Gotta tell you. This can be very challenging as water and electronics don't mix well. And even when you get it running, you are likely to have electrical "gremlins" down the line.
Electrical contact cleaner in EVERY electrical connector for every engine management sensor, and all electrical connection is a good start. This stuff is available anywhere, even Wally World.
New distributor cap and TPS.
The 90 and earlier ECUs are not waterproof... they are under the dash, it's the big aluminum box over the gas pedal. Remove it, carefully disassemble, only handle the circuit board by the edges. You'll want to clean it somehow if there is a significant amount of residue on it, if it has corroded you get to replace the ECU entirely. I suggest rinsing it off with isopropyl alcohol (rubbing alcohol is a good substitute) then allowing it to dry thoroughly.
I thought WD-40 was a bad idea for electrical connections?
IIRC, it does displace water, but leaves a film over the metal contacts (to keep displacing the water). On electrical contacts this creates more resistance in the circuit.
You will more than likely run into MORE electrical gremlins down the road if you use WD-40. Electrical contact cleaner is all you should be using.
Thats exactly what I have done but I think it is fried. do you know anyway to test it. i don't realy have the money to start throwing parts at it.The 90 and earlier ECUs are not waterproof... they are under the dash, it's the big aluminum box over the gas pedal. Remove it, carefully disassemble, only handle the circuit board by the edges. You'll want to clean it somehow if there is a significant amount of residue on it, if it has corroded you get to replace the ECU entirely. I suggest rinsing it off with isopropyl alcohol (rubbing alcohol is a good substitute) then allowing it to dry thoroughly.
Thats exactly what I have done but I think it is fried. do you know anyway to test it. i don't realy have the money to start throwing parts at it.
Yeah, those stupid Jeep engineers and their bad ideas. They should have anticipated that these things were gonna be used for submarines someday. They sure had their priorities all messed up mounting the ECU the way they did.
places for water to pool are generally a bad idea, things like condensation can wreak havoc on electronics if there is nowhere for water to go when it collects. look at the later model ECUs in the engine bay, they are not sealed but have drain holes in the bottom and vent holes on the side