Re: 308 QV emissions failure and possible misfire | <– Date –> <– Thread –> |
From: Alexander Ishii (alexishii![]() |
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Date: Thu, 23 Dec 2010 10:14:25 -0800 (PST) |
Hi Phil, > In fear of offending some one, who is your mechanic, maybe that is > where the problem is? Oh, no doubt... :) I'm actually a little miffed, and plan to fix this myself, just for the satisfaction of demonstrating to them that they are goofs... :) > Fire when ready, I have donned my flame proof shorts. My flame proof shorts have never been that effective, so I'm not willing to publicly invite flaming. Anyone who really is interested, is welcome to drop me a private note, and I'll be happy to inform. Cheers, Alex > On Dec 23, 2010, at 10:58 AM, Alexander Ishii wrote: > >> >> Hi All, >> >> So my 84 QV has been stubbornly failing emissions (in NJ), and after >> some >> repeated assertions by my usual mechanic that "all seems to be well", >> I've >> found myself having to try and figure out the problem myself. >> >> At the moment, the car is not idling right in my mind (despite what my >> mechanic says). For one, the idle speeds "hunts" a bit; not enough to >> be >> seen on the tach, but enough to be felt as a slight change in the >> vibration >> frequency of the engine. Second, every couple of seconds one gets a >> just-audible muffled "pop" sound from the engine, accompanied by a >> slight >> puff of extra exhaust out of the tail pipes (no sound out of the air >> intake >> system). Also, the car is running sort of on the hot side (coolant >> temp >> "idles" at 195). >> >> Plugs and wires were changed not long ago, but other than that, >> nothing much >> has required much tinkering in many years. >> >> The "pop" has me thinking than one-or-more of the cylinders is >> intermittently misfiring and dumping some un-burnt fuel into the >> exhaust >> manifold (where it is igniting and "popping"). Given the "every >> couple of >> seconds" nature of the problem, however, I have little doubt that all >> the >> sparks will look fine when I try the usual tests. Anyone have any >> suggestions for how I might try and zero-in on the faulty system >> (short of >> swapping-out every part one-by-one until the issue goes away)? >> >> Also, it has also occurred to me that the problem might be that the >> injectors are not atomizing properly, and leading to an complete burn >> (in >> turn leading to exhaust manifold ignition of the leftover fuel). Has >> anyone >> seen symptoms like the above be remedied with replacement of the >> injectors? >> >> All thoughts/opinions/experiences would be appreciatively accepted. >> >> Cheers, >> Alex >> >> >> _________________________________________________________________ >> To unsubscribe or modify your subscription options, please visit: >> http://lists.ferrarilist.com/mailman/options/ferrari/ >> philville%40dejazzd.com >> >> Sponsored by BooyahMedia.com >> and F1 Headlines >> http://www.F1Headlines.com/ >> >> > For information about the Concours d'Elegance at Radnor Hunt go to > www.radnorconcours.org > > Philip A Tegtmeier > 610.525.8949 > www.philvilleUSA.com >
- Re: 308 QV emissions failure and possible misfire, (continued)
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Re: 308 QV emissions failure and possible misfire l02turner, December 23 2010
- Re: 308 QV emissions failure and possible misfire Alexander Ishii, December 23 2010
- Re: 308 QV emissions failure and possible misfire Gary Reed, December 23 2010
- Re: 308 QV emissions failure and possible misfire Alexander Ishii, December 23 2010
- Re: 308 QV emissions failure and possible misfire Alexander Ishii, December 23 2010
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Re: 308 QV emissions failure and possible misfire l02turner, December 23 2010
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