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Car dies between shifts.. Possible alternator problem

Posted by crazyquik22023, Apr 27, 2011

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  1. crazyquik22023

    crazyquik22023 Proven Member

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    Joined Sep 14, 2008
    Akron, Ohio
    I am having a problem where my car wants to die between shifts. If i shift and let off the gas for more than a second the car will die. The car idles perfect, ISC is good and no leaks anywhere. I just replaced the alternator a few days ago and the belt could possibly be a little bit loose but would this cause the car to die between shifts? The alternator also isn't charging the battery past 12.5 volts. I am hoping its because the belt is loose. I haven't been driving the car and I'm going to tighten the belt tomorrow, I'm just wondering if you think that a loose belt or bad charging alternator would cause the car to die between shifts. I think its a good chance that's the problem what do you guys think? Thanks
     

    850  0

    1998 Mitsubishi Eclipse GST
    12.900 @ 115.000 · 2G DSM
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  2. Bud92gsx

    Bud92gsx Proven Member

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    Wisconsin, Wisconsin
    Take the ground off the battery during idle..If the car dies then it's a alternator problem..A battery should in theory only charge to 12.2 volts If I remember corectly..So 12.5 isn't that much overcharged..On a load the battery charges at over 14 volts, which is normal..So try that and post back up when you get the results..
     

    5K  20  14

    1992 Mitsubishi Eclipse GSX
    13.300 @ 102.400 · 1G DSM
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  3. crazyquik22023

    crazyquik22023 Proven Member

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    Akron, Ohio
    The battery will only charge to 12.5 volts while under a load. I know that my alternator belt is loose and not charging the battery as much as it should as stated above. I'm not trying to find out if my alternator is bad all I'm wondering is if a bad charging alternator for whatever the reason, will cause the car to die between shifts. Also you disconnect the + battery terminal when doing this test not the ground wire. :nono:
     

    850  0

    1998 Mitsubishi Eclipse GST
    12.900 @ 115.000 · 2G DSM
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  4. Dhan

    Dhan Supporting Member

    899
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    Joined Apr 29, 2010
    Denver, Colorado
    There could be an issue with the idle control, which could stem from the ECU.

    Is it every shift and only when driving? Is it sporadic or does it always happen?
     

    2K  4

    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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  5. Bud92gsx

    Bud92gsx Proven Member

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    Wisconsin, Wisconsin
    Everytime someone says undo this terminal someone else undo the other one..It's crazy..

    Yes the battery only charges to 12.5 but doesn't the charge system show +14 volts..

    You aren't running non recirculated bov are you..That should help narrow it down..
     

    5K  20  14

    1992 Mitsubishi Eclipse GSX
    13.300 @ 102.400 · 1G DSM
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  6. crazyquik22023

    crazyquik22023 Proven Member

    610
    5
    Joined Sep 14, 2008
    Akron, Ohio
    Yes my bov is recirculated and this happens all of the time. The engine has less than 100 miles on it, the car idles fine and has no leaks. I just replaced the ISC and o-ring, both TB gaskets, BISS screw & o-ring. The ECU is also very new. I got it from ECMTuning about 1 year ago. I also have Dsmlink v3. Also I haven't tested the voltage from the alternator yet, but I did have the alternator tested right before I put it on and it tested fine.
     

    850  0

    1998 Mitsubishi Eclipse GST
    12.900 @ 115.000 · 2G DSM
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  7. Bud92gsx

    Bud92gsx Proven Member

    8,020
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    Joined Jan 16, 2008
    Wisconsin, Wisconsin
    Damm, so what the hell could it be then..Have you double checked your connections just to make sure there all tight..I'd be pretty sick of the car dying all the time..
     

    5K  20  14

    1992 Mitsubishi Eclipse GSX
    13.300 @ 102.400 · 1G DSM
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  8. beihl304

    beihl304 Proven Member

    221
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    Joined Jun 7, 2008
    mcmechen, West Virginia
    Sounds to me that you are running too rich between shifts. If the alternator wasnt charging to its full potential the car would not shut off between shifts unless the battery was bad. If that was the case then the car would not start back up without a jump or charged battery.
     
  9. crazyquik22023

    crazyquik22023 Proven Member

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    Akron, Ohio
    ya all of the connections are tight, again I'm not trying to really figure out why my car is dying yet. I'm just wondering if it could be the alternator not charging causing it do die between shifts. If this is the problem I will be able to fix it easily, if not then ill start searching for what the actual problem is. Thanks for the input though
     

    850  0

    1998 Mitsubishi Eclipse GST
    12.900 @ 115.000 · 2G DSM
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  10. RvlutionMtrsprt

    RvlutionMtrsprt Proven Member

    570
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    Eugene, Oregon
    What is your ISC position at idle?
     

