Volvo Stalling

Hot start / re start issues are usually the crank angle sensor, or as you say the ignition amp.

Arm yourself with some freeze spray, or brake cleaner aerosol, and the next time it cuts out, immediately spray one item to cool it off and attempt a re start. If you can make it re start at will then you have identified the problem.

My money would be on the CAS though.

Tim..

It would be nice if it was the CAS - didn't really think of that as I sort of expected it to either work or not! That's only 20 quid from Eurocarparts so might be worth a dabble.

Well...

Replaced the CAS and the ignition amp. Started fine and then cut out at the end of the road - exactly the same - tacho drops to zero instantly and the engine is dead - a couple of minutes it started fine and away as smooth as ever...

Any more thoughts? It's getting personal now :-)

Yes, two thoughts:

a) The main relay is faulty, or battery feed to it or after it is intermittent- most likely the relay though- the ECU is thus dead. Often a dry joint opens up as it warms up. These are well documented with Volvo fuel pump relays!

b) You still have a fault on the primary trigger to the ecu- i.e. the CAS or its wiring. Could be the connector being subject to engine movement??

To rule out a) connect up a test lamp between relay output to ecu and earth, which should be lit at all times the ignition is in pos II. Next time it dies, you can verify the ecu is still powered.

Tim..

It was that very thing - bloody relay. Took it off and soldered all the joints and it's good as gold (touch wood).

Cheers Tim.

Marvellous, glad you got it sorted. You can look forward to another 100k or so of reliable running now ;)

Tim.

Hoping so!

Cheers for the assistance.