Posted: Thu Sep 14, 2017 10:05 pm Post subject: Loss of Power
Hey guys, so my 987 has been sitting with a pretty empty fuel tank (5miles range) for the last 5 days, today I went and filled up to the brim, and then went for a drive in town. After about 5 miles when I pulled off from a set of lights and changed into 2nd there was a loss of power, nothing was happening, so I stopped, then had to go into 1st and go again...everything was fine. then in another 2 miles same thing happened. I switched off the engine, then switched it back on and the idle was jumping dipping and rising slightly (I would say from 800-1100rpm..). Switched off again, drove for a mile, switched off and on the engine again - fine, again switched off and on - fine, revved it myself - fine, the revs settled, switched off and on again, again rock solid as it has always been... No CEL lights, and connected my cheap universal error code reader - 0 errors...any ideas? Maybe MAF?
kurlykris Watkins Glen
Joined: 30 Jun 2014 Posts: 2170 Location: Warwickshire
Posted: Thu Sep 14, 2017 11:36 pm Post subject:
Sounds like you have dragged all of the dirt throught the fuel pump and filter to me, resulting in fuel starvation. I don`t like to run any of my cars down below 1/4 of a tank for this very reason _________________ 1998 996.1 C2 3.4 with "Aerokit Cup"
2006 Boxster S sport chrono
2010 Mercedes E350 AMG Sport
deMort Zolder
Joined: 21 Mar 2015 Posts: 5146 Location: Brighton
Posted: Fri Sep 15, 2017 6:48 pm Post subject:
Poor running and no fault codes does lean towards a fuel pump issue .. the car cant monitor fuel pressure hence no code ( it dont know whats going on )
Maf also doesn,t normally give a code .. unplug it and drive it .. you will get a code then which will need clearing but if the fault persists then its not that.
A faulty maf usually will stop the car from reving past 4k rpm under load and not really what you have described .
Only other thing .. contaminated fuel .. but i would expect that would make the local news if so .. last time i herd of that there was dead cars all up the road from the garage ! _________________
7pm - 9pm
At an Indy these days !
rus_987 Trainee
Joined: 12 Jul 2017 Posts: 56
Posted: Fri Sep 15, 2017 8:16 pm Post subject:
Demort wrote:
Poor running and no fault codes does lean towards a fuel pump issue .. the car cant monitor fuel pressure hence no code ( it dont know whats going on )
Maf also doesn,t normally give a code .. unplug it and drive it .. you will get a code then which will need clearing but if the fault persists then its not that.
A faulty maf usually will stop the car from reving past 4k rpm under load and not really what you have described .
Only other thing .. contaminated fuel .. but i would expect that would make the local news if so .. last time i herd of that there was dead cars all up the road from the garage !
Well I drove it today and ran fine! And I only ever used shell v power nothing else.
By the way, can u pm where you are based. I'd like to come see you sometime. As my grandad used to say, you need to make friends with a mechanic, a policeman, a doctor, and a killer. I have all, but not a mechanic. Mcdermott this is where you come in. Lol joking, I just would like you to give the car a look over.
The return of Marty Wild Suzuka
Joined: 04 Nov 2016 Posts: 1040
Posted: Sun Sep 17, 2017 7:25 am Post subject:
You will not be disappointed by a trip to Demort, I went to his outfit despite it being 120 miles from my house. He'll be seeing my car again in the future. _________________ Life's too short for cr4ppy cars, keep it German!
Cayman S 987.1
All times are GMT - 12 Hours
Page 1 of 1
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum You can attach files in this forum You can download files in this forum You cannot post calendar events in this forum
![Porsche 911 [991]](./images/models/998.png)
![Porsche 911 [997]](./images/models/Model-997.gif)
![Porsche 911 [GT]](./images/models/Model-GT.png)
![Porsche 911 [996]](./images/models/Model-996.gif)
![Porsche 911 [993]](./images/models/Model-993.gif)
![Porsche 911 [RS]](./images/models/Model-RS.gif)
![Porsche 911 [964]](./images/models/Model-964.gif)
![Porsche 911 [Early]](./images/models/Model-Early.gif)
