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My 1999 996 will not start

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHMy 1999 996 will not start

Leading reported evidence

Check fuses c1, c2 and c4

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 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.

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
First check fuses c1, c2 and c4.
Original post Read captured discussion
My 1999 996 will not start

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Leading evidence: 'Check fuses c1, c2 and c4' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check fuses c1, c2 and c4' (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.

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1 matching discussions · 5 captured posts examined · 0 partial discussions

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Run start too much

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
NO need to run the start too much.
Original post Read captured discussion
My 1999 996 will not 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.

Check fuses c1, c2 and c4

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
First check fuses c1, c2 and c4.
Original post Read captured discussion
My 1999 996 will not start

Run start too much

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
NO need to run the start too much.
Original post Read captured discussion
My 1999 996 will not start

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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.

Rennlist: 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: 20261026T200546Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

My 996 usually starts quick and strong. Last night when the car was cold and it was in the 40s out, I moved it from outside to the garage. The car was on for a very short time .. I know this is a bad thing to do. Today it will not start. It turns over good, but just spins and is not starting. Is there something in this short trip that could have messed something up? In ideas on how do undo it? Mark

POST 2Original post

Put gas in it.

POST 3Original post

Quotes source post: 11808370

Could be a couple of things. My favorite is the fuel pump. Classic fuel pump failure. The engine cranks just fine but not one hint of any cylinders firing. After a few seconds of cranking with no signs of engine life, give a sniff of the exhaust. If you don't smell fuel...Fuel pump. NO need to run the start too much. You'll have a burned out starter to go with your burned out fuel pump. Well, I shouldn't get too confident. It could be a fuse or a relay. Another possibility is a crankshaft position sensor (CPS). But fuel pumps fail more often than CPS's.

POST 4Original post

Quotes source post: 11808370

What Macster said. And no, running the engine briefly would have no effect such as you are experiencing.

POST 5Original post

First check fuses c1, c2 and c4. Turn the key to the last position before crank and stay there. You should hear the fuel pump priming for a second or two. When you crank, note if the techo needle bounces a bit.

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