So to today.
I started with high hopes
This is the Volvo unit. Despite different part numbers, it has all the ports in the right place and takes the bolts from the golf one no bother.
I got the bolts all swapped over and fitted the unit to the car
You can see how the Volvo bolts look considerably less crusty than the golf ones
With it all fitted and tightened up (including injector 4 in a test bottle) ...
There was no fuel in the test bottle, and I could only hear the pumps running intermittently.
Time to turn my attention to the fuel pump relay. Logic being that the metering head needs to be able to provide 75psi to the injectors to get them to open.
The lack of any fuel in the test bottle suggests we are not getting sufficient fuel pressure at the metering head.
This could be either due to the fuel relay being intermittent, or the main pump not providing pressure.
Tucked up in the passenger footwell, the relay is easy* to reach.
Initial inspection showed signs of rusting - never good
After some gentle persuasion with a screwdriver, the relay was out
Time to order a new one then.
As a final hurrah, it also decided that it'd like to make some horrible noises when the starter tried to engage..
I think the battery may just be getting tired.
So, where are we?
I'm of the suspicion that:
1. Still have a starter/ignition switch issue
2. The metering head(s) are seeing insufficient fuel pressure to operate.
Next step will be seeing about a new relay (possibly even a new fuseboard) and testing that.
I'll likely pull the starter too.
Onwards and upwards.