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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

code readout

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Old Nov 15, 2002 | 02:37 PM
  #1  
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cookieman
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code readout

I have an 89 f150 with 5.8 and have had rough idle for some time. Went to Autozone and had code read , came back 34 what should I look for?

 
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Old Nov 15, 2002 | 03:48 PM
  #2  
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bourbon
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From: Champlin USA
code readout

[updated:LAST EDITED ON 15-Nov-02 AT 04:54 PM (EST)]well here's what my book says for code 34 considering you have an EEC4 computer:

EGR Valve Position (EVP) sensor or Pressure Feedback EGR (PFE) sensor: signal voltage out of Self-Test specification limits,
or,
signal voltage above closed limit during normal engine run operation,
or,
signal indicates insufficient EGR flow

hope that helps!


i also have an 89 F150 with the 5.8L. it didnt idle right before i rebuilt it and it still doesnt after. its not a smooth idle by any means, prob why both motor mounts were cracked through. i long for the days without computers controlling things for us!!! prob a bad design on Fords part
 
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Old Nov 15, 2002 | 06:18 PM
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code readout

 
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