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check engine light, but no code!!!

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Old Apr 23, 2005 | 04:28 PM
  #1  
Budkole's Avatar
Budkole
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check engine light, but no code!!!

2 days ago my check engine light came on while driving but went back off while still driving. The engine lost almost all of its power till i hit the gas. Today i was able to get the codes run. All the thing said was "passed"
-no codes
what gives?

95 f350 psd, no chips, straight piped.

btw, i just got it straight piped three days ago, i wonder if that is affecting something
 
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Old Apr 23, 2005 | 09:59 PM
  #2  
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1997F-350
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From: SHELTON, WA
probably not a good code reader. what i mean is not just any old obd2 scanner will work on our trucks. actron 9140 works and there are also some coputer based ones that work also. go to a few parts stores and ask to use there scanner. keep going to different places until you find one that works.
 
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Old Apr 23, 2005 | 10:06 PM
  #3  
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barebackjake
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From: STEPHENVILLE,TX!!!!!
did the tach drop all the way down or do abnormal things when it did this...thats what my 94 did when the CPS went out.
 
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Old Apr 24, 2005 | 07:45 AM
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yes the tach did drop, but when i put my foot on the gas it moved up.
 
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Old Apr 24, 2005 | 09:40 AM
  #5  
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From: STEPHENVILLE,TX!!!!!
hmmm got me stumped on this one, seems like it defueled over something. seems like it lost the injection pressure sensor for a second threw a CEL and the signal came back and all was good.

with the light coming on and going back off without turning the ignition off and back on i dont think its gonna store the code.

i would check your connections under the hood, clean battery terminals, check your ipr and ips connections and your valve cover connections, seems like an intermitten electrical issue to me.
 
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Old Apr 24, 2005 | 09:47 AM
  #6  
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thanks for the info, but im kinda new to diesels so what and where are the ipr, ips and valve cover connections?
 
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