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97 Olds 88 3.8 misfire

Old Oct 21, 2018 | 12:59 AM
  #11  
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Originally Posted by stopngo
Code Numbers are P0131 and P0300
P0300=Random misfire
P0131=O2 sensor circuit low bank 1 sensor 1

P0300 confirms random misfire without a specific cylinder having more misfires than the others

P0131 identifies that the front oxygen sensor/wiring/etc. is returning low voltage

I think the P0131 isn't very important to diagnosing your reliability issue, but will help with emissions/economy/etc. later when we figure out what'* causing the power loss etc.

For now let'* keep going with what we're looking for above.
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Old Oct 21, 2018 | 09:44 AM
  #12  
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Originally Posted by stopngo
Yes and I appreciate the questions and I will most certainly find out the fuel pressure ASAP.
Thanks for the questions. The answer is coming.
Check fuel pressure as it could be a pump on its way out. Do you have access to a scanner that reads live data like fuel trim?
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Old Oct 21, 2018 | 11:17 AM
  #13  
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I do not have access to a live data scanner as above. I have an appointment at a shop for Monday and I will ask them to start with the fuel pressure test.
If Fuel pump is confirmed good then will go after other things. As I said all 6 coil terminals do spark on a static test but don't know what might take place intermittently.
I have had a coil failure on another vehicle but the current situation is very different in that it is more of an all across the board petering out (no backfire) as opposed to the abrupt hiccup and backfiring with the coil failure.

Question:......Is there a simpler way to test the fuel pump at home rather than pay for diagnosis?
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Old Oct 22, 2018 | 01:45 PM
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Sure there is......Places like AutoZone have tool programs, where you pay for the tool, take it home and use it, and then return it and get your money back....of you could just buy a fuel pressure gauge....they are not expensive....certainly cheaper than paying a tech to check it....
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Old Oct 22, 2018 | 02:10 PM
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Us Canucks are under privileged in regards to autozone and tool programs. They don't exist. Thought of buying one but then thought if it wasn't the fuel pump I would be back to the Tech and have a $60.00 tool that I will likely never use again.

Just got the verdict. Fuel Pump is Done. Diagnosis complete. A big thanks to Y'ALL.
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Old Oct 23, 2018 | 05:53 PM
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Originally Posted by stopngo
Us Canucks are under privileged in regards to autozone and tool programs. They don't exist. Thought of buying one but then thought if it wasn't the fuel pump I would be back to the Tech and have a $60.00 tool that I will likely never use again.

Just got the verdict. Fuel Pump is Done. Diagnosis complete. A big thanks to Y'ALL.
Thanks for letting us know how it turned out!
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