Engine idle fluctuates then shuts off Options

[belizecelica]

I just had my mechanic install a 7afe in my 95 ST, because the old engine was shot. It worked fine for two weeks, then now, problems. My check engine light comes on, the engine idles extremely low in neutral, then shuts down. I have to keep my foot on the pedal just to keep it from stalling. This is a good engine from a 97 corolla with 30K miles. Why is this happening???

[Four]

i had this happen to me in my 92 3sgte. it would die after about 5-10 secs of idle. but could drive perfectly normal. it turned out to be my intake manifold gasket. towards the end before i had it fixed i was only gettin 10 vaccum. sucks if thats the problem cost about 450 - 1000 in labor cuz it such a bitch to get to.

you can check by getting brak cleaner and spraying it where the manifold hit the motor, sorta by your fuel rail. if thats what it is when u spray it on your idle will come back up. also you can hear it sorta.