94 1.5 idle problems

i have a 1994 mirage 1.5 liter with 7000 miles on it (blew the first engine) when i relaced the engine i used some old parts and some new ,maybe this has something to do with the problem .
when the car is running on idle it will run from 800 to 1500 and return in about 4 seconds and it wil keep doing that .
i've added a bigger trothle body and bigger injectors but that didnt change anything .it could be that the TPS is of but im not sure what else ...

If you got the throttle body from an Eclipse, it's the TPS. Sometimes they can just be cleaned and will work just fine.

i swapped several TPS' and none of em really fix it :S

i swapped several TPS' and none of em really fix it :S


Damn, that's odd. I know mine was like that after I switched my throttle body. I changed the TPS and it was fine. But I also changed the IAC. Have you checked that?

im not sure what that part is but here is what i swapped :
the tps , the whole bottom half of the trothle body (wich should control the idle) and a little sensor in the intake manifold , it kinda looks like a temp.sensor but im not sure what it is