20 Most Recent 1998 Chevrolet Malibu - Page 8 Questions & Answers

check your fuel pressure.

There are three relays in the underhood electrical center. They are directly controlled the the PCM. The PCM gets it's information from the coolant temp switch that is on the engine. On the PCM, Pin 54(dark green wire) in connector C2 controls the ground to the relay 1. Pin 59(dark blue wire) on the same connector controls the ground to relay 2. If you supply a ground to these, you will turn the fans on. What you need to figure out is if the ECT is telling the PCM what the temp is, (more likely cause) or you have a PCM malfunction(least likely cause).

Could be power steering pump or alternator. Best way to find out is to get a a couple feet of garden hose and listen closely to each. Its most likely your power steering pump. If it is, buy a new one not rebuilt.

You need to reset the theft system. To do this, try to start it. It should start and die. Then after it dies and the theft light is flashing, leave the key on for 10 minutes. After 10 min, the theft light should go out. After the theft light goes out, turn off the key. Count to 5, then restart it. Then it should work.

There is a temp door actuator motor that is not working,it is on top of the blower box,where it is mounted,the dash will have to be removed to replace the actuator motor.If this was at all helpful,please rate,thank you.

Most heater fans have a resister built into the wiring and connection block on the actual casing. High fan speed=full voltage, Mid speed=small resister, Slow fan speed=large resister. Change the resister block. Pete

Check coolant level,what size engine,if 3.4 is a litle work.

That is a job for a repair shopYou can watch it on You Tube Video

In most cases a knocking noise is something in the engine.

probably fuel pump

the shift solenoid in the side transmission cover on the valve body