captainboo
Active member
Just launched yesterday and after about 30-40 minutes under engine going down the Clyde, revs suddenly decayed slightly accompanied by a loud knocking sound. Reduced to idle and sound still there. Stopped the engine and then sailed the rest of the way down the Clyde with a tow by a friend onto my mooring.
Engine is a mid 80's Ford 1.6 with a Bosch VE injection pump and injectors.
Had to change the pump over the winter due to a leak, replaced with a 'as new' reconditioned unit. New pump installed and timed, pipes bled, and it started and ran fine with no adjustments required. Tried to be as clean as possible when reassembling - injector supply unions covered/pipes cleaned and blown through/new filters fitted/bled extensively to flush through before tightening injector pipes etc.
This was the first time the engine has run under load properly since changing the pump.
Did a quick diagnosis yesterday with the engine at idle by cracking each injector union in turn. No.1 - 3 caused idle to drop slightly but no change to the noise however No.4 didn't change the rpm but the noise dissappears and once tightened the the engine briefly idles normally then the noise returns.
Does this suggest that the No.4 injector is faulty and potentially not closing properly causing excess fuel and hence the knocking? (Have I introduced dirt into the system?) I don't think it is a pump problem because of the way the pump works delivering the fuel and there is no individual adjustment for each injector.
Secondly if the injectors need an overhaul any recommendations for the west of Scotland / Glasgow area?
Intending to go to the boat today and check my diagnosis / remove the injectors.
On the plus side it was a great day to sail down the Clyde!
Engine is a mid 80's Ford 1.6 with a Bosch VE injection pump and injectors.
Had to change the pump over the winter due to a leak, replaced with a 'as new' reconditioned unit. New pump installed and timed, pipes bled, and it started and ran fine with no adjustments required. Tried to be as clean as possible when reassembling - injector supply unions covered/pipes cleaned and blown through/new filters fitted/bled extensively to flush through before tightening injector pipes etc.
This was the first time the engine has run under load properly since changing the pump.
Did a quick diagnosis yesterday with the engine at idle by cracking each injector union in turn. No.1 - 3 caused idle to drop slightly but no change to the noise however No.4 didn't change the rpm but the noise dissappears and once tightened the the engine briefly idles normally then the noise returns.
Does this suggest that the No.4 injector is faulty and potentially not closing properly causing excess fuel and hence the knocking? (Have I introduced dirt into the system?) I don't think it is a pump problem because of the way the pump works delivering the fuel and there is no individual adjustment for each injector.
Secondly if the injectors need an overhaul any recommendations for the west of Scotland / Glasgow area?
Intending to go to the boat today and check my diagnosis / remove the injectors.
On the plus side it was a great day to sail down the Clyde!