Originally Posted by OAP Pete

Your by passing a TEST.....While its cold...set up the Test ive wrote on the 5th injector plug...cold engine there should be 12V at the Plug on cranking....if not then there is a Fault and if wont start...so more tests to be made..ie...Black/yellow wire at 5th plug must be live on cranking engine..OK...IF OK then it will be the negative for the injector missing...this negative come from the Timer rear of engine [ colure brown/white..OK...so putting short wire into the brown/white terminal...other end to earth BE VERY VERY SURE TO PUT THE TEST WIRE INTO THE BROWN/WHITE terminal ONLY,,,,,,SEVERE DAMAGE WILL RESULT IF NOT ...is now the negative there on cranking...OK...so there is a fault in the Timer. thats the full test of the fifth injector.... pushing the metering flap...by-passes the test..as your putting some fuel [ not enough ] into the cylinders. getting the voltage tests as explained first......if all OK....then injector could be blocked.....needs to come out and tested for spray of fuel............... Peter