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Replaced fuel filter, fuel pump, fuel pump relay switch, distributor cap and rotor button plus coil wire from distributor. It starts just fine but will shut off while driving after it gets warmed up.
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What is or was the main issue & when did it start
& under what conditions ?
Does the thermostat open ?
Does it reach 195 or more coolant temp?
Does it go into Closed Loop? (Oxygen Sensors
in control of fuel)
Any OBD Codes in any system?
Fuel Pressure Correct as well as Volume
& under a load while driving
Sounds like you were going to say it only has a problem
AFTER it reaches operating coolant temp
SO- none of what you did appears to be related
First-- you find & resolve all problems. THEN do your
Preventative Maintenance-spark plugs,filters,etc.
Check or test the switch on the transaxle, that is for gear
selection,whatever you have there
May be the only problem you ever had or one of two problems
Only runs when cold-- in park only?
Won't run hot or cold-- in ANY gear?
Can you even drive it at all?
How about an Idle air control solenoid/valve
on or near the throttle body-got one of them?
I'm assuming you replaced the fuel filter when you did the pump. You'll have to try to figure out if you are loosing fuel to the injectors or spark to the plugs to proceed. Its possible something is failing inside the distributor among other things. I'm also assuming you have checked the computer for trouble codes.
I believe that motor still uses a distributor cap, rotor, and seperate coil...it has to be no spark...inspect the cap and rotor for hairline cracks...remove the coil, (Connected to center wire on distributor cap) and have tested...Hope this helps.
You've already eliminated the spark plug & wireset, distributor cap & rotor. Sounds like your car needs a tune-up, specifically, the PCV (positive crankcase ventilation) valve, and/of the EGR (Exhaust Gas Recirculation) valve.
Components checked/replaced during a tune-up are: air filter motor oil motor oil filter breather filter fuel filter(s) fuel strainer PCV valve EGR valve spark plugs spark plug wires ECM or distributor cap & rotor cabin air filter transmission oil filter transmission oil engine coolant check all vacuum hoses and lines
Troubleshooting the no-start condition - from the 1990 Mitsu Mighty Max Repair Manual:
Priority Action Part Type -- Cause 1 Inspect Battery -- Battery Discharged or Faulty. 2 Inspect Battery Cable -- Corroded, Broken, Shorted or Poorly Connected Battery Cable. 3 Inspect Distributor Cap -- Distributor Cap Cracked or Burned. 3 Inspect Fuel Filter -- Clogged or Dirty Fuel Filter. 5 Inspect Ignition Coil -- Faulty Ignition Coil. 6 Inspect Wireset -- Worn, Damaged or Faulty Spark Plug Wire(s). 7 Inspect Spark Plug -- Incorrectly Gapped or Fouled Spark Plug(s). 8 Inspect Starter -- Starter Motor Faulty. 9 Inspect Fuel Pump -- Low Fuel Pressure. 10 Inspect Solenoid Switch -- Faulty Starter Solenoid Switch. 11 Inspect Fuel Pump Relay -- Faulty Fuel Pump Relay. 12 Inspect Fuel Injector Pressure Regulator -- Faulty Fuel Injector Pressure Regulator. 13 Inspect Ignition Switch -- Improperly Connected or Faulty Ignition Switch. 14 Inspect Starter Drive -- Faulty Starter Drive. 15 Inspect Fuel Injector -- Dirty or Worn Fuel Injectors. 16 Inspect Fuel Pump Strainer -- Clogged or Dirty Fuel Pump Strainerat. 17 Inspect Engine Control Computer -- Incorrect Operating Information Being Delivered and Sent From The EEC. 18 Inspect Fuel Tank -- Fuel Tank Empty. 19 Inspect Carburetor -- Carburetor Flooded or Faulty Choke. 20 Inspect Distributor -- Worn, Loose, or Incorrectly Installed Distributor.
sounds like you have an electrical problem, get a diagnosis, and see if all your fuses and everything are all getting power, and if they are, then try replaceing the rotor on the distributor cap
Check for a bad distributor cap and or rotor..........a bad cap and or rotor can caues firing (cross fire)across the terminals and introduce spark to the wrong cylinders at the wrong time....... hope this helps.....good luck!
Sounds like bad distributor cap or rotor. If ones bad, might as well change both. Take off the cap and if there is a black color on the ends of the prongs, or on the end of the rotor, time to replace. Is it getting fuel into motor?
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