20 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHCoil packs- any real difference between brands? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Leading reported evidence
Replace #6
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Coil packs- any real difference between brands? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Read full discussion summary
Leading evidence: 'Replace #6' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check resistance' (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.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
I replaced my coil packs prevently, because 2 of 6 had really bad cracks and 3 had worn insulators.
Coil packs- any real difference between brands? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace the-coils.html
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Coil packs- any real difference between brands? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Test via resistance
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
A coil pack can be tested via resistance using a multimeter.
Coil packs- any real difference between brands? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Use beru coil packs
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
I used Beru coil packs on my Boxster and 996 and they worked great.
Coil packs- any real difference between brands? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Disconnect plug ht coil pack
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
I certainly wouldn't disconnect a plug HT coil pack with the engine running - especially one that's bolted onto the cylinder head and me on my back under it.
Coil packs- any real difference between brands? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Inspect insulation of his coil packs is
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
The reason I advised Toplad to inspect the insulation of his coil packs is because he lives in the north of England where the atrocious weather patterns can quickly turn a small crack into a misfire.
Coil packs- any real difference between brands? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Coverage and how to read this overview
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.
20 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261027T003124Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Looks like I need to replace some of my coil packs
In searching, I have fond them from $40 to $80
Any real difference between brands?
Not trying to be super cheap, just don't like to leave $$ on the table
Then I would do some further diagnosis before spending money on new coil packs. Unless you are sure that is the problem. You could always get some nice used ones from Woody. He will probably sell you six for the price of one new one.
A coil pack can be tested via resistance using a multimeter. However, most people just drive them until they get a misfire and then replace them along with the spark plugs.
1) Inspect (very) closely under a good light source the coil pack's insulation for cracks - sometimes they can be hairline and difficult to see.
2) If in doubt, connect an ohmmeter across pins 1 & 3 and check resistance. They should be 0.3 - 0.7 ohms @ 20 deg. C. Anything out of this band should be replaced.
Hi
i'm not shure if a coil pack is bad if the housing has cracks. I replaced my coil packs prevently, because 2 of 6 had really bad cracks and 3 had worn insulators. Didn't have had any misfire or DTC. Have to say that i never drove my Box in rain.
Used BERU coil packs, because the OEM ones are also BERU. My OEM part number was 996 602 102 00. BERU number on the OEM ones was 0 040 100 021. BERU part number had changed to 0040.100.036 ZS 036
Regards
Markus
The reason I advised Toplad to inspect the insulation of his coil packs is because he lives in the north of England where the atrocious weather patterns can quickly turn a small crack into a misfire.
When the insulation is compromised, it doesn't take much moisture to cause all or some the LV or HV to track to the chassis before getting to the spark plug. The voltage leakage may not even be enough to cause the engine to miss, but enough to lower the spark density giving poor fuel economy which the OP complained of.
Thanks Steve
I'm going to do both of these checks. Just the sort of knowledge I was after.
I find it hard to believe people change things like coil packs with out a proper reason or testing
Cheer's
Being a thrifty Northerner(?) you may be able to hack-repair an otherwise good coil pack with a harline crack. In theory you dry out the coil pack ,clean it so you can identify the cracks and seal with epoxy. There is a Youtube video but....
" Good used" may be an oxymoron in the case of coil packs from a breaker? Try EBay U.K.?
If water has penetrated the cracks, here is what happens:
http://rennlist.com/forums/996-forum/902647-just-replaced-the-coils.html
Had a misfire, that progressively got worse. O'Reilly auto parts used a Bosch scan tool, and found that the #6 coil was bad.
I removed all 6 coils. all coils were within spec (pin 1-3 resistance primary winding).
Replaced #6 with a Beru to correct the misfire.
If a scan tool is not available, the best test is to remove the allen screws that secure each coil, engine running, pull each coil out and listen for a change in engine speed/sound. Replace the coil and repeat for the remaining coils to determine the bad coil(s).
This tests both the primary and secondary windings.
I certainly wouldn't disconnect a plug HT coil pack with the engine running - especially one that's bolted onto the cylinder head and me on my back under it.
Maybe on an older car where you can short out the plug lead with a screwdriver to determine which plug wasn't firing correctly, but on a flat 6 engine with 25,000 volts, I don't think so....
What about these?
Plasma Direct Ignition Coil Pack (PACK OF 6) Porsche 996/997 & Boxster 986/987 & Cayman
"...The spark amperage is increased by 100%, allowing the spark to reach many more molecules, which therefore accelerates the ignition and combustion processes. This is extremely important in forced induction applications, but also improves the performance of normally aspirated engines.
The Plasma Direct will increase horsepower and torque throughout the entire RPM range, as well as reducing fuel consumption. Even engines with legendary smoothness will be further refined with the Plasma Direct upgrade. Plasma Direct coils are OBD II compliant. ..."
Good stuff (i mean technically, not talking about value for money)?
Pelican sells two replacement Beru coils:
996-602-101-01-INT $40
997-602-107-02-M47 $38
Porsche Boxster (1997-2004) - Ignition - Page 2
The latter notes: New style coil. Longer hold down bolts are included.
Has anyone tried these? Any problem with the apparently bigger size?
Any performance / longevity etc improvement with the newer style coil?
This is a source reference. Confirm exact model applicability in the original material.
