17 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHCode P0301
Leading reported evidence
Replace from a good hardware store
Suggestion or failed attempt
No successful repair reported for this finding.
0
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0
Unsuccessful attempts
1
Discussions
Read evidence and context
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Discussions that contain suggestions
1
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Suggestion
Easy enough to replace from a good hardware store.
Leading evidence: 'Replace from a good hardware store' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace from a good hardware store' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion · Original poster
I attempted to remove and replace the coil on cylinder 1 and had to accept that it was to tight of a space for me , I did not want to remove the muffler
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Suggestion · Original poster
so I had a local indy look at it - their computer pulled multiple cylinder misfire codes so they recommended replacing all of the coils.
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Suggestion
If you remove the mufflers as I did changing plugs and sleeves, you may have to break off the heads of the rusty bolts.
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Suggestion
and also, replace the whole lot when first in there.
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Suggestion · Original poster
I attempted to remove and replace the coil on cylinder 1 and had to accept that it was to tight of a space for me , I did not want to remove the muffler
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
17 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261027T140027Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
2000 c2 with 47K miles on it that i have been driving consistantly for the last 2 years -after a drive home in heavy rain i left it in the garage for about a week due to some really wet weather here is Seattle - - the car was running well when i parked it but today when I started it up it is running really lumpy and obviosly misfiring - flashing CEL Code p0301 - plugs are about 2 years and 20k old, coils are most likely origanals.
any thoughts would be welcome
I've switched coils on a 996 and a 997. Thin long, keyboard fingers are very handy when tackling this issue. and also, replace the whole lot when first in there. They will all go eventually.
You can make room by removing the mufflers. Coils should last more than 45000 miles. I have the originals and I am at 86000. I would only exchange the bad one if it is damaged in any way. They are an expensive item. But that's only my thoughts on the matter. I have the 1999 which has the sleeves around the plugs. It may just be a cracked sleeve and your coil could be ok. Sleeves are cheap but you would need a boat plug to remove the faulty one if yours has them. I don't know if a cracked one would cause a misfire which po301 indicates, but its worth checking that out before spending on coils. If you remove the mufflers as I did changing plugs and sleeves, you may have to break off the heads of the rusty bolts. I soaked mine overnight but they still broke as I attempted to remove the bolts. Easy enough to replace from a good hardware store. I would not attempt to run an engine which has a flashing CEL. Well not until I had found the problem.
^ add that to the possible cause, they're cheap like 11-15 bucks. I'd switch the coil pack first, if the other cylinder pulls a code it's prob the coil pack, if not, plug or s/p tube.
I attempted to remove and replace the coil on cylinder 1 and had to accept that it was to tight of a space for me , I did not want to remove the muffler
so I had a local indy look at it - their computer pulled multiple cylinder misfire codes so they recommended replacing all of the coils.
I agreed and they say the car is running perfectly now.
I will pick it up tonight and drive it myself to verify
Thanks Again for the help
If you've got one and the car is on it's original ones , you might be best off to do all 6
Warehouse 33 has a great price on them
http://www.warehouse33auto.com/parts...16/14/0/7060/0
Coils are a common issue, but with the car running fine and then poorly after sitting maybe an oil change is in order? The cam followers/lifters can bleed down due to contaminants thus causing compression issues for approximately 30 seconds until oil warms a bit.
If the coils are not cracked. do the JFP Resistance Test? 0.3-0.7 ohms @20 deg C betwn Term 15 & Term 1.
Spark Plug connector resistance spec is 2K ohms.
Thanks to JFP.
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