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3823 messages,  Last post on Oct 12, 2006 at 2:31 PM

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What is this discussion about? Chevrolet Malibu, Chevrolet Malibu Maxx, Electrical, Engine, Sedan

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#3784 of 3823 Re:injector problem by 3745 Oct 05, 2006 (10:18 am)
Replying to: flower50 (Oct 05, 2006 7:13 am) This might not be a faulty injector and I would suggest caution here. The injectors are either open or closed while the engine runs. This opening and closing happens at a rapid rate. The amount of time open (mark space ratio) determines how much fuel is injected into the cylinder. The on-off pulses are fed to the injector by the computer. IF an injector driver transistor in the computer should short circuit, you will have a constant voltage on the injector coil thereby holding it open and flooding the engine.   The dealer should check if there is a constant voltage with ignition on at the injector terminals before installing a new injector. With ignition on and engine not running there should be 0volts. If there is voltage then the problem is in the computer. Injectors are pretty reliable these days. You would not want to flood your engine with fuel again so tell the dealer to take care.
#3785 of 3823 Re: injector problem by 3745 Oct 05, 2006 (11:43 am)
Replying to: flower50 (Oct 05, 2006 7:13 am) On second thoughts, if I were testing that car I would pull the fuel pump relay before switching on after fitting a new injector. Then I would turn on the ignition. Then I would test to see that there is no voltage going to the new injector. If the new injector is being held open by a faulty computer it would not flood the engine again. Replies to this message: e2helper (Oct 05, 2006 12:38 pm) 3745 (Oct 05, 2006 3:07 pm)
#3786 of 3823 Re: injector problem [3745] by e2helper Oct 05, 2006 (12:38 pm)
Replying to: 3745 (Oct 05, 2006 11:43 am) Just to clarify. The PCM (or ECM) in these vehicles provides a ground the injectors and so you will see a constant ignition voltage on the Pink wire. It is the ground which is provided and taken away.   Flooding engine. Oh I have seen that - hydrolock. Replies to this message: 3745 (Oct 05, 2006 3:07 pm)
#3787 of 3823 Re: injector problem [e2helper] by 3745 Oct 05, 2006 (3:07 pm)
Replying to: e2helper (Oct 05, 2006 12:38 pm) Thanks. The few GM schematics I have don't make that clear. BTW e2, regarding my no-heat problem. I took it to the dealer today. They have come to the conclusion that the actuator (motor) is defective. However, they did not have one on hand and had to order it so they will be doing the job next week. The car is still under warranty. Just as long as they fix it before winter is all I'm worried about.
#3792 of 3823 Re: HVAC problems. [e2helper] by 3745 Oct 06, 2006 (10:55 am)
Replying to: e2helper (Oct 03, 2006 9:17 am) Well, today the heating of my car started to work again. That's after it was at the dealer who diagnosed a faulty actuator motor which he did not have on hand but back ordered it. The motor will be in next week.   Even though it is working again I will be taking it in to have the actuator replaced. I just hope the diagnosis is correct and it is the motor. I hate these problems that come and go. There will still be a question mark about it when I get the car back with the new motor. The dealer has been very good so far and I was happy with the steering column replacement and setup. I didn't even buy the car from him.
#3793 of 3823 what you should know about MAJORGUARD by kurtamaxxxguy Oct 07, 2006 (10:12 am)
Some general info on MAJORGUARD which I did not know until this week - all very nasty surprises:   Majorguard classifies repairs into green, yellow, and red-flagged groups. Any repair in the red flagged group will __not__ be repaired by the participating dealer until they have been visited by a "majorguard adjuster". This majorguard adjuster is __not__ immediately available. The dealer has to wait 24 to 48 hours before they show up at all, and the adjusters do __not__ tell the dealer when they will actually be there. You also have to leave your car at the dealer for the adjuster to review.   What I am trying to say is if your MAJORGUARD covered car breaks down and the warrented repair is on the long "red list", you could be stranded for __several days__.   Buyer Beware !!! Replies to this message: pao (Oct 09, 2006 10:33 am) kurtamaxxxguy (Oct 09, 2006 9:18 pm) pao (Oct 10, 2006 8:40 am) and 1 more...

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