Car Shuts Down At Red Lights/Stop Signs/IDLE, Help Car Shuts Down... Options

[themanjsq]

Hello, I've recently bought a 1994 Celica ST, The car sometimes shuts down when i come to a complete stop, the rpm would fluctuate between 800-500 shake and studder then shuts off, mostly at red lights and when the car is on drive. However, if i leave it on neutral at red lights it doesn't shut off. I've went to 2 mechanics and they fixed the tps sensor which help for a few days, but then the problem occurs again. I've went to a 3rd mechanic recently and now he's saying it's the transmission and he needs to take it out to figure out the problem charging me 695.00, which i think might be b.s. so i didn't go through with it. Spark plugs & wires are already replaced with NGK, transmission fluid was replaced with toyota transmission fluid, oil change/oil filter replaced as well, ANY HELP OR SUGGESSTIONS please thank you.

This post has been edited by themanjsq: Nov 1, 2011 - 5:16 PM

[Bigblock]

I was having idle problems. Fluctuating between 950 up to almost 2500 RPM.
I was told check all vacuum lines.
I found the PCV valve was busted off. Replaced it along with all but 2 vacuum lines.
Then I had a steady high idle. I just now found a problem with the A/C high idle valve.
Since my A/C is not hooked up, I capped off the places the hoses were connected.
Now it's a much better 1000 RPM idle.

In short, check all vacuum lines & idle components.
I'm learning alot from this site! Great group of people who have become family!!!

What transmission--
Auto or 5 speed?
Do you know what the motor is?