OK I would like to test the MAP and the TPS as well as the coolant temp sensor manually. Meaning with a digital multi meter ok. First off unplug the temp sensor on the thermostat housing on the left (driver) side. Now set you meter on ohms and check the ohms of the sensor (not the wire harness) and do this when it is cold. Get me the reading and the temp at the time of the test.
Now the throttle position sensor ok. You will need a paper clip to use to back probe the reference wire and then you will set you meter on 20V scale and then hook up the meter + to the paper clip and - to a good ground and with key on engine off you should read.25 volts then slowly raise the throttle and it should steadly and gradually go up to 4.8 volts wide open. If there is any drops or glitches in it as you lift the throttle then it is bad replace it. Here is the wire you need to back probe (do not disconnect the sensor) the orange wire with the dark blue stripe.
If this all pans out then we will check the map sensor but you also need a vacuum pump so we can see what it is doing at different vacuum reading ok. So get back to me and we will take it from there.
Wednesday, April 1st, 2009 AT 10:02 AM