After letting my 90RR sit out in the driveway under the sun for almost3 years. I started it up in one click with a couple of shots of starting fluid in the throttle body and drove it around the block.

Everything was 'normal' before I let it sit years ago.But now, other than the old mustysmell, I noticed the engine sounds"clickityclackity", and also, all the service lights onthe dash remain on.

I would appreciate any insight on what my vehicle is going through. Perhaps it has to do with the old fuel in the tank?

RON
in Houston

 

I would drain out all the stail gas, replace the fuel filter, put in a tank of high octane gas along with 2 bottles of SeaFoam gas additive.
I would suggest you do a full engine flush to get the crap out of the crank case and repplce all of the other fluids, tranny, coolant, diffs, t/case, brake and power steering fluid. If you do all of that you will have a happy truck again.
Mike