bad gas? water in tank? fuel lines clog? fuel filter shot to heck? fouled spark plugs?
Remove the two bolts holding the EGR. Note if loose. Inspect for soot blowby on the gasket. Apply high temp copper coat on both sides of gasket (IF not broken) and retighten.
Cracked vacuum hose at connection.
Roy
Did you cleaned your throttle when replaced IAC? And I'd say to check MAF performance.
2001 Isuzu VehiCROSS (build in progress): 4JX1/A340/part time, 2" body lift, front Aisin hubs, rear Aussie Locker, 4.56 gears, OEM rear sway bar disconnect, AirFlow snorkel, cabin air filter
1980 Jeep Cherokee (assembling): 1.5" body lift, TBI, HEI
1987 AMC Eagle: stock