misfire 5 and 8
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I noticed your in NJ - I am as well - I'm sure you meant P0305 and P0308 - Well, the cyl 8 misfire is consistent even after switching out the coils based on what I read above. Those coils from Ebay... hmmm.. possibility some of those coils you purchased on the cheap might not be up to standard. The coils are very prone to mis-firing, especially if you have a center spark well gasket leaking oil into the spark well. The shaking between 45 - 55 is reminiscent of a mis-fire. I would ensure the connectors to the coils for cylinders 5 and 8 (driver's side bank - front and rear coil) are snug. You can pull a coil from another cylinder (not 5 or 8) and swap it in the place of 5 or 8 - if your get a P030X for the coil you switched out then it is a safe bet that coil is bad and a new coil or 2 would be in order. Hope this helps.
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JagV8 is 100% right - do not let your mechanic fiddle with the computer - I would pull the coils in cyl 5 & 8 - do they have any oil on them? - If you find your coils are the issue replace them with quality units and yes, fixing the cam gaskets, including spark well seals is a great idea as well.
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I drove my 00 S type with V8 with a bad coil - cyl #4 for a while unknowingly - I experienced the same shudder between 45 - 55mph - I would suggest getting to the root cause of the misfire and not just drive it. Engine misfiring can cause havoc with your cat converter. I would lean towards it being a coil issue, especially since those coils you purchased came off of Ebay. normal amount expected for a set of 8 coils is between $225 - $300 - check the forum sponsers out.
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Hope you get it fixed! I think you are on the correct path.
Your car has the old style cam chain tensioners that will wear out and fail. This can destroy the engine. Any idea if they have been changed??
After you get the mis-fires repaired please take a look at the secondary tensioners because you can see these when the cam cover is removed. The plastic will most likely be cracked if not completely split.
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Your car has the old style cam chain tensioners that will wear out and fail. This can destroy the engine. Any idea if they have been changed??
After you get the mis-fires repaired please take a look at the secondary tensioners because you can see these when the cam cover is removed. The plastic will most likely be cracked if not completely split.
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beluve, it would REALLY help if you would put vehicle specs in your signature ie...year, engine etc.... Look in the upper left hand corner o\f any site page, "User CP" then "Edit Signature" really easy thing to do.
That way the guys here don't have to search around to find that information out!
Help us help you.
That way the guys here don't have to search around to find that information out!
Help us help you.
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beluve, it would REALLY help if you would put vehicle specs in your signature ie...year, engine etc.... Look in the upper left hand corner o\f any site page, "User CP" then "Edit Signature" really easy thing to do.
That way the guys here don't have to search around to find that information out!
Help us help you.
That way the guys here don't have to search around to find that information out!
Help us help you.
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