08-01-2017, 01:18 PM
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#1
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Registered User
Join Date: Oct 2013
Location: San Jose, CA
Posts: 583
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Mountain Driving - Boxster Won't Start!
Hi All - I'd appreciate some direction here -
Took a nice drive up to Tahoe over the weekend, got to about 4000 feet going up hwy 88 and pulled over to check out the view. Got back in my 2000 S with 122k miles that has been running beautifully, and got the "crank - not start" thing.
I waited about 10 minutes and tried again - same thing. Waited another 45 min and tried. Still no joy. At that point I decided to cut my losses and call AAA. They took it the 170 miles to my house while I got a rental car and finished my vacation.
When I got home Sunday afternoon, i went out to the car (crossing my fingers), and sure enough, it started right up! So I *think* that rules out what I had initially suspected as the fuel pump.
I've heard it could be the "fuel vent valve" our something, but haven't come across anything definitive. Again, it runs great, so probably not a cam sensor or bad coils.
Anyone have an idea? Sure would be grateful for any tips...
__________________
2000 S - Borla Exhaust, TS Cat Deletes, RSS UDP, B&M Short Shift, T96 Steering Wheel, Potenza RE-71R's,
Mantis 2.0L Deep Sump, de-snorkeled, Bilstein PSS9 Coil-Overs, Rennline lug studs, and auto crossed regularly.
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08-01-2017, 01:50 PM
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#2
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Registered User
Join Date: May 2012
Location: Vancouver Island, Canada
Posts: 211
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Sounds like a possible Crank Position Sensor acting up. They tend to fail when hot and work again after the engine has cooled. Search here for CPS and there are numerous threads / repair diy's.
Here is one of the threads:
http://986forum.com/forums/boxster-general-discussions/66083-help.html
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'01 Boxster S (purchased new) triple black, litronics, cruise, heated seats,18's.
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08-01-2017, 03:48 PM
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#3
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There Is No Substitute.
Join Date: May 2007
Location: West Coast
Posts: 3,253
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Most likely a failing CPS sensor, for the reasons mentioned by ccjazz.
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1999 Ocean Blue Metallic Boxster - blueboxster.com
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08-01-2017, 04:05 PM
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#4
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Registered User
Join Date: Oct 2014
Location: California Central Coast
Posts: 1,476
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When cranking if the tach doesn't move then CPS likely. Another item that can exhibit this type behavior is the fuel pump relay. They are cheap and easy to replace and is the first thing I'd change.
Last edited by 911monty; 08-01-2017 at 04:11 PM.
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08-01-2017, 05:41 PM
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#5
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Registered User
Join Date: Jun 2016
Location: Detroit
Posts: 211
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Heat and altitude. Vapor lock? Next time try loosening the gas cap.
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08-01-2017, 06:40 PM
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#6
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Registered User
Join Date: Oct 2013
Location: San Jose, CA
Posts: 583
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Quote:
Originally Posted by Disaster
Heat and altitude. Vapor lock? Next time try loosening the gas cap.
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Huh! I thought Vapor lock was a thing of the past! I'll try...thx!
__________________
2000 S - Borla Exhaust, TS Cat Deletes, RSS UDP, B&M Short Shift, T96 Steering Wheel, Potenza RE-71R's,
Mantis 2.0L Deep Sump, de-snorkeled, Bilstein PSS9 Coil-Overs, Rennline lug studs, and auto crossed regularly.
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08-01-2017, 06:42 PM
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#7
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Registered User
Join Date: Oct 2013
Location: San Jose, CA
Posts: 583
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Quote:
Originally Posted by 911monty
When cranking if the tach doesn't move then CPS likely. Another item that can exhibit this type behavior is the fuel pump relay. They are cheap and easy to replace and is the first thing I'd change.
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Good thinking Monty - I might as well do that one too!
__________________
2000 S - Borla Exhaust, TS Cat Deletes, RSS UDP, B&M Short Shift, T96 Steering Wheel, Potenza RE-71R's,
Mantis 2.0L Deep Sump, de-snorkeled, Bilstein PSS9 Coil-Overs, Rennline lug studs, and auto crossed regularly.
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08-01-2017, 06:43 PM
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#8
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Registered User
Join Date: Oct 2013
Location: San Jose, CA
Posts: 583
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Quote:
Originally Posted by ccjazz
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Thanks Rick and Jazz - will check it out for sure!
__________________
2000 S - Borla Exhaust, TS Cat Deletes, RSS UDP, B&M Short Shift, T96 Steering Wheel, Potenza RE-71R's,
Mantis 2.0L Deep Sump, de-snorkeled, Bilstein PSS9 Coil-Overs, Rennline lug studs, and auto crossed regularly.
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08-02-2017, 12:49 AM
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#9
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Registered User
Join Date: Jun 2016
Location: Detroit
Posts: 211
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Quote:
Originally Posted by Dlirium
Huh! I thought Vapor lock was a thing of the past! I'll try...thx!
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Fuel injection and submerged fuel pumps got rid of most of the problem which was caused by the fuel literally boiling in the lines but there can still be issues in the fuel delivery system especially if it isn't venting properly.
Last edited by Disaster; 08-02-2017 at 12:55 AM.
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08-02-2017, 04:16 AM
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#10
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Registered User
Join Date: Sep 2012
Location: S. New Jersey
Posts: 1,239
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I have felt this pain because of fuel pump relay. Hard to replicate as they heat up and then stop working so you need to get it to that state to jumper to test.
Not an expensive part so not a bad idea to have a extra on hand
__________________
2002 S - old school third pedal
Seal Grey
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08-02-2017, 06:08 AM
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#11
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Registered User
Join Date: Mar 2017
Location: Arizona
Posts: 178
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Had the same problem it was the CPS.
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08-02-2017, 10:05 PM
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#12
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ISSIMI
Join Date: Apr 2017
Location: Bay Area CA
Posts: 146
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CPS seems right. This happened to me a few months back. Driving calaveras/felter/sierra. Stopped at the shell station after the long downhill strait. When i went to restart i had a no crank issue. luckily it only lasted for a few minutes.
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08-03-2017, 05:59 AM
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#13
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Registered User
Join Date: Jun 2017
Location: Madison, WI
Posts: 114
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There's nothing funny about vapor lock
__________________
'99 986 Ocean Blue Metallic
'87 924S, winter beater
'17 VW Golf Sportwagen, for when I need extra seats
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09-09-2017, 09:54 AM
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#14
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Registered User
Join Date: Oct 2013
Location: San Jose, CA
Posts: 583
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OK, Again - thanks to all that commented. I replaced the Crankcase Position Sensor as well as the fuel pump relay. Good news is that it fired right up! I haven't taken it on an extensive trip yet, but so far, so good!!
__________________
2000 S - Borla Exhaust, TS Cat Deletes, RSS UDP, B&M Short Shift, T96 Steering Wheel, Potenza RE-71R's,
Mantis 2.0L Deep Sump, de-snorkeled, Bilstein PSS9 Coil-Overs, Rennline lug studs, and auto crossed regularly.
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09-09-2017, 11:49 AM
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#15
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Registered User
Join Date: Sep 2013
Location: Montreal, QC. (currently expat to Shanghai)
Posts: 3,249
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"VaporLock" - Sounds like a Rock Band
Guess you've done that already but just in case... have you scanned for fault codes? Erase them and see if they come back, etc?
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'97 Boxster base model 2.5L, Guards Red/Tan leather, with a new but old Alpine am/fm radio.
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