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911 won't start

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

Discussion summary

YOUR RESEARCH911 won't start

Leading reported evidence

Use heavy duty jump starter (600+ cca)

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

To get it going I used a heavy duty jump starter (600+ CCA).

911 won't start
Frequently discussed work

Check fuel pressure

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 · Original poster

How do I check the fuel pressure?

911 won't start

Suggestion

check fuel pressure

911 won't start
Read full discussion summary

Leading evidence: 'Use heavy duty jump starter (600+ cca)' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'battery was good' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check fuel pressure' (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 · 18 captured posts examined · 0 partial discussions

Compare 4 other evidence results

battery was good

Suggestion or failed attempt

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
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 suspect a cause
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.

Suspected cause

Most likely the battery WAS good.

911 won't start

Check fuel pressure

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

How do I check the fuel pressure?

911 won't start

Suggestion

check fuel pressure

911 won't start

Replace on the charger

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

If the amps it is pulling doesn't change on the charger after running a charge cycle, it has at least one dead cell.

911 won't start

Run charge cycle

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

If the amps it is pulling doesn't change on the charger after running a charge cycle, it has at least one dead cell.

911 won't start
Frequently discussed actions (5)

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

Check fuel pressure

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 · Original poster

How do I check the fuel pressure?

911 won't start

Suggestion

check fuel pressure

911 won't start

Replace on the charger

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 the amps it is pulling doesn't change on the charger after running a charge cycle, it has at least one dead cell.

911 won't start

Run charge cycle

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 the amps it is pulling doesn't change on the charger after running a charge cycle, it has at least one dead cell.

911 won't start

Run charger

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 so, run the charger for an hour to start.

911 won't start

Use heavy duty jump starter (600+ cca)

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

To get it going I used a heavy duty jump starter (600+ CCA).

911 won't start
Reported and suspected causes (1)

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

battery was good

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect a cause
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.

Suspected cause

Most likely the battery WAS good.

911 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.

18 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.

1 acknowledgements have no verified action link; they do not establish a repair result.

Outcome without a verified action link

I got home about an hour ago and jumped the car and it worked.

No unique explicit quoted action; no causal link assigned

Generation: 20261027T005001Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

my car has been in the garage since thursday night. Saturday night i moed it so i could fit a friends car in the garage as well. This morning it was fairly cold in the garage & the 911 would not start, however it does turn over. I plugged in and turned on a small electric heater I had forgotten about this morning before I went to work. I placed the heater about 3.5 feet behind the rear of the car. It has an auto setting that I turned it to and left it on for the day. It was brutally cold over the weekend, with temperatures ranging from about 10 below to 10 degrees. Just a few minutes ago, I tried to start the car again when I returned home from work with no luck and received the same results from this morning. Does anyone have any suggestions what might be wrong???? Thanks in Advance for any help, Mark ps. I tried to search to see if I could find this as a problem, and after I submitted every search all I received was a blank page on my MacBook Pro.

POST 2Original post

sorry.... i have no idea.... did you call up the dealer and see what they might say....?

POST 4 / ORIGINAL POSTEROriginal post

battery is good - everything electric will work without hesitation and at normal brightness

POST 5Original post

Is there any ignition related fuses or relays in the 996 fuse boxes? I can't access my car at the moment.

POST 6Original post

theres quite a few engine/injection fuses and fuel pump fuses step one check fuel pressure

POST 7Original post

I had the exact same thing happen to me and one of my cars (98 Cobra). To get it going I used a heavy duty jump starter (600+ CCA).

POST 8Original post

I would also try jump starting it. P-cars are notorious for needing a lot of battery power and since it is cold that will diminish crank power.

POST 9Original post

Quite freuquentl, when you start a fuel injected engine and shut it down quickly, you will flood the engine with fuel. Sitting overnight should clear up the flooding, tho. Do get any gas smell when you try to start it or any attempt at firing? With the high compression engine, you need little engine cranking for it to kick over.

POST 10 / ORIGINAL POSTEROriginal post

How do I check the fuel pressure? The car sat overnight and still has the same problem. I will take a look at the fuses and try to jump start it when I get home.

POST 11Original post

stupid idea.... but clutch pedal switch? You said everything works but electrical.

POST 13Original post

agreed - thats why it was stupid idea - comment withdrawn

POST 15Original post

Most likely the battery WAS good. Cold can very easily kill a battery. If it is cranking slowly, this is the first sign. I've had a couple good batteries die in a good cold spell. Get a battery charger. Hook it up and look at the amps it is pulling. Most likely you battery will be down. If so, run the charger for an hour to start. If it starts, you know. If the amps it is pulling doesn't change on the charger after running a charge cycle, it has at least one dead cell.

POST 16Original post

Silly question, but did your clock reset? When my battery went south, that was one of the first indicators that I was headed into deep weeds.

POST 18 / ORIGINAL POSTEROriginal post

Gas was 2/3+ of a tank & the clock did not restart. The car would crank when the key was turned, but just would not start. I got home about an hour ago and jumped the car and it worked. I then took it to pick up my son and when I left their the car started fine. We are ood for now. I had no idea that the cold temps could mess with a battery. Now that I can relax a little, it is time for a nice glass of Crown Royal Reserve on ice!!

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