Car wont start hot

[carfanatic89]

Im not running a intercooler. The 1st thread posted tells what I have tested.
Im going to a tech school right now, and my instructor told me it sound like my ecu is missing up.
Im going to run a ohm meter over all the terminals again to see what I find, but its too damn hot to be working on my car in the parking lot.
100+ allmost everyday. lol but I'll keep yall posted on what I find.

Im just wondering, what size battery does a 7mge need.

[cme_drft]

I had a very similar problem with my 87 N/A. I figured out it was my spark plug wire boot not being all the way 'snapped' onto the sparkplug. Made a slight adjustment and fixed my problem.

[carfanatic89]

I just did a ignion rebuild. New distrubutor, cap, rotor, NGK wireset, and bosch platium 4 spark plugs. I ran good for about 300 miles then started messing up again. I was told that sometimes the transistors inside the ecm start going bad and are sometimes affected by heat.

Im not really sure this is the cause, but it would make sence it runs bad and good at random times. sometimes it takes 3 trys to start my car and other times it starts right up and revs to 1500 like its suppost to. Everything is really random and it seems to get worse the hotter the engine gets. (I just checked the coolant and cold start injector time switch yesterday and the ohms are within spec)

oh and it gets better, my car now for no reason at all idles at 400 rpm. Ill pull to a stop light and it idles at 400. green light Ill go to the next light, stop and it will idle at 700<---- this part here has me confused and the idle screw wont raise idle any.

[MK3PIMP]

take those bullshit bosch platium plugs out and get ngk and it should fix it or atleast help u out alot

[carfanatic89]

My friend has a video camera so im gonna get some videos and post them that way yall can see what im talking about. Internet troubleshooting isnt gonna help if nobodys had this problem and cant see what the car is doing.

If I dont fix it in the next 2 months im thinking about selling the car and getting a truck. Supras are badass cars and all, but im not experiencing the badassness my car once had. Ive been trying to fix it for over a year now and im running out of money and patience. Im in a tech school for auto mechanics. Doesnt really leave money leftover for my car.

[CyFi6]

try asking your problem over on Supramania - Home of the Supra
Its not that they have better people or anything, they just have much more activity than this site.

[carfanatic89]

I finally got a timing gun and checked it on the supra. I warmed it up, and jumped the te1 and e1 terminals, and was Idling at 800 RPM. It read about 20 degrees BTDC, which is way out of spec. So I adjusted it to 10 BTDC like the book says, and now it runs even worse. 1000 to 3500 rpms is fine, but no full throttle and no power above 3500 RPM. If I do give it full throttle it missed really bad and wont even accelarate and above 3500 RPM it misses bad but will accelarate as long as I ease into full throttle. WTF is up this doesnt make any sense, I put it where it needs to be and it runs worse than when its out of spec. Its a JDM motor, would that make a difference??? Any ideas? Please help

[winowill]

I have the same problem with my Cavalier Z24. Starts no problem when cold, but the minute a drive somewhere and it gets warm, my RPM meter either bounces till it dies, or it just wont start.
If the spark plug wires are turning white, they probably need to be replaced. Check them for thinning. Also, if you popped out your spark plug and found oil, you might be having that problem again. Check it one more time to make sure. You might not have fixed the initial problem.
Someone once told me that as the car gets warm the spark plug wires expand. This might be why you are having problems, if they are old and thinning.