Supra idle question

[Adam1978]

hey guys, im selling my car and looking for something else, i came across a supra that seems to have decent amount of work done to it (nothing serious, more like a 'new car' not performance) the only problem the guy says it has is that it wont idle. It idles fine with your foot on the gas a slight bit, and it drives perfect, but once u let go of the gas, it stalls. Do these even have carbs? haha i had this problem with my 78 camaro when i first got it, but that was a simple carb adjustment. what could cause this in an 84 supra 5spd? thanks guys!

[r0nin89]

I had an 87 NA supra. I really liked that car but was just to much of a project at the time.

That being said the car has a 5MGE in it more than likely. Probably needs an IAC, if its carbed which I'm pretty sure its not the carb probably needs to be rebuilt.

7MGE or even 7MGTE swap is the way to go with that car. They are like 3 or 400 pounds lighter than the next generation.

[WildBillyT]

It is a fuel injected engine.

[r0nin89]

Originally Posted by WildBillyT

It is a fuel injected engine.

Yeah thats what I thought. The 5MGE means electronic fuel injection but the car has been on the earth for quite some time and parts are readily available to carb that car so you never know.

[Adam1978]

is the IAC on the back near the firewall?

[Adam1978]

i was about to get one before i got my camaro a few years back, but my friend bought it from under me! so i showed him up with the 'maro lol, but it'd be nice to finally get one, they seem to be great cars. and im kind of tired of carburetion lol

[WildBillyT]

Originally Posted by Adam1978

i was about to get one before i got my camaro a few years back, but my friend bought it from under me! so i showed him up with the 'maro lol, but it'd be nice to finally get one, they seem to be great cars. and im kind of tired of carburetion lol

In my opinion, it is easier to work on an older, carbed car than it is to work an an early FI car. Especially an early imported FI car.

[Adam1978]

Originally Posted by WildBillyT

In my opinion, it is easier to work on an older, carbed car than it is to work an an early FI car. Especially an early imported FI car.

oh no question its easier, but when i have to adjust my choke everytime the seasons change, and occasionally stall bc the idle is too low when it runs a little warm, i just want the convenience, i still have my 79 with a carbed 355 haha

[WildBillyT]

Originally Posted by Adam1978

oh no question its easier, but when i have to adjust my choke everytime the seasons change, and occasionally stall bc the idle is too low when it runs a little warm, i just want the convenience, i still have my 79 with a carbed 355 haha

Vinnie can speak more to this than I, but where a carbed car can get you frustrated an early FI car can make you want to blow your ****ing brains out. Methinks he is right in recommending an engine swap in your case. In the case of your other car, it sounds like everything needs an adjustment. If you blocked your exhaust crossover with a performance manifold that will lead to rougher starts/idles in the cold.

Plus, that's getting into the too-old phase, where regular parts get expensive because demand is too low. Case in point (Rock Auto always seems to have very competitive pricing BTW, and that's not just because they are a sponsor):

Paging Christ, Jesus H :



I know this is kind of off topic but I don't really want you to get in over your head.

[sweetbmxrider]

Woooooow! I was going to get an IAC for my car and cried when I saw $80. Yeah supras are cooooool

[WildBillyT]

Originally Posted by sweetbmxrider

Yeah supras are cooooool

Yeah, with a ****load of time and money you can get them to run 12's. Wait, why does that seem familiar?

[BonzoHansen]

Ok let's drop the fantasy posts and get real here for a minute. You already have a project car why in gods name would you want another? Why not just get some beater that runs so you don't want or need to screw with? Kudos to the js guys for knowing that.

Recommending an engine swap in an old supra? holy crap. I've read some of the OP's past posts. He has trouble diagnosing and fixing a relatively simple car now. Now you guys suggest taking a car that is already be hard for him to fix and infinitely compound the problems with a swap? Holy hat.

Dude, buy a good running beater and keep working on the project car. Pass on the ill-running supra. It's probably rusted out underneath anyway. I don't mean to come off as a jerk, but you have to know your limitations. To be honest I would have some trouble fixing that old POS too. And I can't manage nor pay for multiple projects at the same time.

[91chevywt]

You should stay away from those BS cars, you'll lose your ass on it. Get an econo box, your wallet will thank you when gas is $4.00/gallon +. One thats less than 20 years old.

[r0nin89]

Originally Posted by BonzoHansen

Ok let's drop the fantasy posts and get real here for a minute. You already have a project car why in gods name would you want another? Why not just get some beater that runs so you don't want or need to screw with? Kudos to the js guys for knowing that.

Recommending an engine swap in an old supra? holy crap. I've read some of the OP's past posts. He has trouble diagnosing and fixing a relatively simple car now. Now you guys suggest taking a car that is already be hard for him to fix and infinitely compound the problems with a swap? Holy hat.

Dude, buy a good running beater and keep working on the project car. Pass on the ill-running supra. It's probably rusted out underneath anyway. I don't mean to come off as a jerk, but you have to know your limitations. To be honest I would have some trouble fixing that old POS too. And I can't manage nor pay for multiple projects at the same time.

Idk I'm not very familiar with the OPs mechanical aptitude.... I was just saying the NA motor from a MKIII supra can make a very fun driver in a MKII because its lighter.