well its the located on top of the throttle body and its loose, today i drove 40 miles and back and the car ran fine, im guessing like it was kinda hot here in so cal that had to do something withit, or because i was low on oil and addeda quart to it,ima check out the junk yard tomorrow, my car dosent turn off while driving it, just that time at start up, right after i had parked.

 

The sensor on top of the throttle body is the map sensor. You can replace that without buying a new/used throttle body. Is your check engine light on at all?

 

no is not, but after checking the ecu it had code 7 which was the tbs

 

well, obviously it's throwing a code 7 since the tps is broken. a surging idle is caused by a vacuum leak - which can be caused by a leaking fast idle valve, misadjusted base idle screw, bad idle air control valve, bad intake manifold gasket or throttle body gasket, etc.

it surges because the pcm sees the increased air flow via the map sensor. it increases fuel injector pulse to support the air and keep the air/fuel ratio as close to 14.7:1 until it feels it's getting excessive. it then cuts the fuel injectors to lower the idle speed and repeats this process because the flow of air is uncontrollable.

now that you know why the idle surges look into what is causing the air flow. do a search on idle problems - it seems everyone is having this happen this week. there is a load of good info on the first page or two of the forum so far.

 

alright i checked out all the vacums and i seen one that was leaking coolant, it under the throttle body under the idle screw, is a small hose, can that be the problem?

 

That hose goes to the idle air control vavle (IAC) and/or the fast idle thermo vavle (FITV). You should drain the coolant and replace the leaking line(s). They can introduce air to your coolant system and cause the idle to surge.

Fix the coolant problem first and clear the engine code by pulling the 7.5 amp radio/backup fuse in the engine bay box. Try to start the car and see what happens.

Are you sure that the tps is the sensor broken or is it the map sensor? The map sensor is on top of the throttle body and the tps is behind the throttle body facing the engine firewall. Those two have similiar connectors (i think), so make sure that you didn't switch them around.

 

yeah thas wat ima do this weekend, its on top so its the map sensor,