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
Model
Stock
Porsche 911
992 : 2019- 1
991 : 2011- 19
997 : 2004- 75
996 : 1997-2005 33
993 : 1993-1998 7
964 : 1989-1993 2
Carrera 3.2 : 1983-1989 3
Carrera SC : 1977-1983 2
930 Turbo : 1975-1989 1
Early 911 : 1964-1977 1
Porsche Other Models
Classic : 1950-1965 0
Boxster : 1997- 33
Cayman : 2005- 20
Cayenne : 2003- 6
Macan : 2014- 5
Panamera : 2009- 0
912-914-924-928-944-968 2
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
Stedders
Newbie


Joined: 05 Oct 2010
Posts: 4



PostPosted: Sun Jul 13, 2014 3:26 pm    Post subject: Intermittent ignition starting issues Reply with quote

Hi,

Hoping there's some ignition experts on here can help! For a little while now, my '89 930 has had intermittent starting issues. It either starts straight away, or will turn over without firing. Eventually got round to doing some investigation the other day and as I suspected there was no spark. Getting a smell of fuel from the exhausts when I'd been turning it over so I was pretty sure it wasn't fuel.

The CDI is making it's usual whining sound, but when I checked there was no voltage across the coil with the ignition on. When it does start, there still seems to be no voltage across the coil until I start turning it over, then it jumps to a massive 0.03V! Anyone any ideas what would cause this? And how is my car running with only 0.03V across the coil? Magic?!

Any suggestions gratefully received.

Stedders
 
  
View user's profile Send private message
   
Dave49
Trainee


Joined: 12 Oct 2008
Posts: 52


1989 Porsche 930 Turbo

PostPosted: Sun Nov 30, 2014 7:34 pm    Post subject: Reply with quote

I am no ignition expert but I also have a 1989 930 which had similar problems. Promax were able to start it by "jiggling " the yellow relay which is located on the left side of the engine compartment. Eventually they replaced it and "touch wood" it has not failed to start since. Unfortunately this relay is not made by Porsche anymore, certainly not in Europe anyway. Promax managed to source one from the States( there seems to be more 930 owners over there and spares are more available)
There is quite a bit of info on the net about the problems that this yellow relay can cause to starting including how to short it out to get the car running.
When it won't start try getting someone to move this relay around whilst you crank it over.
Might not help but worth a try.
Good luck!
 
  
View user's profile Send private message
   
Stedders
Newbie


Joined: 05 Oct 2010
Posts: 4



PostPosted: Wed Dec 03, 2014 4:08 pm    Post subject: Reply with quote

Hi,

Many thanks for the reply. Strangely it's been behaving recently but if it happens again I'll look at that relay. Might just get a spare from one of my work trips to the states too if they're quite cheap over there.

Kind regards,

Stedders
 
  
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 cannot attach files in this forum
You can download files in this forum
You cannot post calendar events in this forum