Hey guys, got a 90 pickup 22re has a idle/low rpm problem. When the engine is cold, runs fine but when it warms up it lopes like it has a cam. I have changed the iacv, maf, tps. Cleaned throttle body checked for vac leaks. Im stumped, if you guys can help it would be greatly appreciated.

 

Er it does have a cam, it kinda has to! it doesn't have a maf, so you ment AFM maybe? Did you install the TPS to spec? Are you using proper tools, eg calibrated tachometer and timing gun or just playing it by ear? Have you tested or inspected the oxygen sensor and circuit? Have you checked for stored codes? ect ect.. You say you changed stuff out but you don't indicate you tested it or the test readings, this is a bad sign.

 

Double posted, other thread here

 

I know it has a cam im saying it is loping like its camed up... im just playin it by ear and havent checked oxygen sensor yet. I took it to autozone to have it hooked up but they said it couldnt be hooked up to check them