986Forum

Flat throttle response on pull away 2.5 Boxster S - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Add to repair workspace

3 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHFlat throttle response on pull away 2.5 Boxster S - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Leading reported evidence

Check air filter, a little dirt and they don't want

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
the first thing I would do is check the air filter, a little dirt and they don't want to go.
Original post Read captured discussion
Flat throttle response on pull away 2.5 Boxster S - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Read full discussion summary

Leading evidence: 'Check air filter, a little dirt and they don't want' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check air filter, a little dirt and they don't want' (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.

Read captured replies

1 matching discussions · 3 captured posts examined · 0 partial discussions

Compare 1 other evidence results

Replace mass air flow sensor

Suggestion or failed attempt

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
If you unplug the MAF and your car runs better, clean or replace your MAF.
Original post Read captured discussion
Flat throttle response on pull away 2.5 Boxster S - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Frequently discussed actions (2)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Check air filter, a little dirt and they don't want

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 first thing I would do is check the air filter, a little dirt and they don't want to go.
Original post Read captured discussion
Flat throttle response on pull away 2.5 Boxster S - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Replace mass air flow sensor

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
If you unplug the MAF and your car runs better, clean or replace your MAF.
Original post Read captured discussion
Flat throttle response on pull away 2.5 Boxster S - 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.

3 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: 20261026T194705Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I have a 1999 2.5 Boxster S Tip. Owned for 1 year Just turned 60K and due a service. Had an air filter about 1K miles back. Fuel economy about 30 MPG (UK) on a run. Its had this engine 'dying' problem showing up over the last few months. OK start the car - no problems and tick over is fine and steady. Get the engine up to temperature, performance seems ok but not powerful or that torquey(have not driven one before maybe expecting too much from 2.5). Sitting in stationary traffic for a few minuets or at the lights or worse stopped and needing to turn across on-coming traffic the engine almost stalls on normal throttle depression, then picks up sluggishly and away. There is no engine light on. Please can someone suggest the best plan to track down the likely cause. Have read about sensors and fault codes but what should I look at first?

POST 2Original post

Quotes source post: 300391

FYI: Porsche did not build a 99 Boxster "S" model as far as I know. The 2.5 cars were all Base models with a 3.2L "S" available in 2000. As for your sluggish performance, a failing MAF is the most common cause. It will degrade performance well before tripping a check engine light. If you unplug the MAF and your car runs better, clean or replace your MAF.

POST 3Original post

the first thing I would do is check the air filter, a little dirt and they don't want to go. then the maf and lastly the fuel filter, a lot of people forget about the fuel filter under the center panel under the car and topless is right the first S came out in 2000 with a 3.2 liter engine

This is a source reference. Confirm exact model applicability in the original material.