Welcome to 911UK
The only place for Porsche, 911uk is the definitive enthusiast and resource site for the Porsche 911.
Registration is fast, simple and absolutely free, so join up today for full access to the site and benefit from latest member offers.

Porsche Classifieds
Sell Your Porsche on 911uk
Create a Free Classified Advert
Search Ads
Classified Adverts FAQ
Trade Classified Information
Buyer & Seller Fraud Protection
Consumer Rights Act
Pre Purchase Inspection (PPI)
Porsche Car Sourcing
Porsche Cars Wanted
Official Porsche Centre Reviews
Porsche 911
992 : 2019- 0
991 : 2011- 24
997 : 2004- 65
996 : 1997-2005 35
993 : 1993-1998 4
964 : 1989-1993 1
Carrera 3.2 : 1983-1989 2
Carrera SC : 1977-1983 2
930 Turbo : 1975-1989 1
Early 911 : 1964-1977 1
Porsche Other Models
Classic : 1950-1965 0
Boxster : 1997- 30
Cayman : 2005- 21
Cayenne : 2003- 6
Macan : 2014- 5
Panamera : 2009- 0
912-914-924-928-944-968 1
959 - CarreraGT - RaceCar 0
Car Parts For Sale & Wanted
Other Items For Sale & Wanted
Wheels Tyres For Sale & Wanted
Number Plates For Sale Wanted

Porsche Services
Porsche Body Shop Repair
Paint Protection & Wrapping
Porsche Classic Insurance
Porsche Classic Parts
Porsche Classic Restoration
Porsche Design Collection
Porsche Engine Gearbox Rebuild
Porsche Heritage & History
Porsche News
Porsche Picture Gallery
Win a New Porsche 911

Porsche Parts
Body Parts, Body Styling
Brakes, Clearance
Electrical, Exhausts
Engine Cooling, Engine Electrical
Engine Rebuild, Heating Cooling
Interior Incar, Lighting
Rubber Seals, Service Parts
Steering, Suspension
Transmission, Workshop Tools
Early 911, 911 - 930, 928 - 968
964 - 993, 996 - 997, Boxster
Cayman, Cayenne, Panamera

Porsche Model Range
911 [992] 2018-Current
Porsche 911 [992]
911 [991] 2011-2019
Porsche 911 [991]
911 [997] 2004-2012
Porsche 911 [997]
911 [GT] GT1-GT2-GT3
Porsche 911 [GT]
911 [996] 1997-2005
Porsche 911 [996]
911 [993] 1993-1998
Porsche 911 [993]
911 [RS] RS-RSR
Porsche 911 [RS]
911 [964] 1989-1993
Porsche 911 [964]
911 3.2 1983-1989
Porsche 911 3.2 Carrera
911 SC 1977-1983
Porsche 911 SC
911 [Early] 1964-1977
Porsche 911 [Early]
Boxster & Cayman
Porsche Boxster & Cayman
Cayenne & Panamera
Porsche Cayenne & Panamera

911uk Site Partners

Post new topic   Reply to topic
Author Message

Joined: 08 Jul 2017
Posts: 1

PostPosted: Sat Jul 08, 2017 11:01 am    Post subject: Intermittent Starting Fault Reply with quote

My car has been suffering an intermittent electrical / starting fault over the last few years and it seems the mechanics at the local Porsche independent are unable to identify the problem.

I think it's time I tried a different tack, so I'm looking for recommendations for the best auto-electrician, based in South London (as that's where the car is right now), please.

The problem manifests itself when the engine is hot (i.e. above normal cruising hot). After the engine has been switched off for a few minutes (say, to refuel), the engine won't restart. The usual ignition / warning lights come on, but nothing happens when the key is turned to the start position. After allowing the engine to cool down for 15-30mins, it will start normally. Once started, the engine runs fine. Provided the engine doesn't get abnormally 'hot', the car will always fire first time, even if restarting.

The usual diagnosis is a faulty starter motor - that's what I was told this morning, until I pointed out the garage had fitted a brand new one last year (a few hundred miles ago), when I'd been told that they had found and fixed the problem!

An immobiliser issue (it's an aftermarket unit that otherwise works fine) could be another cause, or a dodgy contact / wire somewhere which opens up when the engine is hot.

Seems to be one of those hard to identify (i.e. no fault codes generated), intermittent faults that mechanics hate these days, and it might just be more profitable to turn the focus on the potential electrical issues than keep fitting new parts.

View user's profile Send private message
Brands Hatch
Brands Hatch

Joined: 25 Oct 2009
Posts: 13077
Location: Cheshire

1993 Porsche 964 Anniversary

PostPosted: Sat Jul 08, 2017 3:51 pm    Post subject: Reply with quote

Sounds to me like a classic DME relay issue. Have you tried a new one?

The is also another potential where the petrol can evaporate/run back when hot which has cropped up for a few Rennlist owners. Can't remember the fix for this but I thinks to do with the expansion tank Dont know

ETA just read the fact it won't crank. In which case I'd say an earth strap problem on the starter motor and/or the one from then-be battery terminal to the body. Swap them both. Cheap as chips.
The game's afoot. It's time to put a bit of (Colini) stick about......964/993 wanted. Cash waiting. No dreamers
View user's profile Send private message

Joined: 30 Apr 2006
Posts: 111
Location: The road to hell

PostPosted: Sun Jul 09, 2017 7:14 pm    Post subject: Reply with quote

^^^^^^^^ what Zingari says sounds spot on.
Previous to current.......
993 C4 Coupe - 996TT Coupe - 3.2 Carrera Sport - 964 C2 Coupe.
Wish list.... 997 GT3 comfort spec.
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic   All times are GMT - 12 Hours
Page 1 of 1

Jump to:  

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