i had the same problem and was getting frustrated. i thought for a moment and i had a batt charger. i desulfated the batt. and then charged it up. put it in the car and she cranked right up. this was the first time in a couple months.

but like everyone is saying go from the obvious (batt) then work ur way around.

this thread did help me in a way. thanks.

i had the same problem where i replaced all the wires but still nothing......

after dissambling the starter we found out that it was the bearing that was holding it stuck.......

Starting Problem Please Help
 

Please excuse me if I don't state the Mk of my Supra or what engine model engine it has, I have only just bought it. Its a 1990 3.ltr Turbo Manual, Bought it from my father inlaw with 60K on the clock, quite tidy and I love it.

I have a starting problem where the car starts easy and runs great, but when you stop and try to re start all you get is a click from the dash and nothing, if you wait anywhere between 10 mins and 90 mins (erratic) it will start again no problem :(

Is my problem the thin blue wire and do I need to do the relay conversion ? how easy is it to do and where is the starter motor located ?

Any help would be very much appreciated as its driving me crackers. :eek3:

Sometimes the car will start as many times as you like with no problem, its erratic but sounds like the wire to the starter motor from what I have read ?

id just go to Autozone and get a new battery, and if that works then good, if not, just return it. could be its using its energy up on the initial start that it wont crank till it sort of builds up enough juice(I don\'t know a whole lot about batteries, but just get yourself a matinence-free bat, if the old one isnt matinence free then it makes things a pain in the ass when it doesnt have to be.

Battery Is OK
 

The battery is fine.

I was thinking I have the same problem as others who have had the problem with the wire to the starter motor.

Problem has been there a while, battery was replaced not long ago.

:(

http://www.toyota-supra.info/forums/...ty-system.html

possibly related to the security..

Thanks
 

Ok I have checked the battery and its fine, my father inlaw says starting problem has been a problem for some time now.

What happens is the car will start from cold no problem, always does and never fails, drive the car for a while and stop, when you go to start the car nothing, you can hear a faint clicking from the dash, but not a clicking from the solenoid, all the dash lights dim right out as you turn the key although the battery is not flat, as a rule of thumb if you wait 10 to 15 mins the car will then start no problem and you can turn off and start up again and again, somethimes it won't start for over an hour or more :( I have read the various possible causes but really would like to be sure what is actually causing this problem as I now avoid driving my Supra as its unreliable and erratic.

The car has covered 60k from new and in its time has had a head gasget and been dealer serviced on a regular basis.

Do I do the relay conversion ?

Do I check The Earth's ?

I have turned off the alarm ?

Does the Supra have a built in security system ?

Update
 

I have just checked the earth from the battery and its ok, battery terminal stays tight even when car is hot, I ran the car up to temp and turned off and re started several times with no problem, I tried to make it fail but nope it was ok, so why does it fail when it feels like it.

Battery is a good 12.5 Volts static, charge rate is good.

Someone must have had the same problem, I read the relay conversion and thought that sounded like my problem but now I have curve balls added which add the element of doubt :(

I would really love to trust my Supra and drive it but I can't sit and wait up to 90 mins each time I stop :boring: so I am :confused::frown::eek3:

You replaced the starter with a new one? If so, it has to be a power issue. The problem with checking everything is, that you are looking at what looks like a heat related issue. When the engine is hot (after you drive for some time), something happens that stops the power from getting to your starter.

Therefore (not being an expert) I would replace the blue wires as described earlier in the post, or if you want to just try something .. you can try to move wires away from the engine (trace them to the starter, and just try to ensure that none are close to the engine). Of course... I would replace the blue wires, just because its a "known issue" and thats a "known solution".

Having said all that, and here I go not being an expert - therefore giving a partial answer.... get the engine hot enough that it wont start and test the voltage at the starter post. (not sure what you should have there normally) Then when the engine is cold enough to start again, test the voltage at the starter again. See if there is a difference. That will go miles toward solving the problem. If its the same both times, it may be the starter itself. Getting a new starter, and putting it in will tell the tale. And if your careful with the new starter and it doesnt change anything, you can always return it.

The Thin Blue Wire
 

Ok I am going to do this conversion and fit a Relay and move the blue Wire, what d I need to do to access the starter motor and where is it located ?

Can I fit a Solid State Relay instead of the normal automotive type ?

Maybe best if I buy a manual for the 1990 MK III ? does anyone know where I can get one on CD ?