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YOUR RESEARCHWhat would cause a boxstwr to just cut off when driving? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Reported or suspected cause
same temperature as the rest
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No successful repair reported for this finding.
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1
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Suspected cause · Original poster
I checked what I think was the fuel relay and it was the same temperature as the rest.
What would cause a boxstwr to just cut off when driving? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Leading evidence: 'same temperature as the rest' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'same temperature as the rest' (1 discussions; 0 report identifying it and 1 suggest it). 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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What would cause a boxstwr to just cut off when driving? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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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.
20 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 1 discussions
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2 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
My gas gauge is off and when I had this happen leaving a parking lot 5 gallons of gas did the trick.
Driving down to Sebring, my boxster just cut off while driving down the highway. No warning lights, no spills, good oil and coolant, and it turns over good when cranking, it just won't start. Any culprits come to mind? Fuel filter is new as of Christmas.
I got a little gas, and it cranked right up. Went to a gas station and it only took 11.something gallons to fill. Less than 2 miles later it cut off again... Sigh...
One of the problems with these car is the fuel pump does not always stay lock down on the bottom of the tank after a pump replacement. Either that, the locking tabs broke, or it was not installed correctly to begin with. So because of this the pump and pick up floats a bit, and becomes uncovered at about 1/4 tank level. Thus the running out of fuel even with gas in the tank.
but I did not read all your posts.
Sounds to me with the new info your pump is dead. brushes in pump worn out and only making contact sometimes....
That is... if its a fuel issue
Try a jumper on the relay. I've never had a bad relay on my boxster, but have had Mercs, Volvos and Saabs do just what you describe because of bad fuel pump relays...most often when the OAT is warm.
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I checked what I think was the fuel relay and it was the same temperature as the rest. Of course it has had time to cool down. I called triple AAA and I am not impressed with their response time...
I've got my durametric and a laptop, just need to get it hooked up... And figure out what parameters to check...
Suspects:
Fuel relay
Fuel pump
Crank position sensor
I just had the sump dropped and put in an ebs baffle. Since that was the recent work are any of three related to that?
I will have it back home tonight and can dig into it next week... Fun
Take off one of the hoses going to the throttle body and spray some WD 40 into the throttle body while an assistant cranks the motor. If it sputters, then its definitely the fuel system.
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