How to set ignition timing on 3.8 liter buick engine

SOURCE: how to replace a crank sensor on a 93 buick regal 3.8L engine

Im assuming this is the Series I 3800? If so, if you can email me I can send you some directions on the process. Its for a Series II 3800 but it should be similar. If you cant email me, post up and I'll see what I can do.

SOURCE: HOW TO CLEAN '94 BUICK CENTURY 3.1 EGR VALVE ..I

to properly clean and test the egr valve you should remove it from the car. disconnect vacuum, elect connectors, and check the gasket surface both on the manifold and on the base of the valve. you will need to buy or cut a new gasket most likely. when you apply vacuum to the control inlet, you should see the valve lift away from the seat. I use brake cleaner and compressed air to spray clean and blow out the valve just to test it and then go from there depending on what you find ---- one of the vacuum switches that controls it or a faulty vacuum line is a likely possibility also ---- so you should check them also. a vacuum pistol comes on really helpful here.

honeymokey

• 3113 Answers
• Posted on Jul 06, 2009

SOURCE: why is there No Spark in a 1991 Buick Lesabre

ECM would be the next part. Check the number on it . If it has the number 1228253 replace it anyway because they give a cutting off problem. Clean battery cables all three and replace bolts too.

SOURCE: 91 Buick Park Ave won't start

i just came across this problem myself the other day. i have a 91 buick park avenue that sometimes won't start. i checked several things out like cable connections and coil pack etc. etc. come to find out it was the wiring that came off the coil pack and connects to the crank sensor. the wiring that ran over top of the water pump had finally heated up so bad the coating on the wires had melted and when the engine got hot enough the wires would come in contact and send false signals to the computer not letting it start. after the car cools down and the wires contract it would start. so check the wires from the coil pack to the crank sensor to make sure the wires are not melted together.

SOURCE: 1990 buick lasabre with a

1. Monitor the 5v reference, Gray wire to the Throttle Position Sensor (TPS) with a Digital Volt Ohm Meter (DVOM) set to the MIN/MAX setting.

2. Monitor the TPS signal circuit, Blue wire with a DVOM. Voltage should range smoothly from approximately 0.44 to 5.0 volts as the throttle is opened.

3. Tap test the Electronic Control Module (ECM) and see if the codes come back or if the engine reacts.

possible causes wiring or Powertrain Control Module (PCM)