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2001 Boxster S engine turns over but as tough time firing.

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Original source
3 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH2001 Boxster S engine turns over but as tough time firing.

Leading reported evidence

Use oscillioscope

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

i have the test in the shop manual but they say to use an oscillioscope but a cheap analog or good digital multimeter will show you, the old analog is good as you see the needle fixed and then jump , the cheap digital sometimes dont respond fast enough

Original post Read captured discussion
2001 Boxster S engine turns over but as tough time firing.
Frequently discussed work

Install cps, crank position sensor

No successful repair reported for this finding.

0
Reported fixes
1
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that report an unsuccessful attempt
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.

Unsuccessful attempt · Original poster

I installed a new CPS, crank position sensor. It helped but did not solve the problem.

Original post Read captured discussion
2001 Boxster S engine turns over but as tough time firing.
Read full discussion summary

Leading evidence: 'Use oscillioscope' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install cps, crank position sensor' (1 discussions). For that action, 0 discussions report a resolution and 1 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

Install cps, crank position sensor

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
1
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 report an unsuccessful attempt
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.

Unsuccessful attempt · Original poster

I installed a new CPS, crank position sensor. It helped but did not solve the problem.

Original post Read captured discussion
2001 Boxster S engine turns over but as tough time firing.
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.

Install cps, crank position sensor

No successful repair reported for this finding.

0
Reported fixes
1
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that report an unsuccessful attempt
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.

Unsuccessful attempt · Original poster

I installed a new CPS, crank position sensor. It helped but did not solve the problem.

Original post Read captured discussion
2001 Boxster S engine turns over but as tough time firing.

Use oscillioscope

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 have the test in the shop manual but they say to use an oscillioscope but a cheap analog or good digital multimeter will show you, the old analog is good as you see the needle fixed and then jump , the cheap digital sometimes dont respond fast enough

Original post Read captured discussion
2001 Boxster S engine turns over but as tough time firing.
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.

  • Pelican Parts: 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: 20261026T052503Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

My 2001 Boxster (affectionately named Turd, recognizing its macadamia metallic colour and recent performance) has recently become an inconsistent starter. The engine turns over great and sometimes it will start just fine. Other times, hot or cold, it will take a number of engine revolutions before it starts to fire and then finally starts, then runs fine. No dura metric codes or engine light. It hasn't let me down yet but it's embarrassing and will wear out the starter and battery in time. Relevant work in last 6 months: New fuel pump, new fuel relay, new spark plugs, new air filter, new fuel filter, new axles, new headlight switch, new transmission oil and engine oil. Threads lead me to believe next step is the crank case sensor replacement. Any ideas?

POST 2Original post

hi there , i know a lot about no start or hard start just spent a week on my 996 to figure it out ( see the mystery tread ) when it does not start , do you have fuel and spark or both missing i have had the same issue with my audi allroad , would run fine one day , then no start what so ever , but then i would wait an hour and it would run fine , totally random no start condition test your crank angle sensor , you should have the same voltage ( about 2.5 volts ) for 300 degrees of the revolution then spike to 3 i have the test in the shop manual but they say to use an oscillioscope but a cheap analog or good digital multimeter will show you, the old analog is good as you see the needle fixed and then jump , the cheap digital sometimes dont respond fast enough

POST 3 / ORIGINAL POSTEROriginal post

Thanks everyone so far. I'm getting closer to solving Turd's unwillingness to start. I installed a new CPS, crank position sensor. It helped but did not solve the problem. Turns out I am losing fuel line pressure when Turd is turned off. Must be a check valve not holding or something. I'll update when it's solved.

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