Idle speed oddness!!

My 110 TD runs well sweet, but after revving the idle speed sometimes takes ages to get down to normal & sometimes it's ok? Anyone got any ideas before
i start prodding?
Ta
Nige
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Nige wrote:

Lubed the linkages & it's now fine!!! Bloody steam cleaning!
--
Ta!

Nige

Subaru WRX (54)
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nige .
if you see the small spring loaded linkage/lever at the very front of injector pump, on the top of pump next to the plastic fuel pipe union .
this has an 8mm locknut and adjuster .
youll notice if you push the lever back the revs will rise .
to adjust the idle down and allow the revs to drop freely and quickly you need to undo the 8mm locknut and undo the screw on this linkage so the lever closes the gap between itself and the pipe inion , youll see the revs drop anyway when unscrewing the screw..
when adjusting this linkage though the revs may well drop too low making engine cut out , so if you want to stop this happening when you adjust this back by a fair amount you also need to adjust the main throttle linkage at the same time [bit by bit ] to increase idle revs back up again .
the main throttle link has a 10mm locknut and screw , you adjust the revs up with this in conjunction with unscrewing the small linkage thats making revs drop .
once youve backed off the small linkage and adjusted the main linkage to give you the desired idle speed again you will see that when you rev the engine up by moving the main throtle linkage , the revs will drop back relatively quickly and down to idle speed .
when trying to undo the 8mm locknut , hold the bracket of the small linkage with pliers of grips, the bracket isnt very strong and bends easily .
i dont know a lot about the lucas inj pump but i think the small linkage at front of pump is also a fuel metering adjustment for emmissions .
my landy 2.5na was not dropping the revs properly when throttle released and it still revved a bit when i came to traffic lights etc , so i set about adjusting the pump as per above and its all fine now and runs properly .
id also noted before adjustment that i had black smoke from exhaust a lot of the time but after adjusting the small linkage and readjusting idle on main linkage i now dont see that smoke .
hope this helps as ive not seen any replies or info relating to adjusting fuelling etc on lucas injector pumps as used on the 2.5TD and N/A engines 12j & 19j
cheers. ian .
Nige wrote:

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You got Mail Derek
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