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Re: Uphill running rough and p0304 misfire Posted by Bernie [Email] (#1501) [Profile/Gallery] (more from Bernie) on Mon, 19 May 2014 19:22:43 In Reply to: Re: Uphill running rough and p0304 misfire, 03AeroCNY, Mon, 19 May 2014 08:06:27 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Hello, I am going to assume you have 03 aero. Since you were able to pull the code does the scanner you have show you any engine data? If so i would look at the long term fuel trim. If it is a larger positive number say over 10 I would definitely start by checking fuel pressure. If it is not or the fuel pressure is good then I would lean towards an ignition problem such as a dic. It is also possible that if could be a MAF but usually that gives you a P0300 random misfire first. Pulling a hill is going give you high boost which always seems to show up any weekness in the ignition system. Good Luck, Bernie at George Riggin Specialty Automotive
_______________________________________ George Riggin Specialty Automotive Current Saabs 1993 900 Turbo Conv. 1993 900 Turbo Conv. Auto 2003 9-3 Conv 2004 9-5 Arc Sedan 2005 9-3 SS 4 door 2005 9-3 SS Conv 2007 9-5 Aero Sedan 1986 900 Turbo Conv A few parts cars also
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