuesday, October 26th, 2010 AT 4:43 PM
Tiny
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  • MECHANIC
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You may have a defective DPFE. They have a very high failure rate. You'll need a scan tool to see what it's doing.
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Tuesday, October 26th, 2010 AT 5:11 PM
Tiny
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I CAN UNDERSTAND A NEW PRODUCT BEING DEFECTIVE, BUT WHAT ARE THE ODDS OF A NEW DPFE UNIT BEING BAD?
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Tuesday, October 26th, 2010 AT 5:40 PM
Tiny
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  • MECHANIC
  • 20,761 POSTS
Probably about 25%.
I'm not suggesting to change it. You just need to test it.
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Tuesday, October 26th, 2010 AT 6:12 PM
Tiny
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THANKS, I'LL TRY TO TEST THOROUGHLY TOMORROW.
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Tuesday, October 26th, 2010 AT 6:59 PM

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