Engine Performance problem
1996 Chevy Cavalier 4 cyl Front Wheel Drive Automatic 110000 miles
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My daughters car started sputtering and stalling out at stoplights. We changed spark plugs and wires. No help, then we changed the fuel filter and it seemed fine for a few trips around the block then sputtered out again. Took it to autozone and the computer says its in limp home mode...what is that and what do we do next? It seems to run fine until you slow down. If you pop it in neutral at the light you can keep it running.

First of all, the scan should have given code number(s) which will tell which component(s) are malfunctioning.
'limp home mode' is a program in the pcm (ecm) that overrides certain components and allows the engine to run so you can get it home or to a repair shop.
Problem sounds like a vacuum leak (large) or the isc (idle speed control) is malfunctioning (hence, won't idle)
Have it checked out by a reputable repair shop.
Hope I've been able to help, VIC