Cold start injector

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  1. #1

    Cold start injector

    I recently posted about an issue with a rough start in the morning in my 1984 celica supra. My fuel pump was bad and I have been told it could effect cold start so I had the fuel pump replaced also there was a ripped vaccum hose on the intake manifold i was able to fix, not sure what exactly made it start better. It was perfect for DAYS then sure enough... Ive taken it to two mechanics and neither could find the problem. Could someone please send me a pic pointing out everything i would need to check that could be the possible culprit and the steps on how to if possible. I am a female with very little experience with working on cars and i just want to solve this issue once and for all and mechanics havent been much help so far so I'd really like to take it into my own hands if possible.

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  3. #2
    CelicaSupra.com Member ddd228's Avatar
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    The cause for hard starting usually is related to the fuel system.
    Does it run GREAT when it finally starts?If the answer is YES.....

    You will need an ohm meter to do this fuel-related test:
    http://www.cygnusx1.net/Supra/Librar...aspx?S=FI&P=71
    Read the entire section and SAVE this.
    Dave in Seattle. I keep LATE hours.Hidden Content
    '84 type "L" ,Auto ,daily driver. Dk blue.

  4. #3
    Yes, perfect when it starts. Thank you!!! I will let you know how this goes. No issues, also i recently had the battery changed and now that light too when i first start it comes on but then i give it another crank and it goes away so maybe just a malfunction ?

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    CelicaSupra.com Member ddd228's Avatar
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    "That light" is a check engine light? I hope that the person who changed the battery SAVED the memory in the system-battery saver tool.Did you lose the radio station pre-sets?
    It's a certain degree of malfunction when the car is hard to start.Mine fires off in 2-3 seconds.So should yours.
    There should be residual fuel pressure to allow a trouble-free fire up.

    The cold start valve kicks in right away and the COLD idle is around 1,200 RIPPEMS,like it should.
    It's just WEIRD that it was fine for a few days and the same symptoms are back.

    Be prepared to answer more questions because the symptoms that you describe are vague.
    "Hard starting"means to me a LONG
    starter cranking time and then it runs poorly when the engine finally starts.Then runs OK.
    Does it start right away,when the engine is warm?
    Dave in Seattle. I keep LATE hours.Hidden Content
    '84 type "L" ,Auto ,daily driver. Dk blue.

  7. #5
    I just meant a malfuction with the battery light since it turns off the second time i start the car so maybe there is nothing wrong with the battery just a malfunction in the light , nothing seems wrong with the battery that i can tell, but I am no expert. I really dont understand why, I'll think the issue is fixed then it starts happening again, the car runs smooth once warmed up, its just very shakey when i crank it and sometimes takes a few times. I'll ask them about the battery, thanks again.
    Last edited by Izzie; 07-02-2019 at 06:02 PM.

  8. #6
    Sorry for the confusion, I didn't mean to explain incorrectly.

  9. #7
    CelicaSupra.com Member ddd228's Avatar
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    I'm afraid that we are on the wrong page.We are both very lost.
    If your chosen technician cannot determine a problem with your car,I will be of little help from my armchair.Sorry.

    The red battery light to the left of the volt meter will come on,key ON engine OFF.
    Dave in Seattle. I keep LATE hours.Hidden Content
    '84 type "L" ,Auto ,daily driver. Dk blue.

  10. #8
    Yes the battery light will stay on even when I've started driving but if I turn off the car and start the car a second time it goes away. Sorry I'm terrible at explaining things "that light" wasn't very descriptive... haha. I will try and remember to take a video tomorrow morning. I'm going to take it to someone that specializes in older toyotas before I give this a go by myself ... I'll have him explain things to me and point to everything so I can learn after it hopefully is fixed

  11. #9
    CelicaSupra.com Member
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    Start with cleaning the battery terminals and then have an Auto parts place do their free test on the charging and battery condition. Alternator could be bad or the battery is weak.

  12. #10
    CelicaSupra.com Member ddd228's Avatar
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    Maybe a main relay has burned points.That may explain why it does not work when cold.
    Charge light comes on during a low voltage condition.

    http://www.cygnusx1.net/Supra/Librar...l.aspx?S=E&P=6
    http://www.cygnusx1.net/Supra/Librar...l.aspx?S=E&P=6

    Early Toyota's had a "Charge Relay".
    You can swap relays around to diagnose a relay issue. Under hood fuse box.
    Possible corrosion on a ground wire or fuse blade.

    http://www.cygnusx1.net/Supra/Librar...Section=BE&P=7

    If you go to an electrical specialist,look for the Old Guy to diagnose your issues.They are usually overweight with glasses.
    Dave in Seattle. I keep LATE hours.Hidden Content
    '84 type "L" ,Auto ,daily driver. Dk blue.

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