Engine stall when stopping. Cold engine. - 2000 Toyota Corolla

sorry for late post
that was dead wrong to do. 1.6L ( 8v or 16v?)
the PCM sets idle only (ISC valve) and when cold only thermal IAC valve, so if then wrecked the TB throttle stop screw setting a factory settings. (no never touch) it did this like a CARB and is not one.

so is this a hot engine stall or cold, hot means normal temps.
stall on this car means the PCM lost control of idle. (its job is that)
top cause are.
1: EGR struck open they love to just as you stop the car. and stalls at 400 rpm and is never allowed to be active at idle (PCM logic0
so is bad valve stuck.
now back to high RPM
the answer is not same for 8v and 15valve engine
8v any vacuum leak causes super high idle.
16v engine leaks cause low idle, goes lean.
stalling has many causes ,
and are not the same hot and cold engine
on cold engine the IAC open and idle is about 1500 RPM
if not the IAC is dead or EGR stuck open.
on the hot engine the ISC holds RPM at 800 rpm, (AC off)
if not ISC stuck EGR open or ISC is jammed up,

EGR and ISC just love to stick on this car and can be cleaned
the IAC is therrmal device and can not be cleaned,only replaces and are rare now.
I have simple test to prove what it is , ask/

Sounds like a TPS problem throttle position sensor

reg codes only work in UK, use real years..... so ROTW can tell.
please, tell what it does good and bad driving, idling , parked, moviing
hot and cold engine, full power from engine on hills.
stalling (it stalls) but when does it stall, under what conditions. hot or cold engine. only at stop lights hot. or>????
when an engine is cold the RPM is very high (iAC device) and it will not stall cold , if it does that is key.
if it never stalls hot. and runs perfect hot say so.
all these, clues build evidence. to what is wrong.
then we do tests.
PS: ever think to get that 60,000 mile (100km) tuneup>> now be it.

it sounds like a crank sensor if the vehicle stalls in any gear or when cold its most likely a crank sensor. located near the bottom of the engine. there almost always behind the balancer pully for the crank shaft

have vechicle code scanned bad engine coolant temperature sensor will cause vechicle to stall out and hard to crank when cold.

Have you had the electronics tested for fault codes? That is the 1st step when you have a problem like this.

Hi, car stalling problem often means the engine is not getting enough fuel and/or too much air. A cold engine needs a fairly rich fuel mixture to start, and to idle smoothly while it warms up. Any of the following could cause or contribute to this kind of stalling problem which i would not want to exaggerate until i get a clear picture of how the car stalls.

Does your engine stalls when you stop for a traffic light or when idling, or your engine just stalls unexpectedly while driving?
Answering the question will help me determine the cause of the problem.

the engine tickover is too slow when the engine is cold its running on cold start, ie:choke,, after it warms up the engine slows down this is what is causing it to stall in gear,, get some one to hold the brakes hard on and with the engine running in gear ajust the tick over till its reving at 750 - 850 rpm the revs will go up a bit when its out of gear,, before you pick a gear to go into push the foot brake down to stop the car lurching,,,

do u have a check engine light coming on? if not the plugs are not the problem a miss will trigger a check engine/service engine soon light, most likely you have a dirty automatic idle speed control motor.

mcdevito75 here, Sounds like a faulty cold start valve / sensor. Have the shop check out the cold start system of your engine.