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Engine hesitates at startup - P0300 & P0301 codes S70

uid 1839's pic
posted by  Brian M. on  Sat Mar 31 00:00 CST 2012
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last visit: Fri Sep 5 08:08 CST 2014
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Interesting how I try to take good care of my cars and the more problems seem to popup. Had the 90k/95 service done on my 1998 GLT last Dec. 2011. In January 2012, engine would die after running for a minute or two -- fuel pump replaced. Noticed rough start and whine (or hissing) noise -- replaced fuel pump a 2nd time. In February 2012, noticed I needed to top of engine oil and then top it off again in March 2012 -- about 1.2 lit total. No oil spots on garage floor. Today I found oil in the engine bay (please see separate thread 'Found Oil in Engine Bay).

This morning the car started to run rough for about a minute and things were fine again. This happened twice last month but the car seemed fine after that. When I started the car this afternoon it started to shake/shudder again like the engine would die -- and then I got a CEL -- two codes: P0300 and P0301. I am not that mechanically inclined so kindly explain what could possible be wrong.
--
Brian M. - 1998 S70GLT, 1998 S70 GTA








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    ANSWER Engine hesitates at startup - P0300 & P0301 codes S70

    posted by  someone claiming to be 240850 on  Sat Mar 31 06:44 CST 2012 [RELATED]

    These pages will give you general symptons, causes, and possible solutions.

    http://www.obd-codes.com/p0300

    http://www.obd-codes.com/p0301

    This post has been marked as an answer to the original question.



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      Engine hesitates at startup - P0300 & P0301 codes S70

      uid 1839's pic
      posted by  Brian M. on  Sat Mar 31 08:22 CST 2012
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      last visit: Fri Sep 5 08:08 CST 2014
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      Thank you!!
      --
      Brian M. - 1998 S70GLT, 1998 S70 GTA








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        Engine hesitates at startup - P0300 & P0301 codes S70

        posted by  someone claiming to be 240850 on  Sat Mar 31 08:45 CST 2012 [RELATED]

        Sure thing! Save that web site's home page it has come in handy several times.
        Some will say it is not Volvo specific, but it general enough for the many vehicle makes I have worked on. Good luck.







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