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SN95 Cobras
Help please! P0340 code; common problems have been ruled out!
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<blockquote data-quote="iamtheshaner" data-source="post: 14153759" data-attributes="member: 157055"><p>After more thought I don't know how a machine shop could screw up sprocket phasing and/or intake and exhaust phasing. Regardless, the best advice is, unfortunately, to reset and check thrice your base valve timing. The comment I made about your ignition coil was directed at a COP system which I suppose you probably don't have with a 96. Even more the reason why it runs like garbage when the PCM fires your injectors in pairs or by bank. I just don't see it being a PCM or CMP circuitry issue because sequential fuel delivery and misfire monitor is basically all that input is used for. So if it runs better when the PCM fires them in groups it says to me that the specific timing is off which must mean the valve timing is off because there is no way the crank trigger wheel is off or wobbling because it would run crappy all the time if at all</p></blockquote><p></p>
[QUOTE="iamtheshaner, post: 14153759, member: 157055"] After more thought I don't know how a machine shop could screw up sprocket phasing and/or intake and exhaust phasing. Regardless, the best advice is, unfortunately, to reset and check thrice your base valve timing. The comment I made about your ignition coil was directed at a COP system which I suppose you probably don't have with a 96. Even more the reason why it runs like garbage when the PCM fires your injectors in pairs or by bank. I just don't see it being a PCM or CMP circuitry issue because sequential fuel delivery and misfire monitor is basically all that input is used for. So if it runs better when the PCM fires them in groups it says to me that the specific timing is off which must mean the valve timing is off because there is no way the crank trigger wheel is off or wobbling because it would run crappy all the time if at all [/QUOTE]
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Help please! P0340 code; common problems have been ruled out!
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