i have a 89 lx hatch 5.0, it is idling rough, i bought a new iac and installed it but when i plug it in the car idles worse and dies, and when i try to accelerate it sputters and falls on its face and then takes off, any ideas maybe the egr? When the IAC is plugged and i am driving it the acceleration problem is better, but the idle is screwed any ideas

 

nothing i guess

 

verify tps is .99
no vacuum leaks
make sure o2 are good
maf is clean
or you can buy a code reader

 

perform the koeo and the koer test and then perform the idling reset

 

bought a new tps today put it on and it helped plugged the Iac back in and it died after bout 15 second, went ahead and bought the egr valve, putting it on this evening, will check the maf and 02 sensors are brand new i believe

 

Check codes before you go throwing parts at it.

 

check codes,
check your grounds, one at computer, one at battory to wiring harness
fuel filter old?
bad gas, low tank?

 

how do you do idiling reset?