How to change a ECM on 97 park ave - 1997 Buick Park Avenue

Sorry these vehicles won't move without the ECM. You could put a distributor and carburetor on it but it will run poorly and guzzle gas.

The fuel filter is located under the hood on the passenger's side of the car. It is mounted to the frame rail near the lower engine area.

Read more : http://www.ehow.com/how_6715346_replace-park-avenue-fuel-filter.html

You may want to check this video.
Labor costs to change head gasket for buick park ave Yahoo Answers ( check this one out as well )

The oil light is either a bad sensor or it's telling the truth that oil pressure is low. You can install a new sensor or hook up a mechanical gauge to find actual pressure. Cutting off can be caused by way too many things to list

The code indicates the TPS is still bad and the code is usually right, but it could be a wiring issue at the TPS connector or less likely a computer issue.
To test the TPS circuit, you need to check voltage and ground from the ECM - 5v is the normal reading between the ECM reference circuit and the ECM ground circuit at the TPS connector. Checking the TPS signal circuit to the ECM requires monitoring the TPS signal on a scan tool while jumping the 5v reference and the signal circuits. The TPS reading should go from high when the circuit is jumpered to low when the jumper is removed.

i found this link, hope it is helpful to you
http://easyautodiagnostics.com/gm_tps_3.8L/troubleshoot_bad_tps_1.php

I can help, a belt diagram for a 1997 park ave, some of these cars come with a super charger, heres a diagram that list both the regular belt and then the charger belt, use what is needed, hope this helps.

Check to see if your ecm is reading an rpm signal from the crank sensor.

Code 41,error ,Camshaft position sensor .Under hood, passenger side, upper engine area, between cylinder heads, mounted behind the power steering pump reservoir.

it may fit ,but the 3.8 changed in 95-96 - heads /intake different - throttle cable connections should be different - main thing would be to get all wiring connections plugged in