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
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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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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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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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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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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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
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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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