Volvo Owners Club Forum - View Single Post - '87 740 Turbo: Cuts out and will not restart for 40 min

Jul 23rd, 2004, 13:15

Thanks for the feedback so far.

I have dismissed the possibility of fuel pump problems for the time being, though next time it goes in for a service I'll get them to check. The car currently has half a tank of fuel but still dies when warm; it also doesn't show any other signs of fuel supply problems - according to a few volvo mechanics I've spoken to - poor running etc.

A friend has resoldered some of the joints in my ignition amplifier, it is the older style, contained in a black aluminium box (shown here to the left of the battery - mounted on the wheel arch)

http://www.zen15787.zen.co.uk/car/ig...amplifier1.jpg

I'll fit this later and see if I can still recreate the problem.

Below is a picture of the flywheel rpm/tdc sensors mounted on top of the bell housing. On this model there are two and they are apparently more expensive than the single rpm sensor fitted to the later models: £141 +VAT each ... ouch. I hope it's not these. If so is it worth going for second hand rather than forking out £330??

http://www.zen15787.zen.co.uk/car/rpm-sensor2.jpg

And their connectors coming off the loom running along the firewall:

http://www.zen15787.zen.co.uk/car/rp...connectors.jpg

Below is a poor picture of the (intake) side of the distributor, if it had the hall sensor I'd think it's connector or wires should be visible here.

http://www.zen15787.zen.co.uk/car/distributor1.jpg

I'll also look into the ECT and it's earthing as a possible cause, as suggested by Keith.

The fuel pump relay (which has been replaced as a precaution) is the white one. This should be correct (I hope so) as it was sold to me by a volvo dealer when I gave them the year/model.

I am restricted by tools, time, space and knowledge but hope to get to the bottom of this soon - While the problem exists I can't risk the 5 mile trip through central London to the mechanic I usually use. Thanks again for the advice and ideas so far.

Ian

PS The rpm/tdc sensors have yellow bands, I have read that the later ones had white bands and were more reliable does anyone know or can anyone confirm if they are interchangeable?

http://brickboard.com/FAQ/700-900/El...wheelSensorBad

Jul 23rd, 2004, 13:15	#7
ianp Guest Location:	RE: '87 740 Turbo: Cuts out and will not restart for 40 min Thanks for the feedback so far. I have dismissed the possibility of fuel pump problems for the time being, though next time it goes in for a service I'll get them to check. The car currently has half a tank of fuel but still dies when warm; it also doesn't show any other signs of fuel supply problems - according to a few volvo mechanics I've spoken to - poor running etc. A friend has resoldered some of the joints in my ignition amplifier, it is the older style, contained in a black aluminium box (shown here to the left of the battery - mounted on the wheel arch) http://www.zen15787.zen.co.uk/car/ig...amplifier1.jpg I'll fit this later and see if I can still recreate the problem. Below is a picture of the flywheel rpm/tdc sensors mounted on top of the bell housing. On this model there are two and they are apparently more expensive than the single rpm sensor fitted to the later models: £141 +VAT each ... ouch. I hope it's not these. If so is it worth going for second hand rather than forking out £330?? http://www.zen15787.zen.co.uk/car/rpm-sensor2.jpg And their connectors coming off the loom running along the firewall: http://www.zen15787.zen.co.uk/car/rp...connectors.jpg Below is a poor picture of the (intake) side of the distributor, if it had the hall sensor I'd think it's connector or wires should be visible here. http://www.zen15787.zen.co.uk/car/distributor1.jpg I'll also look into the ECT and it's earthing as a possible cause, as suggested by Keith. The fuel pump relay (which has been replaced as a precaution) is the white one. This should be correct (I hope so) as it was sold to me by a volvo dealer when I gave them the year/model. I am restricted by tools, time, space and knowledge but hope to get to the bottom of this soon - While the problem exists I can't risk the 5 mile trip through central London to the mechanic I usually use. Thanks again for the advice and ideas so far. Ian PS The rpm/tdc sensors have yellow bands, I have read that the later ones had white bands and were more reliable does anyone know or can anyone confirm if they are interchangeable? http://brickboard.com/FAQ/700-900/El...wheelSensorBad