tps sensor maybe the problem

[costas14]

so i changed the idle air control valve, and it does the same stuff basically, turn it on and it idles at 2000-2500, and then once its warm up it does idle surge, its goes from 1100-1800 and varies, but if i have it unplugged and i drive it idles at 1100, and if i hit the gas a bit and rev up to 4000 it'll stay there and wont shift to a new gear until i punch it some more and then it changed and the idle dies down, also when its idling at its crazy way if u pull the throttle cable behind the intake in park or neutral it'll die down to 400

this is for my 95 gsx a/t

 

[sisko]

It might be your ecu ISC drivers. Sometime they burn out. If you have access to another ecu then swap and test. Check your TPS and idle switch with an ohm meter as well to make sure they are good.

 

[GSX93DSM]

Basically did you buy a new one or a used one. It could be all sort of things. You have have a bad isc, vacume leak, might want to try another one. Cause a bad isc can ruin the ecu.

 

[costas14]

hey, i did change the idle air control valve that wasnt it, im also scanning it with the snap on modis everytime the check engine light comes on, i got a code currently p1500 which is a power generator? which is telling me to check my harness and connectors, im gonan clear that code and see if it pops back on and see if anymore come on