Pelican Parts

1999 996 C4 won't start

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Original source

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH1999 996 C4 won't start

Leading reported evidence

Replace cap

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
P0455 - Porsche Code 94 - Tank vent system (this is an ongoing issue, replaced cap twice)
Original post Read captured discussion
1999 996 C4 won't start

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Leading evidence: 'Replace cap' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace cap' (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.

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1 matching discussions · 2 captured posts examined · 0 partial discussions

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Replace relay

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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
Because the code 167 was fuel related, I thought this was the culprit and replaced the Relay.
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1999 996 C4 won't start

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.

Replace cap

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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
P0455 - Porsche Code 94 - Tank vent system (this is an ongoing issue, replaced cap twice)
Original post Read captured discussion
1999 996 C4 won't start

Replace relay

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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
Because the code 167 was fuel related, I thought this was the culprit and replaced the Relay.
Original post Read captured discussion
1999 996 C4 won't start

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.

2 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: 20261027T075545Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

My wife was driving her C4 home from a 100 mile trip and it died about a mile from home (I know...thank goodness) She restarted it and it ran and drove for a few seconds, then died again. It started one more time only for an even shorter period and hasn't started since. I had it towed home thinking I would be able to figure it out. I got a Durametric tool and pulled the codes: P1130 - Porsche Code 361 O2 sensing adaptation, idle range bank 2 P1128 - Porsche Code 360 O2 sensing adaptation, idle range bank 1 P0455 - Porsche Code 94 - Tank vent system (this is an ongoing issue, replaced cap twice) P1124 - Porsche Code 167 - Fuel Pump Relay, below limit value Because the code 167 was fuel related, I thought this was the culprit and replaced the Relay. No love. I still get the code after the replacement. It seems as though I can hear the fuel pump working when I turn the key, could it be that the fuel pump itself is not working like it should or perhaps the fuel pressure regulator? The car turns over fine, but will not fire. Any help would be appreciated...thanks.

POST 2Original post

A thought from the 'old school'..Fuel starvation could be a fuel pump failure or a blocked carborator. My two cents for what it's worth. Good luck.

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