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YOUR RESEARCHBoxster S 986 Engine Problem - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Leading reported evidence
Replace spark plugs
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
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0
Unsuccessful attempts
1
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Performed · outcome unconfirmed · Original poster
I replaced the spark plugs on my 2002 Boxster 986 S.
Boxster S 986 Engine Problem - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Leading evidence: 'Replace spark plugs' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Disconnect /replacement' (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
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed · Original poster
The Beru Coil packs used were part no (0040.100.031)
Boxster S 986 Engine Problem - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Disconnect /replacement
Suggestion or failed attempt
No successful repair reported for this finding.
0
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0
Unsuccessful attempts
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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.
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Suggestion
The ECU takes time to relearn after a battery disconnect/replacement.
Boxster S 986 Engine Problem - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace dead battery
Suggestion or failed attempt
No successful repair reported for this finding.
0
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0
Unsuccessful attempts
1
Discussions
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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.
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Suggestion · Original poster
The only other change to the car was to replace a dead battery with a direct replacement.
Boxster S 986 Engine Problem - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace plugs i noticed the car seemed
Suggestion or failed attempt
No successful repair reported for this finding.
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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.
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Suggestion · Original poster
On changing the plugs I noticed the car seemed to be a little down on power and did not sound as throaty as before it was idling and pulling smoothly.
Boxster S 986 Engine Problem - 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.
5 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 1 discussions
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Outcome without a verified action link
Just followed those steps but I am still getting the same issues.
Hi,
Looking for any advise or pointers to try to rectify the following problem.
I replaced the spark plugs on my 2002 Boxster 986 S.
I started with OEM Beru plugs (14FGR-6KQU).
The plugs that came out of the car were Bosch Super.
On changing the plugs I noticed the car seemed to be a little down on power and did not sound as throaty as before it was idling and pulling smoothly.
I did notice that the a few of the coil packs on the car were showing cracks in the the plastic casing and as they were still original on the car I decided to replace them to see hoping this may be part of the issue.
I also order a set of the Bosch plugs that were originally in the car (Part No. FGR6KQE). The Beru Coil packs used were part no (0040.100.031)
On fitting the new Beru coil packs and Bosch plugs there is definitely an improvement in sound of the car, it still idles smoothly and appears to pull strong throughout the rev range. (Maybe lacking a little low end power before 4000rpm)
The really noticeable difference for me is that the previous throaty induction noise at around 3000-4000 rpm at full throttle has disappeared.
Also on starting the car it intermittently does not roar into life like of used to and just kind of coughs and then starts without the nice roar I remember. It never fails to start.
I have done a good few miles on the car and hooked to OBD scanner and can find no faults and have no check engine light.
I torqued all plugs to 28nm and was very careful to ensure all connectors of each coil clicked into place.
Can anyone help me as to what could be causing this?
The only other change to the car was to replace a dead battery with a direct replacement.
Any help much appreciated.
Anytime the battery loses power you have to do the throttle initialization.
Insert key & turn to ignition switch position 2 (power on but not engaging starter)
Leave key in this position for 1 minute & do not touch gas pedal.
After 1 minute turn key back to off position but do not remove for at least 10 seconds.
Now you have set the E-gas throttle position & you can start the car. It should idle much better & have better throttle response.
Thank you! I was not aware of the need to reset e-gas.
Just followed those steps but I am still getting the same issues.
Not sure what else could be the problem..
Thanks.
I have only driven approx 200km since it was disconnected, and approx 5/6 stop start cycles.
Seems to be a small improvement will keep driving and see if there is any further improvement!
The induction noise between 3000-4000K is still very weak.
This is a source reference. Confirm exact model applicability in the original material.
