My car is a 94, auto, Del Sol.

Whenever I start the engine cold, the idle jumps around. I have read a lot of thread saying that it is the IVAC problem but I do not know how to check it. I have read some thread saying that there is one big and one small hole on the throttle that can be tested but I do not have a clear mind on exactly how to check it.

Another problem I have is whenever I have the car stop and shift it to N, the idle sometime jump and sometime don't. But once I shift it back to D, the idle stabilizes.

Can anyone refer me on the right thread or teach me how to fix it????

Thanks

 

there are 2 bolts to loose and disconnect two hoese to take out iacv and just spary some brake cleaner. it is pretty simple and straight forward.

 

anyone else

 

does the D15Y7 engine have a tps sensor???