Signs of misgaped spark plugs

check coil wire--distributor /dist cap

https://www.youtube.com/watch?v=FiqAIUkWzeI

https://www.youtube.com/watch?v=PYEtZb5JwSY

Inspect the spark plugs for signs of damage. Use a spark plug socket to remove the plug so you can get a good look at it. The damage you see will help you determine the cause of the misfire. If the spark plug is just old, replacing it may solve the problem. Make sure to replace and properly gap new spark plugs.
https://www.wikihow.com/Fix-an-Engine-Misfire

I'm sorry to hear that you're having trouble with your 1989 Mitsubishi Eclipse. Here are a few things that you can check to try to get spark to the spark plugs: Check the spark plug wires: The spark plug wires can become damaged over time, which can prevent spark from reaching the spark plugs. Inspect the spark plug wires for any cracks or breaks. If you find any damage, replace the spark plug wires. Check the spark plugs: The spark plugs can also become fouled or damaged over time, which can prevent spark from reaching the spark plugs. Remove the spark plugs and inspect them for any damage. If you find any damage, replace the spark plugs. Check the ignition coil: The ignition coil is responsible for generating the spark that ignites the fuel in the engine. If the ignition coil is faulty, it can prevent spark from reaching the spark plugs. Inspect the ignition coil for any damage or signs of wear. If you find any damage, replace the ignition coil. Check the distributor cap and rotor: The distributor cap and rotor are responsible for distributing the spark from the ignition coil to the spark plugs. If the distributor cap or rotor is faulty, it can prevent spark from reaching the spark plugs. Inspect the distributor cap and rotor for any damage or signs of wear. If you find any damage, replace the distributor cap and rotor. If you have checked all of these things and you are still not getting spark to the spark plugs, it is possible that there is a problem with the engine's computer. In this case, it is best to take the vehicle to a qualified mechanic for diagnosis and repair. Here are some tips to help prevent these problems from happening in the future: Change your spark plugs and spark plug wires according to the manufacturer's recommendations. Keep your engine clean and well-maintained. Avoid running your vehicle on low fuel. If you notice any problems with your vehicle's performance, have it checked out by a qualified mechanic as soon as possible.

Smoke is not a good sign. Running rough is not a good sign. Oil light not a good sign. You could have a combination of bad things, most likely expensive. Suggest professional help. Smoke can be bad rings or holed piston. Low oil pressure can be bad bearing or oil pump.

The engine Family you have is know for having coils go bad. If you can get the truck scanned to see which cylinders are misfiring. If not, First I would remove all coils and spark plugs and Inspect. If you have found bad Spark plugs Replace with a high Quality plug. Double Platinum at a Minimum. I would not use Champion plugs. I have never had good luck with them in Fords. Look closely at the coil to spark plug boot. if you see any signs of arcing , White looking or burn marks that is a sign that you have boots letting Ignition spark arc to ground before reaching the spark plug. You can get replacement boots Aprox 4.00 each or there is a complete set. Look closely at the coil pack for any signs of cracking, arching, white residue, burning. that would be a sign of a bad coil pack.

Distributers are very common for failing in these cars, when the car wont start, pull a spark plug out leave the wire connected and place the threaded portion of the spark plug on some metal on the engine. Get a friend to turn the key, look for spark between the gap on the spark plug, if no spark, signs point to bad distributer

It sounds like you had either mild lifter lash or a plug wasn't gapped properly at first which has now gotten even worse. The gas smell that you have may be caused by a plug not firing due to misgap or a lifter that isn't functioning due to breakage. I recommend parking your vehicle as soon as possible. Have it towed to a dealer or trusted repair shop if at all possible. More use of the vehicle may cause irrepairable/ more costly damage.

remove the spark plug lead from the plug, blow out any dirt etc from around the plug, undo the plug and remove from the vehicle, make sure the plug has the right gap setting before installing into the engine.
Check each plug that you remove for any sign of a wet or oily plug which are signs of more serious problems.
If all the plugs are dry with just a light brown carbon deposit on them they are firing ok.
Hope this helps

hey, mad legend, have u checked for spark and gas yet? If not, that's the 1st thing to do. To check for spark, u can use a spark plug u took out recently when u changed the plugs. Disconnect a plug wire at plug, plug into used plug, place where u can see tip of plug easily, have someone crank engine over, u should see a good spark at plug tip. To check to see if it's getting fuel, attempt to start several times, pull a plug and check it, tip should show signs of fuel. If it's dry, no sign of fuel, u may have a fuel pump issue.