QuestionI disconnected the fuel line on the fuel rail side of the filter and it had good pressure. I want to think that it's something other than the ecu but I just can't figure this one out.
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I have a 1990 Eclipse 1.8 w/manual tranny. It is getting spark but the injectors don't seem to be opening. I opened the ecu and can see no damage. I removed the fuel rail and the injectors and thats how I know they aren't shooting fuel. I have put gas into the intake and it will start. Under the drivers dash is a test connector. I read a manual and it said to get a reading to use a needle type meter and hold the leads to two specific posts. and read the pulses but the needle just pegs out and stays there. The book say that that indicates a bad ecu. What do you think?
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Richard: You almost explained the problem yourself, when you put fuel into the intake the it will start. Your fuel filter could be needing changing or your fuel pump is bad. The fuel system consists or a fuel tank, and electric fuel pump, a fuel pump relay, fuel injectors, an air cleaner assembly and a throttle body unit. Then that computer which puts all that together and sents the right fuel mix to the injectors. Can you hear the fuel pump start when you turn the key on, it only runs just a bit but you can hear it. There could be something wrong with your fuel injection relay, and you can check that by reading your manual. A lot of people and I have sons that do this what with the cost of fuel these days, will run their cars down to "E" but did you know the fuel is what cools the fuel pump? So if you do this enough, you will with time burn out your fuel pump. But give a listen to see if you can hear it, and if not check that relay first. If your car will start when you put the fuel in the intake, I would wait on the computer. If it turns out to be your relay or your fuel pump. Then you could have the car coded at a AutoZone for free and that would show any sensors or a bad computer. But is the check engine light on, or does it stay on? Hope this helps and good luck.
AnswerRichard: Hello. You know if ever there is a war in the states that they shoot off one of those bomb that will kill off all the cars that are made today, the ones with computers. Well that would kill off anything cell phones, computers and the such. But why will you not think it might be your computer. Did you know that Mitsubishi farmed out the making of their computers to another company that did not make very good ones and they stop working.Sometimes they just stop, (working). You said you did that test and it leads to the problem being the computer. The computer controls everything, everything. It gets all it's reading from sensors all around your car's engine and then in a but few seconds it sets up the fuel mix. But you can look for other things it is your car and you can do what you want. But I think it is the computer. Have you smelled the computer does it smelled burnt? Are you sure you got the computer or something else? When you turn the key on your car, that opens a switch that tells the battery to give power to the starter, and that starts to turn the engine but the computer has to get all those readings from many a sensor,my book says this... the ECM receives signals from various sensors with monitor changing engine operating conditions such as intake air volume, intake air temperature, coolant temperature, engine rpm, acceleration/deceleration, exhaust oxygen content, etc. These signatls are utilized by the ECM to determine the correct injection duration. Only other thing try to see if you might have a vaccum leak someplace that might be adding to your problem. But I still think it points to the computer. Hope this helps and good luck!
