1993 Mitsubishi Eclipse injector trouble

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1993 Mitsubishi Eclipse injector trouble - 2/10/2008 3:10:30 PM    jlgma   Posts: 11 Joined: 2/10/2008 Status: offline Hello all, I am new in this forum and could use some help I have a question I hope someone can maybe help me with. I just bought a 93 mitsubishi eclipse with a 1.8L non turbo car. The trouble I am having is when you start the car it floods out #2 cylinder (but keeps running)so much gas it will run out of the exhaust. I  tested the #2 injector plug with a noid light and it stays on (no blinking) all the rest seem fine. I replaced the fule injector. What do you think. No check engine light come on in car.  What should I try next? Do you think it could be the ECU? I hope someone can help me out. Thank you, Joe Post #: 1

RE: 1993 Mitsubishi Eclipse injector trouble - 2/12/2008 7:19:03 AM    dsm1990gsx Posts: 2051 Joined: 10/22/2007 Status: online If the noid light is staying on, you might have a shorted wire somwhere that is keeping the injector on.  Did you ohm all the injectors?  Check to see if #2 is in spec. < Message edited by dsm1990gsx -- 2/12/2008 7:24:08 AM > _____________________________ 2003 Ford Escape old ladys car 1998 Svt Contour dd 2007 Jeep Wrangler power wheels daughters car...soon to be converted from 12v to 24v (in reply to jlgma) Post #: 2

RE: 1993 Mitsubishi Eclipse injector trouble - 2/12/2008 10:32:50 AM    jlgma   Posts: 11 Joined: 2/10/2008 Status: offline Yes I ohm'ed all injectors and they are all within spec. With a grounded wire would that be within the wire loom or somewhere else? Can I ohm the plugs for the fuel injectors? If so what should they read. Thank you, Joe (in reply to dsm1990gsx) Post #: 3

RE: 1993 Mitsubishi Eclipse injector trouble - 2/13/2008 11:44:54 AM    jlgma   Posts: 11 Joined: 2/10/2008 Status: offline Ok I did a check on the plugs to the injectors with an ohm meter and the one that is not working only shows 4 ohms and the working ones show 40 ohms. Does this mean bronen wire somewere or could it still be the ECM? Please help, Joe < Message edited by jlgma -- 2/13/2008 12:39:54 PM > (in reply to jlgma) Post #: 4

RE: 1993 Mitsubishi Eclipse injector trouble - 2/13/2008 5:03:14 PM    dsm1990gsx Posts: 2051 Joined: 10/22/2007 Status: online If you want to check the harness side of the injectors, you have to dissconnect the injector connector and the 3 ecu connectors and ohm each wire from the injector to the ecu and you should get .5 ohms or less.  Of you have a broken wire you wont have a reading or it will be very very high number. If you have a noid light staying on I would focus on why its staying powered. _____________________________ 2003 Ford Escape old ladys car 1998 Svt Contour dd 2007 Jeep Wrangler power wheels daughters car...soon to be converted from 12v to 24v (in reply to jlgma) Post #: 5

RE: 1993 Mitsubishi Eclipse injector trouble - 2/14/2008 3:16:42 AM    jlgma   Posts: 11 Joined: 2/10/2008 Status: offline I will try that, so should I check each wire by it self to a ground or per plug from injector? The reason I am checking for a broken wire is because I was told that it could be a cause to why the noid light was staying on and not pulsing like it should. Thank you for your help I will keep this up to date with results. Joe (in reply to dsm1990gsx) Post #: 6

RE: 1993 Mitsubishi Eclipse injector trouble - 2/14/2008 9:01:19 AM    jlgma   Posts: 11 Joined: 2/10/2008 Status: offline Well I was able to get a ECU pinout layout and did a test on the #1,#2,#3 and #4 pins for the fuel injectors and 1,3,and 4 were all the same at 54 ohms and #2 was at 24 ohms. So it sounds like it is the ECU that is giving me trouble. Am I missing anything? Thank you, Joe (in reply to jlgma) Post #: 7

RE: 1993 Mitsubishi Eclipse injector trouble - 2/14/2008 11:09:31 AM    dsm1990gsx Posts: 2051 Joined: 10/22/2007 Status: online When your checking to see if a wire is good, each end of the harness has to disconnected. Did you disconnect the ecu from the harness? _____________________________ 2003 Ford Escape old ladys car 1998 Svt Contour dd 2007 Jeep Wrangler power wheels daughters car...soon to be converted from 12v to 24v (in reply to jlgma) Post #: 8

RE: 1993 Mitsubishi Eclipse injector trouble - 2/14/2008 11:16:40 AM    dsm1990gsx Posts: 2051 Joined: 10/22/2007 Status: online On this diagram since you have a problem w/ the #2 injector I would check pin #2 to pin 60 at the ecu and see if that wire is good.  B/c you already know pin one is good b/c the noid light stays on. _____________________________ 2003 Ford Escape old ladys car 1998 Svt Contour dd 2007 Jeep Wrangler power wheels daughters car...soon to be converted from 12v to 24v (in reply to dsm1990gsx) Post #: 9

RE: 1993 Mitsubishi Eclipse injector trouble - 2/14/2008 12:29:30 PM    jlgma   Posts: 11 Joined: 2/10/2008 Status: offline I took the ECU out of the car to check it (the ECU). I checked 51,52,60 and 61 with a ohm meter. I used the #101 for ground and all tested the same except the #2 (#52 on diagram). I am going to check wiring next with everything unpluged. Am I doing this correctly? I sure hope so. When I checked wires unpluged from ECU and fuel injectors I had no reading from any of the plugs. (injector side) Thank you, Joe (in reply to dsm1990gsx) Post #: 10

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