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Originally Posted by GCPRO
I could not find this problem reported in another thread. It has been plaguing me for years now. Any ideas would be appreciated.
Problem:- Car randomly will not start
Vehicle info- 1990 Supra with 7MGE JDM engine replacement 3 yr ago
- T-top
- Viper alarm
Symptoms- Not related to humidity, temp, engine temp, etc.
- Flicking key repeatedly sometimes gets it to proceed
- Leaving car unlocked seems to make a difference
- Not using Viper (use old style key in door to lock/unlock) seems to improve things
What’s been tried- Replaced starter motor 2 times over last couple of years. Another one (Bosch this time) is going in this weekend (not expecting it to make a difference)
- Replaced battery
- Battery power and ground cables replaced
- Ignition switch and tumbler replaced
- Replaced relay supplying V to starter solenoid
My intuition is that the Toyota theft deterrent system is disallowing it to start, although I am not sure how to test/fix this. I got frustrated trying to follow the aftermarket Viper wiring installation and gave up.
Anyone else see such weirdness? Any ideas?
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check out behind the fuse panel under the dash, supras have a tendancy to leak at the door causing the back of the panel to corode and mess up the factory theft system. I've replaced 3 fuse blocks for symptoms you have described here.