I’ve got a friend with a 1990 Toyota 4Runner Manual transmission with ~170k miles on the clock. He’s been having an issue for quite some time that he hasn’t been able to be resolved. Basically he’s got an issue with the vehicle erratically NOT starting when it is hot outside. The vehicle starts fine when it is cold outside, but when it is hot he erratically (only happens sometimes) get a “click” noise from the engine compartment with no engine turn over or anything. He is then at the mercy of the vehicle and sometimes just has to try multiple times or wait it out for awhile and try again. Sometimes just opening the hood, looking around a minute, closing it, and re-trying is able to get it to start, but other times not. Other times, and I quote from him, “sometimes i just get really upset and stomp on the clutch, get out of the truck and just shake/rock it, sometimes that’ll do it.” It happens if the engine is cold or hot, it only matters that it is hot outside, above ~90 degrees. Anyone have any ideas as to what might be the issue? Below is a list of stuff that has been done to try and resolve the issue, but hasn’t really worked.
Replaced the Alternator 2 years ago
Replaced the Battery Connectors (some were corroded)
Possible Starter Replacement within the past 5 years (double checking paperwork)
Rewired jumper wire from battery to starter
Seems sensor or solenoid related to me, but I’m unfamiliar with this vehicle/quirks and was wondering if anyone may have any ideas! Let me (us) know!