changread Posted July 10, 2011 Share Posted July 10, 2011 Hi at tickover about 700rpm the engine is lumpy down 400/500 rpm then back to 700, also in drive coming to a halt the engine almost stops then back to 700 rpm. Every thing else is normal starting from hot/cold running very smooth as the v8 always is. Anybody help Thans Mike Quote Link to comment Share on other sites More sharing options...
teabag Posted July 10, 2011 Share Posted July 10, 2011 Check the idle control valve (stepper motor) at the rear o/s of the plenum chamber remove clean with brake cleaner and replace, also check the vac/breather hoses for leaks. Quote Link to comment Share on other sites More sharing options...
Les Henson Posted July 10, 2011 Share Posted July 10, 2011 You see - diesels don't do this. Cooking oil, kebab meat, waste KFC S***te, old engine oil, etc - don't do this. Diesels will run on anything - and save the planet at the same time. Les Quote Link to comment Share on other sites More sharing options...
changread Posted July 11, 2011 Author Share Posted July 11, 2011 Check the idle control valve (stepper motor) at the rear o/s of the plenum chamber remove clean with brake cleaner and replace, also check the vac/breather hoses for leaks. Thanks for the info realy usefull i will give it a go but could with a bit more info to help along,is it the bit with multy pin plug in? when i unbolt it what does washing out do? Mike Quote Link to comment Share on other sites More sharing options...
teabag Posted July 13, 2011 Share Posted July 13, 2011 Thanks for the info realy usefull i will give it a go but could with a bit more info to help along,is it the bit with multy pin plug in? when i unbolt it what does washing out do? Mike It just that the servo part can gets 'gum up' therefore won't operate to its full extent, just unplug and unscrew taking care of the fibre washed, spray and put back just a five min job. You could also try a whole bottle of injection cleaner in your fuel. Quote Link to comment Share on other sites More sharing options...
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