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Thread: No Spark GA70 1G-GTE Troubleshoot Help?

  1. #1
    Forum Member
    Join Date
    Jan 2019

    Default No Spark GA70 1G-GTE Troubleshoot Help?

    Hi there,

    I have a ga70 Supra non runner (1G-GTE), I'm delving in the deep end a bit as I have little to no mechanical experience.
    I have gone as far as determining that I have no spark, the dizzy rotor is not spinning when cranking (I can't hand turn it at all either) & when I look down the oil filler hole the camshaft doesn't turn on crank. That made me think maybe the timing belt has gone?
    There is evidence of electrical work from the previous owner so it's possibly an electrical fault, as occasionally the digi dash does not illuminate.
    I've tested 12v from the battery so it's not a lack of power issue.
    Starter motor cranks very strong, no signs of trying to turn over though.

    If anyone could point me in the right direction what to look at & how (in simple terms) that would be greatly appreciated!
    Could save me a lot of time & frustration.


  2. #2
    Forum Member 1st year Apprentice
    Join Date
    Jan 2017
    Kuala Lumpur

    Default Re: No Spark GA70 1G-GTE Troubleshoot Help?

    I cant help you with the other issues, but to check the timing belt, just remove the upper clips on the intercooler hoses and pull it out of the way, then you can access the timing belt cover.

  3. #3
    Toymods Vice President Chief Engine Builder TheToyman75's Avatar
    Join Date
    Jul 2005

    Default Re: No Spark GA70 1G-GTE Troubleshoot Help?

    You may have both electrical and mechanical issues but first step will be to check your Timing belt is there. Just remove the top part of the timing cover

    With the engine cranking your cams and dissy rotor should always be turning.
    1971 2T-B Celica TA22 ST.
    1971 2T-? Celica TA22
    1973 2T-G Celica TA22, aka "The Unicorn".
    1975 2T-G Celica TA27 GT
    1976 2T-G Celica TA23, aka "The Colonel".
    1985 3F Auto FJ62 Landcruiser
    1989 7M-GTE MA70 Supra, aka "The Poopra"
    History: Rods Classic Celica Sampler thread.

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