you can measure the fuel pressure by unscrewing the temperature sensor on the fuel pressure requlator and using a push fit compression tester, does it reach 4 bar and how quickly it does is important (should be immediate),

Took the Speedo out to fit new LEDs bulbs, loosened the 3 screws but didn't remove before I realised the bulbs could be pulled out . Refitted the Speedo but now at rest Speedo reads 20mph , when driving Speedo works fine but over reads by 20mph at all times Any ideas what I have done wrong and...