8 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHsluggish acceleration on 99 2.5 automatic need HELP - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Leading reported evidence
Clean maf and unplugged it and nothing
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 · Original poster
I have already cleaned the maf and unplugged it and nothing changed.
sluggish acceleration on 99 2.5 automatic need HELP - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Read full discussion summary
Leading evidence: 'Clean maf and unplugged it and nothing' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean maf and unplugged it and nothing' (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 · Original poster
we did clean throttle body and replaced fuel filter which i do think helped.
sluggish acceleration on 99 2.5 automatic need HELP - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Run fuel cleaners ect in fresh gas
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.
sluggish acceleration on 99 2.5 automatic need HELP - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Use smoke vacuum tester and there is no leaks
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 · Original poster
I have replaced the plugs and plug sleeves, AOS, airfilter, idle control valve, I used a smoke vacuum tester and there is no leaks.
sluggish acceleration on 99 2.5 automatic need HELP - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Clean throttle body
Suggestion or failed attempt
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 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 · Original poster
Ok great i will see what i get going to 62mph I am 235 so i am not helping my case lol I will clean throttle body.
sluggish acceleration on 99 2.5 automatic need HELP - 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.
8 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: 20261027T154520Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hello everyone
I am getting frustrated. I got my 1999 2.5 L Boxster as a project .....Car sat for a number of years and was not rode worthy when I got it so I wasn't able to compare. I have replaced the plugs and plug sleeves, AOS, airfilter, idle control valve, I used a smoke vacuum tester and there is no leaks. car runs , idles excellent. Also ran fuel cleaners ect in fresh gas. but driving it . it feels very sluggish. I have never driven a Boxster so I don't know what it should be like and don't expect it to be a rocket ship but it just doesn't seam right. I have no engine lights on and just passed Connecticut emissions yesterday. I have ordered a new fuel filter but in all my years of experience other then boats changing a fuel filter has done very little.
What else can I look for or try? everything I find says mass air flow sensor but i did the unplug test and it drives the same . feeling defeated
The acceleration of a 2.5 Tip is 7.6s to 62mph. Try to measure the acceleration and if it`s nowhere near to that, you have a problem. Otherwise just get used to what 200HP can do to a car weighing 2900lb.
Ok great i will see what i get going to 62mph I am 235 so i am not helping my case lol I will clean throttle body. I have already cleaned the maf and unplugged it and nothing changed. I am pretty confident its not an maf problem
Well I did the speed test with a buddy and we were around 8.7 sec to get to the 60mph .
we did clean throttle body and replaced fuel filter which i do think helped. will aloso be replacing the coils once they come in and then i think I will be good.
THIS.
Also, the auto transmission isn't helping either. A 2.5L base Boxster driven in the
"D"
transmission setting feels like a slug.
Try driving it in the
"M"
position and rowing through the gears. And remember, these cars don't show their stuff until you're up to speed. They're not dragsters.
Just sayin'..........
TO
This is a source reference. Confirm exact model applicability in the original material.
