Stalling problem!!

[Fubar231]

Alright so i JUST replaced my tps and set it correctly using a voltmeter, and my cars still dies. The problem before was it would idle at like 450, and sometimes when u hit the gas then let off it would stall out. It is an automatic just to let you know. Once i replaced the TPS it fixed the idle and i thought it fixed the problem but it happened when i pulled into my driveway. Its now idleing at around 7-800 which is better, but still stalls. Anyone know what could cause this? Any help would be appreciated, Thanks.

EDIT: When it stalls out, it feels like it gets no gas for a second, you can feel a little "Blip" or whatever you would like to call it. It only happens from idle, giving it a tiny bit of gas, immediate let off from the gas, then... stall.

 

[easternguy2005]

Check for vacuum leaks ?

 

[Fubar231]

No vac leaks unless you consider the hoses for the charcoal canister. Got the one up front just dumping below my car, and the part in the back just open at the firewall. Could it be my ISCV? (Idle speed control valve) I looked for one online and it was like 470$! Say whaaaaat!

EDIT: Im going to test the resistance on it here soon, probably tomorrow when i get some light. Ill go from there.

 

[dumbo]

No vac leaks unless you consider the hoses for the charcoal canister. Got the one up front just dumping below my car, and the part in the back just open at the firewall. Could it be my ISCV? (Idle speed control valve) I looked for one online and it was like 470$! Say whaaaaat!

EDIT: Im going to test the resistance on it here soon, probably tomorrow when i get some light. Ill go from there.

pictures of said lines?

 

[Fubar231]

The "Said lines" your talking about are rather easy to find. Its the one that plugs into the front of the charcoal canister, just took the rubber hose and stuffed it down so there arnt fumes in my engine, and literally the bigger rubber line on the charcoal canister just broke when i took it off. I even let the little piece of rubber the clamp left on it. I could take pictures tomorrow when its light out.

 

[hvyman]

http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?Section=EC&P=6

did you plug the port on the throttle body?

 

[Fubar231]

No i didnt. But i had the problem before i pulled the charcoal canister out. Tomorrow ill follow the big line coming off the back to the TB and plug it. Go from there afterwords. Do you what the opening on the TB is? Like 1/2inch or what?

 

[hvyman]

like 3mm. its one of the hoses on top of the charcoal canister. you should check for vacuum leaks on the manifold it self too. easy way is to take a can of brake cleaner and spray around the gaskets hoses and all that. if the rpms increase a lil you have a leak.

wat bov are you using?
have you checked your isc?
how does the car run off idle?

 

[Fubar231]

What do you mean run off? The car idles fine. Im still using the stock bov. I have not tested the ISC's resistance yet, im going to be doing that tomorrow. Tomorrow im going to follow the line to the tb that you were talknig about, plug that off. Drive around and test it, and if it happens start messing w/ the ISC. The car does not stall out on its own, its like this.
Say your parking at a stop sign, you hit the gas to go, but just barely start pressing it and realize some douchebag flys through, you hit the brakes almost instantly after pressing the gas, car dies. Its like if you let off the gas when its real low on rpms, or if you let off when its changing gears, itll either do it, or drop to about 300rpms for a second then catch itsself. It only happens if your going slow too, its never happened at 20-30+. The most it happens is when pulling up a slight hill, just tap the gas and let off, bam stall, and its not a real rough stall either, it just dies. Doesnt jerk around or anything. Im just trying to give as much info as possible... If i cant describe it well enough ill try and get a video of it.

EDIT: hvyman, your talking about following the hose from the charcoal canister to the TB and plug it there? Just making sure. The one labled to tank? Be great if you could post a pic, or find a stock enigne bay pic and point it out.

 

[dumbo]

I would take a pic of your engine bay, it'll help, and youèll get more responses. The big line your talking about you dont mean the one that connects PCV do you? The two small lines ontop of the TB, the one closer to the front is for the charicoal canister.

Ohhhhh and I forgot. Did you check for codes???

Sorry for the damn Ès, not my computer.

 

[Fubar231]

Car does not pull any codes, i tested that earlier. Tomorrow, ill take pics and post them. See where to go from there...

 

[S.A. supra]

The isc should click soon after turning off the car. It's a fast way to see if it works.

 

[877m]

my supra was doing the sime thing i found it was a vacume line under the intake manifold. also i broke one of the lines going to my o2 sensor and that did the same thing

 

[Fubar231]

My isc clicks 4 times i believe after i turn it off. I posted some vids of the problem on sf, lemme post them on here too.

 

[Fubar231]

Engine Bay

Charcoal Canister To Tank Line

Idle set screw? Im going to try and bump my rpms up with that today or tomorrow.

And FINALLY THE VIDEO!!!


I hope this video can really get me going on the right direction.

 

[jdub]

Don't touch the air bypass set screw on the TB...it is fully closed from the factory. Messing with it will only cause more problems.

 

[grimreaper]

My isc clicks 4 times i believe after i turn it off. I posted some vids of the problem on sf, lemme post them on here too.

is it cleaned? Pull it off, there are three Phillips head screws to separate the casing.... clean it!

 

[Fubar231]

Woops, didn't know i didnt post the picture of the idle set screw. I wouldn't doubt it if the guy who owned the car before me messed with it because he was a gearhead. I was going to adjust everything back to TSRM Specs.

 

[Fubar231]

is it cleaned? Pull it off, there are three Phillips head screws to separate the casing.... clean it!

How would you clean one? I mean like, how do you guys do it, i dont want to do it wrong.

 

[grimreaper]

Carb cleaner and a rag. Make it like "new". Clean any build up off of it (its all metal, nothing should be black or sooty)