intermittent start problem driving me mad - Page 2

Nicholas Lewin · Jan 29th, 2018, 22:40

Chris

Mine has died on me annoyingly twice in the two years that I have had it

First time, HT lead fault, so I simply replaced the lot (cold, damp morning)

Second time, fuse 6. Already been mentioned in this thread. Modern 'ceramic' fuses are plastic and over time they can shrink and then make intermittent contact - no contact = no fuel pumps = no go!

Easy enough to resolve and probably worth changing more frequently than recommended intervals for reliability

halfnelson · Feb 2nd, 2018, 15:43

Success! Was the Crank Position Sensor as suggested. Bought one from Classic Swede and - after some contortionism and swearing - swapped the old one out to find the wire had melted through to reveal one of the wires. Thanks for the input

Laird Scooby · Feb 2nd, 2018, 16:04

What plug gap are you running?

halfnelson · Feb 2nd, 2018, 16:51

Can't remember off the top of my head but always gapped as per Volvo manual.

Laird Scooby · Feb 2nd, 2018, 16:56

Quote:

Originally Posted by halfnelson

Can't remember off the top of my head but always gapped as per Volvo manual.

So 0.65 - 0.7mm then? I'm thinking if the gap was wide it could potentially cause arcing on the dizzy cap terminals, could also be weak HT leads allowing arcing to occur.

Feb 2nd, 2018, 15:43	#12
halfnelson Member Last Online: Jan 5th, 2024 16:03 Join Date: Sep 2009 Location: TRURO	Success! Success! Was the Crank Position Sensor as suggested. Bought one from Classic Swede and - after some contortionism and swearing - swapped the old one out to find the wire had melted through to reveal one of the wires. Thanks for the input __________________ 1976 245 DL Brooklands Green - sold 1992 240 Torslanda Red

Feb 2nd, 2018, 16:04	#13
Laird Scooby Premier Member Last Online: Yesterday 21:06 Join Date: May 2012 Location: Lakenheath	What plug gap are you running? __________________ Cheers Dave Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........

Feb 2nd, 2018, 16:51	#14
halfnelson Member Last Online: Jan 5th, 2024 16:03 Join Date: Sep 2009 Location: TRURO	Can't remember off the top of my head but always gapped as per Volvo manual. __________________ 1976 245 DL Brooklands Green - sold 1992 240 Torslanda Red

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Jan 29th, 2018, 22:40	#11
Nicholas Lewin newish member Last Online: Nov 7th, 2020 23:35 Join Date: Jan 2016 Location: London	Chris Mine has died on me annoyingly twice in the two years that I have had it First time, HT lead fault, so I simply replaced the lot (cold, damp morning) Second time, fuse 6. Already been mentioned in this thread. Modern 'ceramic' fuses are plastic and over time they can shrink and then make intermittent contact - no contact = no fuel pumps = no go! Easy enough to resolve and probably worth changing more frequently than recommended intervals for reliability

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