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Summer gas?
Posted by Ron F [Email] (more from Ron F) on Fri, 24 May 2013 16:37:07
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For the last few years, every summer from about May to September, my car (04 Aero wagon, 132k) starts throwing codes and misfiring at highway speeds. From October to May no issues, pulls strong, runs great, etc. NOt temperature related since sometimes will act up when cold, hot, etc during the summer, but doesn't matter the rest of the year. No starting issues otherwise. Doesn't act up at low speeds, only on the highway when accelerating past 65 or 70. Only thing I can think of is summer formulation gas is somehow affecting performance under load.
For example, car ran great all winter and spring and all last week - hot and humid here in MA, no issues at all. Filled up yesterday, and today had misfire/bucking on highway. Over the last 2 years have replaced the CPS twice, upstream 02 sensor (p0134), spliced J16 (actually jumpered at connection underhood),replaced plugs with correct NGK, etc but no matter what I do, summer problem remains and I get all frustrated until September when it goes away.
Any ideas?
Thanks
Ron
posted by 24.218.155...
Posts in this Thread:
- Summer gas?, Ron F, Fri, 24 May 2013 16:37:07 <-- Viewing This Message
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