Car wont start hot

[btwilson86]

Set the TPS off of the resistance as stated in the TSRM

[carfanatic89]

Im really close to giving up on the supra, I got it back together and she's still messed up. I fixed the hot start thing. At idle it purrs like a kitten. If you gently press the throttle it will rev up and rev down like normal, but on the rev down if you give it gas to rev back up (like if you where shifting) it missfires and feel like the motor is boged down. If I give it full throttle, It acts like you turned the key off and wont rev up at all. The RPM needle just falls all the way to 0. (dies) A gentle throttle has more of a pull then full throttle. I dont know what to do know.

[carfanatic89]

I took it for a trip about 500 miles. It ran great going there but on the way back it started running bad. When at a stop it idles at 500 rpm, flutters up and down till it dies.
Yeah and its not starting when its hot. Again. I smell fuel when I try to start it, but the spark plugs are white like its running lean. The car runs good when cold and bad when hot. I cant give it full throttle at all or it will start missing.
I looked around on the internet and nobody has a full proof solution to this problem.

[azerty]

Have you cheked your IC piping for leaks?
Try diagnosting the TPS sensor as well. The procedures are in the TSRM.

[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.

[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.