Mitsubishi Repair: Overflow of petrol, mitsubishi galant, nissan march

Question
Dear Linda,
I posted a few days ago a question to Antony and i asked for a follow up but he is not available now, so I decided to come to you. Please see below the answered question:


Answered Question


Subject   Mitsubishi Galant, 94 engine cut while driving
Question   Hi Anthony,
I have a Mitsubishi Galant, 1994, engine 4g93, chasise52a, automatic, a short series as I have been told. It runs perfectly for the last 4 years with the normal maintenance.
All started 4 month ago when the computer (due to a condensator leaks) stopped the engine. As a new one is hard to find in NZ (and expensive) I found a guy specialized in fixing computers. He fixed it and the car worked well for 2 weeks. Now, the engine started to be cut suddenly while driving, first days/weeks 1-2 times per day and finally (after 1 month)after few hundreds meters (driving). It could be started again after 1-2 minutes of waiting, but starts hardly;
I had the car checked by 3 Car stations including MITSUBISHI DEALER in Auckland but nobody was able to find out what is wrong, they just charged me for labor (I paid until now about NZ$800). I replaced the Distributor cap and coil, plug sparks, all filters.
Also, the error shown by the diagnose tool shows an error no 64, which is an overflow of petrol and you can feel the smell when you try to restart the engine after it stopped.
A friend of mine had the same problem but with a Nissan March and he found the problem being an Relay under the dashboard. I had a look at my Mitsubishi and I found 3 Relays under the wheel/dashboard/. I found one being for hazards lights and the other two for "Power?" (It’s a serial no: MB629080156700-0110).
I noticed that when the engine is cut if I turn the ignition key few times without to ignite, there are few clicks in one of these relay and after that the engine starts.
Not sure if I have been too clear (English is not my first language) but if you can give me an advice I would appreciate it a lot.
PS I have the assurance the computer works well.
Also 2 of my friends which had before Mitsubishi had computer problems and after that they couldn’t fix the car anymore (even with a new computer).

Best regards,
Adrian


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Answer   Adrian,
This issue may be caused by a fuel injector not flowing properly or even a vacuum leak in the intake system or an emissions line.  Unfortunately, only a mechanic working on the vehicle directly would be able diagnose the problem.  I'm sorry to hear not even the Mitsubishi dealership could figure out the problem.  If you suspect it may be one of the relays under the dash, those are relatively and easy enough to replace.  You can ask mechanic to specifically test your fuel system and correspoding components, which may reveal the cause of the problem.  Sorry I couldn't offer more help.
Good luck!

Now: since I received the answer I have changed the relay and the Airflow meter (as a mecanic sugestion) but the engine still run for a minute and stops.
What I have discovered is that after it stops when I unplug all injectors plugs the engine starts fine and run until the small amount of petrol run out. After I replace the plugs it starts finely and run for a minute or so and stops due to (I now now for sure) an overflow of petrol (the sparkplugs are wet)
Could you please give me any sugestion?  

Answer
Adrian: After reading in my book, it says that the injection uses timed impulses to inject the fuel directly into the intake ports of each cylinder. The injectors are controlled by the Electronic Control Module(ECM); your computer. I do not think it was fixed right or maybe not put together right. Those clicks you talked about; sounds more like the computer to me, then a relay. Are you sure you got the right computer back from the guy that fixed your's. You have to put the right computer that goes with your car, back into your car. Or else it will mess everything up. I had a guy that bought this car in, he had been having problems I told him it was his computer. But he did not get his old one rebuilt but rather went to a junk yard and bought a different one. It really messed up his car, and so could be something like this happens to you. I still think it all points to the computer in your car. It controls everything. Then I will try to see that what that code for 64 is for sure. And will get back to you in a few days. You should replace that sensor whatever it is. Cars now days are run by these computers, your computer go bad and your car will not run. It takes three things for a car to run right; air, stark and fuel. But it takes the computer to put all those things together so that the car will go down the road. I would have your computer tested again, because I think there is still something wrong with that. Or else the guy that worked on your's got it mixed up with another one and you got the wrong computer in your car. I shall get back to you in a few days, but mean while I hope this helps and good luck!