Ok, so i have a 1990 250 with a 351 EFI emissions deleted setup. I had drove it around and warmed the engine up knowing i was going to pressuer wash the engine bay. During the wash i let the truck sit and idle so it would maintain temperature and evaporate water as i washed it. It ran fine, didnt spit and spudder as i washed the engine bay. So, i shut the truck off and continue washing the rest of it, i washed the frame rails and other parts near the engine bay. I finished with the back of the frame and exhaust tips. I was a little careless around the tips and could have gotten water into them, but i dont think that would mess anything up. I go to start it to blow the excess water that had gotten into the exhaust out. It fired right up, ran for about 30 seconds then just died. No warning, just like i shut the key off. I go to restart the motor and it would occasionally fire, so i tapped the throttle which has been done for awhile because of its age. Fired up but worked to get up to idle speed. I got it up there, let off the throttle and it just shut off. So, i finished the rest of the truck, and started it, ran it at roughly 1k for a min to see if it would evaporate whatever ailment has upset it. Let off the throttle and just fell from 1k to zero. No subtle fall, just quit like i shut the key off. Decided to take and drive it around to see if it would benifit me by having flowing air. No, it acutally backfired a few time when i was going up a hill and would die when i hit the clutch to shift if i let completely off the throttle. Im at a loss here. No CEL's already did the OBD-1 tests and came up with nothing. Could i have ruined the TPS? or could it be something else?

 

That is a distributor motor, isn't it? Pull the cap and blow it out. Also check all the plug in on the harness, could be wet or sprayed apart.

 

And the lightbulb comes on... I never could have thought the distributor would be an issue, but now that you say it it would be...

 

And that is why you don't do that. De-greaser and low pressure water or a steam cleaner.

Anyway. Undo your electrical connections one by one without breaking them and spray with WD40. Most likely the dizzy, coil, or computer would be my guess.

Adrianspeeder

 

When you lift the distributor cap, check it carefully for cracks and carbon tracks.

 

i think im going to replace the cap anyway, i think it's the original with over 100k on it...

 

Think it might be time for a rotor, plugs, and wires too?

 

already did plugs, I didnt have teh cash at the time to do a complete tune up.

Im going to go today and clean all the injector connections. I didnt get any results from cleaning the cap and rotor.

 

Distributor as many have said, Then plugs and what not those are the problems I usually have

 

well, got a new cap and wires. seems to have cleared up...time will tell.