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Engine starts, then dies. Help please!

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Rabbit
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Monday, September 30, 2013 5:40 AM (permalink)
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Engine starts, then dies. Help please!

Dear Mechanically Smart People,
I kindly as for your help. I have a SW20 N/A, its a track car and doesnt get started very often. I jump started it a couple of weeks ago and it ran fine. Now I've put a new battery in it, it cranks over strongly, starts for half a second or so, then dies. To make sure it's not the the new battery doing something weird I put the old dead one back in and jump started it, as I did before and got the same result, catches for a second, then dies.
 
I changed the fuel filter in case of a blockage, made no difference. The only thing I've got to go on now is that I cant hear the fuel pump whine when the ignition is on. I've ordered a new EFI relay but wont be here till Wednesday so wonder if anyone had any other idea's to check?
 
Cheers!
 
Ben
#1


18 Replies Related Threads

    track_mr2
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    Re: Engine starts, then dies. Help please! Monday, September 30, 2013 6:00 AM (permalink)
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    Does it matter if you foot is on the accelerator slightly when cranking?
     
    You probably want to work out first if it's fuel or ignition related.
    If you have a fuel pressure gauge you can check the pressure, that will tell you if your getting fuel or not.
    Check for spark also with a plug out.
    post edited by track_mr2 - Monday, September 30, 2013 6:10 AM
    #2
    just_ace
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    Re: Engine starts, then dies. Help please! Monday, September 30, 2013 6:57 AM (permalink)
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    So the fuel pump doesn't prime when you turn key to ign? (Without cranking the motor)
    #3

    Rabbit
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    Re: Engine starts, then dies. Help please! Monday, September 30, 2013 11:13 PM (permalink)
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    track_mr2
    Does it matter if you foot is on the accelerator slightly when cranking?
     
    You probably want to work out first if it's fuel or ignition related.
    If you have a fuel pressure gauge you can check the pressure, that will tell you if your getting fuel or not.
    Check for spark also with a plug out.


    Makes no difference if foot is on/off accelerator. I'm hoping it's the EFI relay not turning on the fuel pump as I cant hear it whine when the ignition is.
    Good idea with the plug out, I'll do that this arv.
     
    Thanks
    #4
    Rabbit
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    Re: Engine starts, then dies. Help please! Monday, September 30, 2013 11:14 PM (permalink)
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    just_ace
    So the fuel pump doesn't prime when you turn key to ign? (Without cranking the motor)

    Yes, as far as I can hear it's a bit to quiet back there!
    #5
    Rabbit
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    Re: Engine starts, then dies. Help please! Wednesday, October 02, 2013 4:55 AM (permalink)
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    Not any of the relays!
     
    Edit: I checked all the relays in the box in the engine bay but is there a fuel pump specific relay on the SW20 MR2 non turbo? if there is can someone tell/show me the location?
     
    Cheers!
     
    Ben
    post edited by Rabbit - Wednesday, October 02, 2013 5:06 AM
    #6

    Mrskylighter
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    Re: Engine starts, then dies. Help please! Wednesday, October 02, 2013 5:44 AM (permalink)
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    In regards to the fuel pump running when the key is turned to Ig, I though the pump only ran for a minute amount of time to build pressure in the lines/fuel rail? Wouldn't it be normal to not hear it running when the key is turned to ignition but the engine not running?
     
    Why don't you disconnect the fuel line to the fuel filter and aim it into a bucket and turn the key? That way you'll know whether the pump is running.
     
    Have you pulled the fault codes from the ecu? A code might be stored that will tell you exactly what the problem is.
    #7
    Rabbit
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    Re: Engine starts, then dies. Help please! Wednesday, October 02, 2013 7:07 AM (permalink)
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    I'm not to sure how it all works in regards to how long the fuel pump should run on ignition (if at all). I just remember hearing some whirring/electronicy noises when the key is turned to ignition, and I'm getting non of that, just silence.
     
    I took the fuel return off and no fuel came out when the key was on ignition (which might be normal, unsure) but fuel did piss out when i kicked it over, so at least the pump isn't dead.
     
    My attention now turns to ignition.
     
    And I don't have a fault code reader thing, they easy/cheap to get hold of?
    post edited by Rabbit - Wednesday, October 02, 2013 7:14 AM
    #8
    Mrskylighter
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    Re: Engine starts, then dies. Help please! Wednesday, October 02, 2013 9:01 AM (permalink)
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    All you need to read the codes is a paperclip and the following guide :)

    How To:- Read the ECU fault codes

    How to use the ECU Diagnosis Sytem
    5S-FE Codes


    #9
    Rabbit
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    Re: Engine starts, then dies. Help please! Friday, October 04, 2013 0:51 PM (permalink)
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    ^^^^
    You learn something new every day! Thanks for that!
     
    So I've come up with 14 and 21. Igniter and Ignition Coil Circuit and Oxygen sensor.
     
    Any hints what I should look for? I need to do some recon on these two systems...
     
    Thanks again,
     
    Ben
    #10
    Mrskylighter
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    Re: Engine starts, then dies. Help please! Friday, October 04, 2013 1:14 AM (permalink)
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    I'll find you a link where you can download or view the entire workshop manual (Called the BGB)
    It has everything you could possible want to know in it. All the tests for the above faults etc.
     
    Code 14 - To me it sounds like you might have a dodgy igniter. Since the car starts (meaning coil works) and then cuts out due to the ecu not receiving an IGF signal from the igniter. Ecu will cut the engine if no IGF signal received within a couple of engine cycles I believe. Igniters are cheap to buy second hand and are easily located if this is the problem as the same part number is used on different Toyotas.
     
    Code 21 - The oxygen sensor might just be unplugged or something. Fixing this won't be the solution to your non running issue. You will get better fuel economy when cruising though :) The car will run fine without an o2 sensor. 
    #11
    Mrskylighter
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    Re: Engine starts, then dies. Help please! Friday, October 04, 2013 1:20 AM (permalink)
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    http://manual.teq.org/
     
    download either of the 1991 or 1993 BGB zip files.
    Unzip it and start reading :)
     
    Even though you have a 3s-ge engine the ignition systems should basically be the same as the 5s-fe & 3sgte.
     
    #12
    track_mr2
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    Re: Engine starts, then dies. Help please! Friday, October 04, 2013 5:05 AM (permalink)
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    Either your coil or ignitor is gone. Checking the resistance will tell you which one or you could just change both. My ignitor went a few months back so I changed both as they are both old. Once you change it then clear the codes and see if any codes come up.
    Make sure you get the exact same part number for the ignitor though as many people say different one are interchangable but some will and wont work depending on wether they havea dwell curcuit built in or not. Getting the same part number you can't go wrong.
    #13
    Rabbit
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    Re: Engine starts, then dies. Help please! Friday, October 04, 2013 6:53 AM (permalink)
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    Ok, just changed the ignitor to no avail, unsure if it was the exact same part number or not. Look identical bar the a little bit of the outer case was wider then the original one, but all the plugs lined up well and it clipped on easy enough. I will replace the coil and double check the ignitor.
     
    Fun and games.
    #14
    Rabbit
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    Re: Engine starts, then dies. Help please! Saturday, October 05, 2013 0:53 PM (permalink)
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    Replaced the coil, no luck. Chasing up exact replacement for the Igniter, as the one I got from the wreckers does have a different part number. Looking pretty pricey so far! Does anyone happen to have one lying around?
     
    Thanks!
    #15
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