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Discussion Starter #1
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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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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"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?
 

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Discussion Starter #5 (Edited)
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.
 

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I'm afraid that we are on the wrong page.We are both very lost.:ugh:
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.
[url=https://imgur.com/pkwtSy0][/URL]
 

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Discussion Starter #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
 

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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.
 

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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/Library/TSRM/MK2/manual.aspx?S=E&P=6
http://www.cygnusx1.net/Supra/Library/TSRM/MK2/manual.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/Library/TSRM/MK2/manual.aspx?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.
 

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Discussion Starter #11
The annoying part is that I just had the alternator replaced a little more than a month ago, and the battery maybe a week ago, the battery had been fine til i took it in to get a new one... i wanted the terminals to be replaced because they're badly corroded but he cleaned them off instead. I took a video but i cant seem to post it . Does anyone know what this cut yellow wire goes to...? I am all over the place with this post I apologize! Also the yellow connectors in the second photo... ?
 

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Hahaha! One of my good friends recommended the fella I'm taking it to friday
 

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Do not worry about those yellow plugs. They are just test terminals.
When you get into the TSRM deep enough,you will see.

You may find the guy that you have been looking for.
 

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i wanted the terminals to be replaced because they're badly corroded but he cleaned them off instead. I
I once bought an 84 Supra at a charity auction for $200 that had been donated because they couldn't figure out why it wouldn't start. It was obvious that one of the first things somebody had tried was to clean the battery terminals and then they'd replaced the starter and who knows what all else they'd done. But I cut into the cable insulation and peeled it back to find that the positive cable itself was badly corroded for about the first three inches from the terminal. For a multi-strand cable, the current has to be able to pass laterally to the inner strands so that it can disperse evenly before traveling linearly along the cable. I.e. it just wasn't getting enough juice to the starter so all it would do was click. I replaced the positive battery cable and that Supra started and ran perfectly. If the person who donated it found out it was a $25 fix, they'd be really upset with themselves. Anyway, if you already suspected the battery terminals were corroded, then its just possible that the cables too are corroded under the plastic insulation or where the terminals are crimped and you can't see it. You can cut the insulation with a razor blade and peel it back a little to check. If it is, then replacing the cable may help your electrical issue. If not, wrap it back with electrical tape or heat shrink tube and continue with other diagnostic procedures.

look for the Old Guy to diagnose your issues.They are usually overweight with glasses.
No need to take it to anybody now. I'm an old guy, overweight, with glasses and I just went straight to the answer..... ;)
 

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Discussion Starter #15
So he cleaned the idler control valve, this seems to have helped a lot. He also changed the terminals on my battery, my alternator is charging like it should now, my temp gauge was wonky so he put in an after market one and even put a zip tie where i had a hair clip holding up the pocket in my driver side door haha ... oh and he did wear glasses! Cant say he was overweight tho
 
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