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P0301 cant find problem

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Old Dec 27, 2019 | 08:02 PM
  #21  
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When looking at the ignition you should look at the secondary along with primary current. The transducer trace is of little value as is. You need to capture the actual firing event in the cylinder NOT with a tester.

Last edited by carfixer007; Dec 27, 2019 at 08:06 PM.
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Old Dec 27, 2019 | 09:10 PM
  #22  
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Was just wanting to see if the firing event was happening at the same time on both cylinders

Here is one in cylinder
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Old Dec 28, 2019 | 12:24 PM
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Originally Posted by Wayne270th
Was just wanting to see if the firing event was happening at the same time on both cylinders

Here is one in cylinder
I don't know what you mean by "happening at the same time".
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Old Dec 28, 2019 | 02:52 PM
  #24  
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If the spark event is happing at the same degree of crank rotation on 1 as it is on 5 since I have no miss on 5 and it looks to be the same.
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Old Dec 28, 2019 | 04:51 PM
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Not sure seen two different videos on how to do a running compression test with the gauge. One says to remove the shrader valve from the gauge the other says not too and to record psi at idle and then do a snap throttle and record that pressure I'm at a loss on this so if some could explain it I would appreciate your help. Also saw a video on the relearn crank position sensor I don't have a scan tool with that capability I have a son in law who has one from snap on that probably would but getting him to do it may take a while.
I need to try again to see my primary ignition amp draw and voltage but I tried it once and couldn't make sense of it on the scope I was tapped in to the voltage wire feeding the ICM with the scope that seemed to be the only place to try to get a reading for that.
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Old Jan 1, 2020 | 01:59 PM
  #26  
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# 5 running idle engine fully warmed to 190 degrees

#1 at running idle engine warm but not fully warm not sure of temp yeah i know need go back and do #1 at same temp

#5 running after a few thottle snaps

#1 after a few thottel snaps

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Old Jan 1, 2020 | 03:52 PM
  #27  
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#1 running with one quick throttle snap

#5 running with one quick thottle snap
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Old Jan 1, 2020 | 04:49 PM
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After engine warmed up fully i picked up another 5 psi on #1 running idle
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Old Jan 1, 2020 | 05:19 PM
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After engine warmed up fully i picked up another 5 psi on #1 running idle

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Old Jan 1, 2020 | 05:31 PM
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Also tested both 1 and 5 for its pressure on its "1st gulp" both were right at 125 psi at full thottle cranking in clear flood mode tried it several times on both cylinders I feel this is it'* true reading from a full stroke I say this because I got several readings from both cylinders like 75 100 but I dont think they were full strokes you have to catch it just at the right time otherwise you only get a particular fill of the cylinder
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