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1G Car shuts off after running...

Posted by TK9er, Aug 12, 2020

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  1. TK9er

    TK9er Proven Member

    150
    13
    Joined Jun 1, 2014
    lincoln, Nebraska
    I just got back from a 2 month deployment and was excited to drive my car. I was even more excited when it fired right up! I was less excited when it died after a few miles. The car was tuned on e85 before I left. I filled up the tank completely before I left too. I was driving fine then just completely shut off. And didn't want to start again. It would kick over, then die. It did eventually start and I drove it a few more blocks, died again. Was able to start it after a few minutes of trying. It was able to get it back to the garage, but it wasn't happy. It bucked and tried to die. This morning it didn't want to start at all. I checked the fuel pump, it worked. I pulled the line off the rail and fuel came rushing out as I cranked it. The isc tested ok I think (it's the cheap black one, all the coils where in the 40s). It was kind of hot though, which seemed weird. Did a boost leak and no obvious sign of leaking. The ect sensor also seems to be working, good voltage and not reading a crazy number in link. I checked the plugs and they all looked good (similar color and they where not wet). It did start after a few minutes, but it ran at 2900 the whole time. The afrs where good when it was running. I tried adjusting the idle down with the biss (isc position reading was off), but it didn't respond. Checked the tps voltage, it wasn't out of wack, 0.61 I think. Then, it just dropped off and died. I have no clue where to go from here. I was wondering if the injectors got messed up after sitting. I was going to delete the fiav? I don't know. I have a ton of parts to put on this thing I bought when I was gone, but I want to make sure it drives first!

    Thanks!
     

    Street Build 804  1

    1990 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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  2. Rick_4g63

    Rick_4g63 Supporting Member

    106
    81
    Joined Nov 25, 2011
    Palmdale, California
    It may not help much but have you tried cycling out the E? It doesn't do well when it sits for a period of time. Check your injectorsto see if they're flowing properly. Thats why it's recommended to do a cycle of pump gas to clean whatever gunk Ethanol may leave behind.
    Its the only variable I can think of from having a running car to this after 2 months.
     

    2K  7

    1990 Mitsubishi Eclipse GSX
    488 whp · 389 lb/ft · 1G DSM

    66  3

    1998 Mitsubishi Montero (Winter Package)
    awd · automatic · Misc Vehicles
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  3. ChessmoDSM

    ChessmoDSM Proven Member

    433
    186
    Joined Apr 22, 2017
    Burlington, Vermont
    Are you running SD?
     

    Street Build 576  2

    1992 Plymouth Laser RS Turbo AWD
    awd · manual · 1G DSM
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  4. TK9er

    TK9er Proven Member

    150
    13
    Joined Jun 1, 2014
    lincoln, Nebraska
    Yes
     

    Street Build 804  1

    1990 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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  5. TK9er

    TK9er Proven Member

    150
    13
    Joined Jun 1, 2014
    lincoln, Nebraska
    I was going to pump the stuff out tomorrow probably.
     

    Street Build 804  1

    1990 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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  6. beegeezy

    beegeezy Probationary Member

    28
    11
    Joined Jan 26, 2010
    New Orleans, Louisiana
    Have you replaced the capacitors in the ECU? A bad idle circuit will do things like you describe.
     

    Street Build 283  1

    1992 Eagle Talon TSi AWD
    awd · automatic · 1G DSM
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  7. TK9er

    TK9er Proven Member

    150
    13
    Joined Jun 1, 2014
    lincoln, Nebraska
    I haven't, i was going to pull the ECU and see if anything looks out of sorts.
     

    Street Build 804  1

    1990 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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  8. MattHDSM

    MattHDSM Proven Member

    45
    25
    Joined Oct 20, 2018
    Ottawa, ON, Canada
    You may want to check your map sensor as well. An intermittent faulty map sensor could cause no starts one minute and running fine the next.
     

    Street Build 512  4

    1997 Eagle Talon TSi AWD
    16.870 @ 82.17 · 2G DSM
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    ChessmoDSM likes this.
  9. TK9er

    TK9er Proven Member

    150
    13
    Joined Jun 1, 2014
    lincoln, Nebraska
    how do you test the MAP? It's a new omni 4 bar?
     

    Street Build 804  1

    1990 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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  10. MattHDSM

    MattHDSM Proven Member

    45
    25
    Joined Oct 20, 2018
    Ottawa, ON, Canada
    While connected to link, you’ll want to watch what kind of pressures it reads. Most easily you can check with engine off, key on, you should see atmospheric pressure (0.0 psi). If you see -29.8 inHg, link is seeing the sensor as disconnected. Make sure the connections are secure and fiddle with the sensor and wiring just to rule out a poor connection or bad wiring.

    Going a little further than that, you can pressurize the system using a boost leak tester and compare the values. If you just want to do a quick check without disconnecting much, you can try to pressurize the sensor with just your mouth and watching on link what happens when you suck vs blow. For a GM-style, just use the vacuum line as if it’s a straw, for a Mitsu-style you’ll need to wrap your mouth around it LOL it’s quick and dirty but it’ll let you know whether something is up.
     

    Street Build 512  4

    1997 Eagle Talon TSi AWD
    16.870 @ 82.17 · 2G DSM
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    TK9er likes this.
  11. motomattx

    motomattx Proven Member

    3,224
    1,154
    Joined Dec 9, 2010
    wampum, Pennsylvania
    Are your coolant temps looking like they are legit in Link? what injectors do you have? certain large injectors have a problem with alcohol sitting in them, they will flash rust internally.
     

    Drag Race Build 4K  10  24

    1995 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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  12. TK9er

    TK9er Proven Member

    150
    13
    Joined Jun 1, 2014
    lincoln, Nebraska
    It was the MAP!!! something must of gotten loose. I wiggled the wires and it would go from good to bad. I took it off and looked everything over. I was curious because I spliced in the Mitsu 4 bar from the link SD cable set, but everything looked good. I put it back on and had the car running for a while as i pulled a wiggled the cord and it never died. I do have a question about the reading. when my car is off the map reads -1.2. What could this be. Oh and my idle is still all over the place, but that is another post :)
     

    Street Build 804  1

    1990 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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    beegeezy likes this.
  13. MattHDSM

    MattHDSM Proven Member

    45
    25
    Joined Oct 20, 2018
    Ottawa, ON, Canada
    Mine sits at -0.2 inHg with the engine off, so I’d chalk it up to not being the best calibration from the factory. Maybe link has a function which can change the zero point or even just offset it?
     

    Street Build 512  4

    1997 Eagle Talon TSi AWD
    16.870 @ 82.17 · 2G DSM
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  14. TK9er

    TK9er Proven Member

    150
    13
    Joined Jun 1, 2014
    lincoln, Nebraska
    Maybe, I ordered the aem 3.5 bar map just in case. You can calibrate that one! I'm just happy the car is running now!
     

    Street Build 804  1

    1990 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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