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Another 2001 4.0 P0306 issue

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Old Nov 3, 2010 | 09:55 AM
  #31  
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compression listed in 1st post... have not repeated with #6 wet compression test yet, will do later today... rgr on the oil change... wanted to make sure the journals were cleaned a bit before the upcoming oil change... it almost seemed to run better (slightly smoother) after the seafoam. The only other thing that bothers me is there is no noticeable change in idle when disconnecting the #6 fuel injector connector. All the others cause a noticeable miss. A light bulb in #6 connector shows good cycling. Swapping #5 & #6 fuel injectors does not move the original misfire from 6 to 5.
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Old Nov 3, 2010 | 09:58 AM
  #32  
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well, 155psi compression is actually good. if it were getting wet, it would have better compression. that tells me that you need to consider actually just replacing that injector.
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Old Nov 3, 2010 | 10:31 AM
  #33  
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you need to put the new MAP sensor in and let it run. When i did mine they weren't the same length and it needed time to run and self-adjust...but i cant remember if it was the MAP sensor or the MAF..on the intake...are they the same thing?
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Old Nov 3, 2010 | 05:20 PM
  #34  
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Originally Posted by red97cherokeewithsunroof
you need to put the new MAP sensor in and let it run. When i did mine they weren't the same length and it needed time to run and self-adjust...but i cant remember if it was the MAP sensor or the MAF..on the intake...are they the same thing?
Should be a MAP... did it run rough while it was learning?
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Old Nov 3, 2010 | 05:23 PM
  #35  
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currently showing these along with the new misfires... (one of the latest things we changed was the crankshaft position sensor)...

P1391 (M) Intermittent Loss of CMP or CKP Loss of the Cam Position Sensor or Crank Position sensor has occurred. For PL 2.0L

P0352 (M) Ignition Coil # 2 Primary Circuit Peak primary circuit current not achieved with maximum dwell time.

I guess it's time to put the old one back on?
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Old Nov 3, 2010 | 08:04 PM
  #36  
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ok, putting the old Crankshaft Position Sensor back on made everything back to normal. Normal being that only the P0306 misfire code is the only code.
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Old Nov 5, 2010 | 06:40 AM
  #37  
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6 new Bosch fuel injectors and 6 new fuel injector connectors are on the way.
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Old Nov 10, 2010 | 02:54 PM
  #38  
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6 new injectors and 6 new connectors... still have P0306...
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Old Nov 10, 2010 | 04:36 PM
  #39  
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pull the valve cover and look for a crack between the cylinders
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Old Nov 10, 2010 | 05:12 PM
  #40  
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What a nightmare.. I feel for you.. You got Brand New 784's? How much did you pay for them or are they rebuilt?
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Old Nov 11, 2010 | 05:36 AM
  #41  
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Originally Posted by buysellny
What a nightmare.. I feel for you.. You got Brand New 784's? How much did you pay for them or are they rebuilt?
Got 6 rebuilts for a good price ($119) from PAI:

w ww.precisionautoinjectors.com/category.sc;jsessionid=3AA985B6B510EC29B9F761389D5 713AB.qscstrfrnt02?categoryId=3

The engine does run quite a bit smoother, but we still have the misfire... starting to look like we need to start looking back at the valves and head problems.

Last edited by membrain; Nov 11, 2010 at 05:39 AM.
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Old Nov 11, 2010 | 07:04 AM
  #42  
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Those are green? 784's are black yes? I called or emailed these guys they would not give me a part number.. You got black not green ones?
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Old Nov 11, 2010 | 07:49 AM
  #43  
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green ones .
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Old Nov 12, 2010 | 10:45 AM
  #44  
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Originally Posted by membrain
green ones .
Green 784's? You got 789 I think which a bit diffrent? Now Im really confused..
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Old Nov 15, 2010 | 09:39 AM
  #45  
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I don't know which number the injectors are, but they work ok I suppose...
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