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rus_987
Trainee


Joined: 12 Jul 2017
Posts: 56



PostPosted: Thu Sep 14, 2017 10:05 pm    Post subject: Loss of Power Reply with quote

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?
 
  
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kurlykris
Kyalami


Joined: 30 Jun 2014
Posts: 1866
Location: Warwickshire


PostPosted: Thu Sep 14, 2017 11:36 pm    Post subject: Reply with quote

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 nooo
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1998 996.1 C2 3.4 with "Aerokit Cup"
2006 Boxster S sport chrono
2010 Mercedes E350 AMG Sport
 
  
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Demort
Estoril


Joined: 21 Mar 2015
Posts: 3502
Location: Sussex


PostPosted: Fri Sep 15, 2017 6:48 pm    Post subject: Reply with quote

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 !
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rus_987
Trainee


Joined: 12 Jul 2017
Posts: 56



PostPosted: Fri Sep 15, 2017 8:16 pm    Post subject: Reply with quote

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.
 
  
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The return of Marty Wild
Hockenheim


Joined: 04 Nov 2016
Posts: 749



PostPosted: Sun Sep 17, 2017 7:25 am    Post subject: Reply with quote

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.
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Life's too short for cr4ppy cars, keep it German!

Cayman S 987.1
 
  
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