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Miscellaneous Automotive
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Engine Roughness
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<blockquote data-quote="r1dermon" data-source="post: 1200600" data-attributes="member: 563650"><p>ok, if you trace your wires from your spark plugs back to your distributor cap, in the center of the distributor cap will be a coil wire, its a lone wire, not connecting to any spark plug, rather, it goes off in its own direction, trace this wire and you'll fine your coil. if your coil is arcing along a piece of metal or something, it will lose a lot of spark power, which is why it would run ratty at lower rpms. when it discharges, it will emit a noticeable spark. so turn your car on at night, keep it in park, and open your hood, make sure its good and dark, if you notice any blue sparking coming from the coil, then you've got a problem. if not...then it must not be ignition related. how old is the gas and how many tanks has it been performing like this for? if less than one, go to an auto store and get some dry-gas and pour it into your tank, just in-case there's water in there. the transmission sounds serious if you already had it flushed...i'd try it again though...how many miles are on it and how hard do you drive it? if you beat on it, eventually the bands which actually convert the engine power could be worn out. it sounds like low hydraulic pressure though...fuel injectors are directly off of your fuel rails...they might be under your manifold, so it could be difficult to get to them...anyway, you can find them by tracing either the gas lines under the manifold, or tracing 6 sets of wires(assuming its 1 injector per cylinder and 6-cylinders) under the manifold. they'll connect with square connectors and they all are connected to fuel lines. testing the injector is as easy as running your car so it runs like crap for a few minutes, and then pulling the spark plugs. look at the spark plugs and determine if one or two have been misfiring. do this by looking for blackened terminals on them or a lot of soot. regularly firing plugs should be fairly dry. if any oil is on them...bad sign.</p></blockquote><p></p>
[QUOTE="r1dermon, post: 1200600, member: 563650"] ok, if you trace your wires from your spark plugs back to your distributor cap, in the center of the distributor cap will be a coil wire, its a lone wire, not connecting to any spark plug, rather, it goes off in its own direction, trace this wire and you'll fine your coil. if your coil is arcing along a piece of metal or something, it will lose a lot of spark power, which is why it would run ratty at lower rpms. when it discharges, it will emit a noticeable spark. so turn your car on at night, keep it in park, and open your hood, make sure its good and dark, if you notice any blue sparking coming from the coil, then you've got a problem. if not...then it must not be ignition related. how old is the gas and how many tanks has it been performing like this for? if less than one, go to an auto store and get some dry-gas and pour it into your tank, just in-case there's water in there. the transmission sounds serious if you already had it flushed...i'd try it again though...how many miles are on it and how hard do you drive it? if you beat on it, eventually the bands which actually convert the engine power could be worn out. it sounds like low hydraulic pressure though...fuel injectors are directly off of your fuel rails...they might be under your manifold, so it could be difficult to get to them...anyway, you can find them by tracing either the gas lines under the manifold, or tracing 6 sets of wires(assuming its 1 injector per cylinder and 6-cylinders) under the manifold. they'll connect with square connectors and they all are connected to fuel lines. testing the injector is as easy as running your car so it runs like crap for a few minutes, and then pulling the spark plugs. look at the spark plugs and determine if one or two have been misfiring. do this by looking for blackened terminals on them or a lot of soot. regularly firing plugs should be fairly dry. if any oil is on them...bad sign. [/QUOTE]
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