2002 Chevrolet Malibu - Answered Questions & Fixed issues

Yes you have four wires , LT green with a white stripe , LT green with a black stripe , LT blue with black stripe and a LT blue with a white stripe . All four wires come from the PCM - engine computer .

BCM - body control module controls inside light's , automatic headlamps , trunk release , door locks , mirrors . etc.. Do you know how to do automotive electrical testing ? Testing inputs an outputs of electronic control modules - BCM . How to use a DVOM - digital volt ohm meter , how to read an use wiring diagrams to find testing point's in wiring an connectors . ECM Inputs and Outputs Diagnosis Open Circuit Detection Wiring Diagram 1 Basic Electricity for Service Techs Ohm law Current Flow Opens Shorts How to Use Multimeter to Troubleshoot Common Problems http://www.bbbind.com/free_tsb.html free wiring diagrams . Enter vehicle info. year , make , model an engine size . Then under system click on body & Accessories , then under subsystem click body controls . Look for connections for the systems your having problems with an test the inputs an outputs . Do you know what serial data communications are ? 003 Communications Diagnostics You could buy a used instrument cluster on eBay or a auto salvage yard , or there are places you can send to have fixed . 012 GM Class II Communications

I knew the ignition cylinder was the problem for odometer and radio displaybstaying on, so I went ahead and removed it, installed new ignition switch, cylinder and ???? There's your problem .

Might need a new IAC, idle air control. If it is stuck open it can cause a high idle condition. Or you could have a vacuum leak. Is there a suction/whistle kind of Sound from the engine compartment that sounds new?

Inside the stereo cd player its self is a small glass looking eye that the laser shines through if the gets dirt and crud on it can cause your problem! you can buy a cd looking device to put in the player that will clean the eye

Engine coolant temperature sensor may be bad .

If you're finding it difficult to service/repair your car, get one of those online manuals. You'll not have to wait for others to answer, or rely on mechanics and all. Plus i know a website that has very good manuals online, without expiry i.e. for lifetime. www.reliable-store.com

If you're finding it difficult to service/repair your car, get one of those online manuals. You'll not have to wait for others to answer, or rely on mechanics and all. Plus i know a website that has very good manuals online, without expiry i.e. for lifetime. www.reliable-store.com

It certainly is, and could be caused by a lot of things that are not necessarily related (such as blown fuses, faulty switches, connector problems). However, with speakers cutting out, you could have a serious wiring harness problem inside the car that is affecting all these systems. I suggest you get all of these checked out by a shop to avoid possible serious trouble.

Sounds very much like you have a nick on the wiring and it maybe shorted, check your Fuses, it maybe a fuse, but if it's a nick in the wiring shorting, get it to a Garage to check, as it may cause a fire in the engine someday.

would be worth having the cat converter check for blocking the exhaust system

You are getting oil in the cylinder and that is fouling your plugs. I would guess your piston rings are bad letting oil up into the combustion chamber or it is leaking down from the head through the valve guides. Good luck

yes take it to gm dealer and pay them to program the module

I hear you say missing.. Have coil pack, wires, and cam sensor , (timing) checked. seems the timing is being affected under load.

Check with the auto parts store to see what the fuel sensor looks like, It should be accessible and I have seen those go on the smaller chevys like aveo. Look up on internet replacing gas recirculation sensor on google

I agree with Andrew about the battery and connections. If the battery is down, we're just spinning our wheels. You need to get it charged up. My info says you have passlock security system, the majority of these systems are fuel injector disable, only. I looked at your starter wiring circuit, if my wiring diagram is correct, your security system has no control over starter motor circuit. With passlock, it is the key cylinder that is matched to the security system, not the key. The key is just a mechanical key.

take to auto parts store hook up on computer

Since no repair parts or repair manuals are made available to the consumer by GM then you must remove the deck from the dash and send it in for repair at a factory approved repair center.

Take the driver side kick panel out an check to see if there are any loose ground connections . Normaly car makers hide connections behind this place . Looking at a wiring diagram mite show that all these thing's work intermittently share a common ground point . Check out this ground connection SP202 On the left side of the instrument panel, near the junction block To find or see this ground you may need to pull out the left fuse block .From the picture ,that's what it looks like .

I just have one suggestion, after what all your mechanic already did. I would want to know the fuel pressure reading WHEN IT WON'T START. So you would need a fuel pressure gauge handy, for that time it won't start. Hook up the gauge and turn the key on- if at 59 psi, when the engine won't start, then you know the fuel pump and the relay sensor is not the problem. And so probably not a fuel problem, although you haven't checked the injector circuit, but likely that wouldn't exhibit a problem as you have. So if not a fuel problem, check for spark when it won't start. Maybe the problem is in the ignition system. Buy a spark tester from a parts store, use it when the **** engine won't start- simple and easy check of your ignition system.