    Street Build 1K  0

    1991 Mitsubishi Galant VR-4
    manual · Galant VR-4
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  11. crazyquik22023

    crazyquik22023 Proven Member

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    Akron, Ohio
    I believe it is at about 55 which i know is a little high but I want my car to idle at around 1100. Also I forgot to mention my car gets a cylinder 3 misfire code after driving it with it dying for a few minutes.
     

    850  0

    1998 Mitsubishi Eclipse GST
    12.900 @ 115.000 · 2G DSM
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  12. phunny

    phunny Proven Member

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    Pittsboro, Indiana
    Not the alternator would not cause this.
     

    Street Build 2K  0

    1999 Mitsubishi Eclipse GSX
    manual · 2G DSM

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    1999 Mitsubishi Eclipse GSX
    10.500 @ 134.000 · 2G DSM
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  13. crazyquik22023

    crazyquik22023 Proven Member

    610
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    Akron, Ohio
    Well I'm lost then. Any ideas why the car would be dying?
     

    850  0

    1998 Mitsubishi Eclipse GST
    12.900 @ 115.000 · 2G DSM
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  14. paultheninja

    paultheninja Proven Member

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    Warsaw, Indiana
    Re-check for boost leaks. My car used to do this and thats all it was.
     
  15. crazyquik22023

    crazyquik22023 Proven Member

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    Akron, Ohio
    No boost leaks.
     

    850  0

    1998 Mitsubishi Eclipse GST
    12.900 @ 115.000 · 2G DSM
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  16. mikus

    mikus Proven Member

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    Naperville, Illinois
    does it happen if you're at a standstill idling, rev up and let it drop down? Or, only when there's a load?
     
  17. crazyquik22023

    crazyquik22023 Proven Member

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    Akron, Ohio
    Good question. :hmm: I have to check. I believe it's only when the engine is a load. If it stalls when I just rev it there is probably a boost leak.
     

    850  0

    1998 Mitsubishi Eclipse GST
    12.900 @ 115.000 · 2G DSM
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  18. phunny

    phunny Proven Member

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    Pittsboro, Indiana
    It really sounds like the MAF is having problems measuring the actual airflow.
     

    Street Build 2K  0

    1999 Mitsubishi Eclipse GSX
    manual · 2G DSM

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    1999 Mitsubishi Eclipse GSX
    10.500 @ 134.000 · 2G DSM
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  19. STLskater92

    STLskater92 Proven Member

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    St. Charles, Missouri
    Do you have a MAFT? Do you have an aftermarket MAF? Where did you get the altinator? My car used to die while driving w/ the clutch in due to a bad NEW altinator that was less than a week old. It's very common for DSM's to have bad diodes in our rebuilt altinators. They will test good, but won't charge properly. Possibly a bad battery as cars tend to under rev when you let off the gas or push in the clutch and the altinator doesn't charge enough to help the car get back up to idol. But first things first, tighten the belt up and check to see why your getting a plug #3 misfire code. Get back at me with any details and good luck!!!!!
     
  20. phunny

    phunny Proven Member

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    Heh weird, that's the first time I've heard of an alternator causing a stall between shifts :idontknow:.
     

    Street Build 2K  0

    1999 Mitsubishi Eclipse GSX
    manual · 2G DSM

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    1999 Mitsubishi Eclipse GSX
    10.500 @ 134.000 · 2G DSM
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  21. gofer

    gofer Moderator

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    I agree. It might not necessarily mean the MAF is bad either, is there any chance you've got a FP 4" intake on the car?

    :dsm:
     

    Street Build 18K  13  61

    1997 Mitsubishi Eclipse GST
    11.634 @ 126.050 · 2G DSM

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    1997 Mitsubishi Eclipse N/T
    manual · 2G DSM
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  22. blaze12

    blaze12 Proven Member

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    Joined Nov 27, 2010
    St.Charles, Missouri
    I would check the maf and then check for boost leaks . I would think dsm link could help you find the problem.
     

    192  0

    1990 Plymouth Laser RS Turbo
    · 1G DSM
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  23. crazyquik22023

    crazyquik22023 Proven Member

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    Joined Sep 14, 2008
    Akron, Ohio
    I am using a Dejon 4" intake with a 2g MAF. I don't have a MAFT. The alternator is a used OEM alternator w/ 60k miles on it, never rebuilt, tested good, battery is brand new, tested good. Im going to tighten the belt up and post back.
     

    850  0

    1998 Mitsubishi Eclipse GST
    12.900 @ 115.000 · 2G DSM
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  24. ExpresS

    ExpresS Proven Member

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    Joined May 12, 2009
    Deptford, New Jersey
    I'm having the same problem. My motor is around 100 miles also..people help us out LOL.
     

    266  0

    1993 Eagle Talon TSi AWD
    · 1G DSM
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  25. phunny

    phunny Proven Member

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    Pittsboro, Indiana
    Did this happen after your 4" intake?
     

    Street Build 2K  0

    1999 Mitsubishi Eclipse GSX
    manual · 2G DSM

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    1999 Mitsubishi Eclipse GSX
    10.500 @ 134.000 · 2G DSM
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