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YOUR RESEARCHMore strange engine issues... - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Leading reported evidence
Replace 2 solenoids along
Performed · outcome unconfirmed
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Performed · outcome unconfirmed · Original poster
First id like to thank you on how helpful you have been ever since I bought this Boxster, now for the evap system, I took off the passenger fender liner and replaced the 2 solenoids along with the charcoal canister, so for the evap system that leaves the lines themselves along with the solenoid under the intake manifold.
More strange engine issues... - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Leading evidence: 'Replace 2 solenoids along' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace 2 solenoids along' (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
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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
With all the parts you are throwing at it, it might not be a bad idea to have a shop spend an hour or 2 doing a diagnostic on it so you can replace only what is necessary to fix the issue.
More strange engine issues... - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace those
Suggestion or failed attempt
No successful repair reported for this finding.
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Reported fixes
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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.
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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
I suppose my next move is to first do a smoke test to see if there are any post MAF vacuum leaks, then if nothing obvious shows its to test the evap valve under the throttle and presumably replace those.
More strange engine issues... - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Smoke-test will only show you obvious vacuum leaks
Suggestion or failed attempt
No successful repair reported for this finding.
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Reported fixes
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Unsuccessful attempts
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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
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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
A smoke test will only show you obvious vacuum leaks.
More strange engine issues... - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Test evap valve
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
I suppose my next move is to first do a smoke test to see if there are any post MAF vacuum leaks, then if nothing obvious shows its to test the evap valve under the throttle and presumably replace those.
More strange engine issues... - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Frequently discussed actions (7)
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Replace 2 solenoids along
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
First id like to thank you on how helpful you have been ever since I bought this Boxster, now for the evap system, I took off the passenger fender liner and replaced the 2 solenoids along with the charcoal canister, so for the evap system that leaves the lines themselves along with the solenoid under the intake manifold.
More strange engine issues... - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace only what is necessary
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
With all the parts you are throwing at it, it might not be a bad idea to have a shop spend an hour or 2 doing a diagnostic on it so you can replace only what is necessary to fix the issue.
More strange engine issues... - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace those
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
I suppose my next move is to first do a smoke test to see if there are any post MAF vacuum leaks, then if nothing obvious shows its to test the evap valve under the throttle and presumably replace those.
More strange engine issues... - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Test evap valve
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
I suppose my next move is to first do a smoke test to see if there are any post MAF vacuum leaks, then if nothing obvious shows its to test the evap valve under the throttle and presumably replace those.
More strange engine issues... - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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.
6 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 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: 20261026T191851Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
A major clue I see when reading your post is:
"When filling with fuel the car does not start without mashing the pedal while cranking"
So on a modern day car "mashing the pedal (throttle) just gives the engine more air.
The DME/ECU gives the engine gas.
So your fuel air mixture is to fuel rich after fueling so it will not start until you give it more air by "Mashing the Pedal"
So my guess is that you have an issue with the EVAP system. bad purge valve or the like. An EVAP purge valve stuck in the open position allows fuel vapors back into the intake. So it causes a to fuel rich situation after filling up.
EVAP systems can be a PITA.
Your stalling when coming to a stop can be caused by this same situation.
or.... a vacuum leak.
Have you done a vacuum test with a proper vacuum gauge???
First id like to thank you on how helpful you have been ever since I bought this Boxster, now for the evap system, I took off the passenger fender liner and replaced the 2 solenoids along with the charcoal canister, so for the evap system that leaves the lines themselves along with the solenoid under the intake manifold. I suppose my next move is to first do a smoke test to see if there are any post MAF vacuum leaks, then if nothing obvious shows its to test the evap valve under the throttle and presumably replace those. While the little vacuum hoses have all been replaced the vacuum canister and solenoids haven't so those might be an issue. I was also considering the possibility of a leaky injector? but that would probably throw a MIL
With all the parts you are throwing at it, it might not be a bad idea to have a shop spend an hour or 2 doing a diagnostic on it so you can replace only what is necessary to fix the issue. Been down this route with other cars. Sometimes it is a good idea to take a step back and have another set of eyes on an issue vs replacing parts that may not even be the issue.
I suspect you have a vacuum leak and/or an issue with a ground wire or wiring issue somewhere
A smoke test will only show you obvious vacuum leaks.
Smoke tests cannot test vacuum on the down stream side of a one-way vacuum operated valve.
Such as the one in the SAI system.
So for example a smoke test would not detect a vacuum leak in the SAI vacuum canister.
A vacuum gauge only costs around $20.00-$25.00
Anyone who tinkers with cars should have one and know how to use it.
They are a very useful diagnostic tool.
I ordered a vacuum tester but I have a whole new issue, so the car runs fine on cold start although the other day I got a P0410 and P1411 Code on cold start, other then that it drives fine but when I come to a stop the idle dips way down and comes back up and it runs a little rough and vibrates at idle. sometimes when I come to a stop it will stall but comes back to life, the other day I got to a stop light and the car stalled and would not start up no matter how much I tried with pedal or anything, it was completely dead, the tachometer did move so I dont think its a crank sensor, but after having the car towed home and sitting for a few hours it started right up as if nothing ever happened. Would this along with my issues at the gas station indicate a fuel pump failing? Im not sure if a simple vaccum leak would cause these conditions
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