Quote:
Originally Posted by Aquaticedge
Hope one of you can point me to the right place. This truck runs fantastically when its warm. when it first fires off it runs like hell, like a choke is sticking. anyone familuar with this engine enough to tell me what to look for? It's been 16+ years since i've fiddled with a Carburetor
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Those Mitsubishi engines use a 2V Mikuni carburetor, with an unusual choke design. Instead of a bi-metal spring, it uses a coolant-heated pellet, like that used in a coolant thermostat, to slowly open the choke flap via a gear-set. What typically happens is the choke pull off diaphragm fails. Then the carb runs extremely rich until the choke eventually opens. As I recall, there's an anti-tamper cover riveted in place, and you need to drill/cut the rivet(s) before you can work on the choke actuator assy. If you're lucky, you can still get a carb-kit, with the CORRECT pull-off diaphragm assy included. I got a kit years ago for one of these that had the right diaphragm attached to the wrong link, so I wound up disassembling and transferring the new diaphragm to the original link. Also there's a bendable adjustment in the linkage that I would adjust towards the lean side.
Otherwise, you would need to disable or remove the automatic choke actuator and rig up some type of manual-choke cable.
Or at least prop the choke partly open so you don't flood and load up the oil with gas. The cam in this engine spins directly in the aluminum head, without any replaceable bearings. You don't want to compromise it's lubrication!
Hope this helps.
Happy Motoring, Mark