Well that was unexpected……
- Jul 26th. 2016
- By mapw
After fitting another UEC, the non start issue where the fuel pump was not getting a 12v feed appeared to have been solved. Certainly for around 4 months, until it reared its ugly head again.
With a direct feed to the pump, the pump ran so again no issue there with the fuel pump itself. So the next thing was to remove the UEC and take a look. Upon inspection, X2 pin 56 in the UEC (fuel pump feed) was showing signs of corrosion which was not there previously. Swapping the UEC to another car proved that the UEC was not at fault and was working fine, which then suggested an issue within the wiring somewhere. Luckily Vauxhall/Opel factory wiring diagrams make it easy to identify what goes where within the UEC and associated plugs. Read more
