Mitsubishi Repair: Mitsubishi 6G73 2.5l severe sag, hesitation intermittent stall, bosch platinum, obd ii

Question
1996 Sebring Convertible with Mitsubishi 6G73 2.5l vin H

Severe sag, hesititation and occasion stall after I paid a mechanic to  do plugs and wires.

Champion Plugs put in a few days before the stuff below, was advised that only these plugs should be used. They replaced the ones that the  mechanic shop installed. They installed Bosch platinum.

Noticed that there was oil all over the bosch plugs, so to be sure the new Champions  wouldnt foul out, I did the valve cover seals and  gaskets. While I was in there and everything was torn apart, I decided to replace the EGR valve, cap and rotor. The EGR valve, cap and rotor are all
mopar. Champions also came from Mopar.


well the car is doing the same thing ... I needed to all of this  anyway, but my work did not correct the issue.

The car runs ok for about five minutes.
Gradually, hesitation increases. As it increases idle becomes irradic.
Eventually (probably after 7 or 10 minutes), when stopping at a light  or stop sign, intermittently rpms will drop very low, the Oil light  comes as the car stalls or it comes back up to about 7 or 8 hundred rpms.
If it stalls, its hard starting it again, but it does go over after a few tries. If it doesnt stall, and I step on the gas to pull away, I get a "dead spot" ... hit gas but going no where. spitting sputtering ...

The check engine light is NOT illuminated .... but put a OBD II on just  to be sure cel is working.
No codes.

Now, I should also mention that the fuel lines are severely rusted and  I cant be sure when the fuel filter was changed last. Car came from the  north, although I live in the south.
I believe Im getting spark else she would turn over, right ?

One other thing to note is that while I was putting one of the rearmost  valve covers back on, I leaned on the source hose connected to the  fuel rail and snapped the plastic end of the hose off. Now this was really no big thing as I had a new replacement, but the fuel didnt squirt out  as to be under pressure at all. It just trickled and dripped out.

Not sure what else to look at, although I have the car on jacks so that  I can replace the fuel lines (have OEM set from a wreck I bought) and  the fuel filter. These lines need to be replaced anyway, so I MAY be  able to at least rule fuel line and filter out.

Any ideas, am I going in the wrong direction ? What should I be looking  at ... and I hope you dont say the distributor (although I have one of those from the wreck also)  

Answer
Chris: You know that your car, its engine and its computer all goes together. If you were to replace the computer then you would need to make sure that you replaced it with the right computer for your car and its engine. Not a computer out of a friends car that seemed right but did not fix your problem. If you do buy parts from a junk yard, you need to make sure they really DO go with your car. As for the distributor, I would buy a new one. Old ones off junked cars, will still be tracked. In that distributor cap is a crank sensor for your car. And you need to make sure it is the right one and will work with the computer as it should be. I would say your problem sounds like the fuel pump, if you can replace all the lines that next step would be the pump but again buy a new one. It is a big job to replace that, and putting in a used one will mean you will be doing it again right soon down the road. As the fuel is what keeps the pump cool and a lot of people are running their cars down to empty before filling them up. Been replacing a lot of fuel pumps due to the cost of fuel. Again I would replace the fuel filter with a new one too. When replacing the distributor cap put in a new rotor also. Some parts you need to replace with new ones. I mean things like distributor caps and rotors do break down with use and time. And so should be replace with new parts. I don't think they will cost that much for your car. If you still have your problems with your car, I would think about a new computer.As you know that Mitsubishi farmed out the building of their computers to another company that did not build very good ones.With time a piece in that computer will start to leak into the computer and will kill off the computer. So if you keep buying used ones, you could just keep getting this bad computers. So I would spend the money and buy a new computer. Not a used one. I hope this helps and good luck! Linda