How to remove crankshaft sprocket 91 mighty max

SOURCE: 91 mighty max hard starting then runs great, always hard starting

could be coolant temp sensor

SOURCE: Crankshaft Woodruff Key Removal

You are correct, this key does drive both. While I have never tried to remove the keway with out both pulley and lower sprocket you may be able to (my gut says no but anything is worth trying once) I'd position the keyway at the 12 o'clock postion and with a good pair of needle nose pliers see if the key will roll out as you pull up and away with it. If it will not you'll of course have to remove the front of the engine and pull the timing belt, if over 60K miles on belt go ahead and replace with new.

I hope this may have assited and good luck!

Tom

SOURCE: LOOKING FOR TIMING SPROCKET MARKS ON 1995 MIGHTY

If it is the 3.0 liter V6 there is a notch in the timing belt crankshaft pulley which aligns with a small mark above in the casting at the 1:00 position or so. As for the cams, each sprocket has a dimple in it which aligns with a vetical mark pressed in to the back steel dust covers.

I hope this may have assited,
Tom

SOURCE: put in distributor for 1991 mitsubishi mighty max

Please confirm which engine your truck has; 3.0 V6?

Thanks,
Tom

SOURCE: 91 mighty max wont start when cold

Next time when cold and it will not start remove a spark plug or two and see if the engines flooded. If so there are two things that come to mind; 1, worn injectors, leaking as engine sits with time causing difficult starts 2: bad oxygen sensor, if failed engines tend to run rich and the ECU may have your injectors pump heavy amounts of fuel to keep from running lean; often times you'll see poor fuel MPG if O2 sensor failed.

I hope this may have assisted you,
Tom