6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH996 c4 Starting Issue
Leading reported evidence
Replace fuel tank vent valve
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
, so yesterday I replaced the Fuel Tank Vent Valve on Filler Neck (Bleeder Valve), and the code has not resurfaced.
Leading evidence: 'Replace fuel tank vent valve' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Repair engine very soon' (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.
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.
Replace other vent valve in the engine compartment
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
Replace the other vent valve in the engine compartment.
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
After an hour long "test" run, I shut off the car for 45 minutes or so, came back and it took 20+ seconds of cranking until it stumbled up and fired.
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
After an hour long "test" run, I shut off the car for 45 minutes or so, came back and it took 20+ seconds of cranking until it stumbled up and fired.
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.
6 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.
3 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
Still not like it used to do, (or as it will cold, now) one turn of the key, 1-2 seconds of cranking and it fires.
I've researched this issue for some time, thought I'd post for some direct input. My stock 996 runs well, but when I run it to optimal temperature, like a quick errand, and park it somewhere for a few minutes, then try and start it .... it cranks for 10 seconds or longer (sometimes needs 4-5 attempts) before it stumbles to fire up. When it does start, it seems the engine is stumbling a bit at first, on occasion will die and I repeat the process. There is also a strong fuel smell during this cranking process.
The cranking itself is energetic, the battery is new. I have no other starting issues, just hot starts. I did get a CEL code: P0448;"Evaporative Emission Control System Vent Valve/Solenoid Circuit Shorted" per
P0448 Evaporative Emission Control System Vent Valve/Solenoid Circuit Shorted
, so yesterday I replaced the Fuel Tank Vent Valve on Filler Neck (Bleeder Valve), and the code has not resurfaced. I have test run the car a couple of times since valve replacement, and am now able to say that the situation has improved somewhat. Now it will hot crank about 4-5 seconds (maybe 2 attempts) and will fire. Still not like it used to do, (or as it will cold, now) one turn of the key, 1-2 seconds of cranking and it fires.
Things I am considering trying now at this point are (in order):
- Fuel pump relay, some have reported success, cheap solution ($15)
- CPS, seems like a highly talked about solution for my issue with a moderate rate of success.
- Fuel Pump, many reported similar problems that this fixed, but ouch$$$!
- Coolant temp sensor, I read one or two folks had my issue and this fixed it.
So my question now is.... Is my list in the right order and is there something I've missed here? Any/All suggestions are greatly appreciated!!!
Thanks!
Update 3/24/14
After an hour long "test" run, I shut off the car for 45 minutes or so, came back and it took 20+ seconds of cranking until it stumbled up and fired. Ran great after a couple revs. So problem still there.
Replace the other vent valve in the engine compartment. I think it is called Purge or regeneration valve?
http://forums.rennlist.com/rennforums/996-forum/773261-humming-noise-near-gas-cap.html
I think problems in your engine valve and that's making problems. You are facing problems while starting your car. You have to repair your engine very soon. It will help you to get your performing much better than before.
After receiving the replacement valve part referenced above, I am pleased to say this problem has been corrected. The cel code p0446 has not reappeared, after 200+ miles of driving and have restarted the hot car 6+ times with no issue. Thanks to all that provided direction and the ultimate solution. Probably saved me hundreds of dealer/indy diagnostic dollars by putting this $94 part in, which only took five minutes!
This is a source reference. Confirm exact model applicability in the original material.
