Originally Posted by
gsr7121
Okay, how would i check to find out if my engine load (map sensor) is good and how would i check to see if the IAT senor is good? The throttle position? Is there a senor for that? how would the ECU know the position the throttle is in? i relocated the battery to the back of the car. I grounded the battery 1 foot away from its new location. it is also grounded to the engine and there is two ground wires on the valve cover to the body. I also have a ground wire from the engine to the body. Im i missing any grounds?
1. You check the sensors with a voltmeter. I highly suggest you go and buy a repair manual, it will help immensely.
2. Yes there is a Thottle Position sensor (TPS), and it "tells" the ecu the position by transferring a voltage to the ecu, when the throttle is closed, like 0.5 volts is sent to the ecu, so it know the throttle is closed, and the gas pedal is not being pressed. It is a linear relationship, where the voltage increases linearly as the throttle is opened, to a max of 4.5V. So, the ecu "knows" simply by reading a voltage.
3. As for the grounds issue, good luck man, I had a hell of a time diagnosing a misfiring problem. I can't tell you if you are missing any. U gotta look.
Again, go buy a repair manual, it's the best way to do these tests