pcm location please

The PCM is located near the air filter housing. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed...................................................................................

Cheers

how change the engine control computer on my 1998 chevy venture?

The computer has to be programed by the dealer unless you get one already programed.Whats wrong with your old computer?

it just seems like sometimes it gets good gas milage thenit dont. sometimes it seems like the engine i running rough. now my air bag light is on. i cant seem to fix the problem with the temperature gauge reading like its getting hot.the fans dont come on unless i turn the a/c on and back of then they cool it down and the fans will shut off on there own, but once they shut off they wont come back on unless i turn the a/c on and back off.

For the fans i would check the coolant temp sensor to start with before replacing the ecm.The air bag light is a different computer then the ecm.Have you even checked for codes yet?

Also a bad coolant temp sensor can make it run rough and effect gas mileage.

i have changed the coolant temperature sensor twice and the thermostat once. i had autozone hook it to there code reader yesturday and it didnt show anything.

What color were the wires going to the coolant temp sensor you replaced?

i will have to look. i dont remember the colors, but i do know that it had three wires.

I see only two wires in the wire diagram a black wire and yellow wire.

the plug has three wires and the coolant temperature sensor has three prongs.

Your going to have to get a scan tool that can read live data so you can see what the sensor is reading back to the computer.There like 54 on amazon try this unplug the coolant temp sensor with it running see if the cooling fan comes on.

what is that tool called? are you just talking about a code reader(OBD11)?

Iam talking about a obd2 code reader that can read some live engine data on obd2 cars.Which would include coolant temp just search for AL309.Have you unplugged the coolant temp sensor connector while its running to see if the cooling fan comes on?

no i have not. i will try that after work.

Alright keep me posted.