If a Zx2 shudders and dies out at stops and idle, the idle might need adjusted. If the idle is set too low, it will not maintain enough power.
The idle setting for a 2001 ford escort zx2 is something that is not owner adjustable. It the idle is off, check for vacuum leaks or a clogged air filter.
auto or stick shift
where is the idle control motor for a 1998 ford escort
750 rpm
If your car is stalling while it is idling you could have a vacuum leak in one of your hoses. I had that problem on my 2000 escort ZX2.
The IAC (Idle Air Control) valve is faulty.
Had the same problem, the problem with mine was a hole in the vacuum line, listen for hissing noises
MAF senso, or transmission fluid.
Trouble code P1507 means: Idle air control (IAC) underspeed error
cam sensor drivers side next to exaust manifold
Perhaps throttle plate in throttle body is stuck - try to free with a screwdriver
probably have a bad alternator or voltage regulator or bad battery cables