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Calling all LS1 gurus, need help

This is a discussion on Calling all LS1 gurus, need help within the General Help forums, part of the LSx Technical Help Section category; Car was cold, has not been driven all day. Go out to the car, and start it up. About a ...

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    Question Calling all LS1 gurus, need help

    Car was cold, has not been driven all day. Go out to the car, and start it up. About a minute or 2 go buy, and i love to here the engine roar, so I give it a little gas. Get the tach up to somewhere near 3 grand. Let off the gas and RPMs drop, when it gets to about 1,200 to 1,350 RPMs, my lights flicker. I mean all of them, interior and exterior.

    I did this a couple of times to make sure that my eyes were not playing tricks on me. After about 5 minutes in the car, it stopped. I go for a little dirve, come back home and park the car on the steet as the drive way was full of cars. The people leave and I go to move the car into the driveway, and sit there for a second or so. Mind you the car is still warm as it was sitting for about 20 minutes or so. Any way, the car did the same thing rev it up, lights flicker. minute goes by and no more flickering.

    BTW- When the lights flicker, there is a sucking sound coming from the engine. When the lights stop flickering, the sucking sound stops.

    I described the problem as best as I can. Hope someone knows what I am talking about. Thanks.
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    Detailing + Design third_shift|studios's Avatar
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    check your connections on your battery. Do you have an amp for a stereo? is it like 5000wats and draining the battery? try it also with the a/c on [for shits n giggles].

    ps, don't rev as soon as you start the car-not enough oil flowing just yet

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    Quote Originally Posted by dipherentdesign
    check your connections on your battery. Do you have an amp for a stereo? is it like 5000wats and draining the battery? try it also with the a/c on [for shits n giggles].

    ps, don't rev as soon as you start the car-not enough oil flowing just yet
    I'll check the batery. The car is completely stock. I did let it warm up for a minute or two before I reved it up.

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    Quote Originally Posted by ccusum
    BTW- When the lights flicker, there is a sucking sound coming from the engine. When the lights stop flickering, the sucking sound stops.

    This makes me think it's just the air pump cycling. You can pull the air pump fuse and see if it stops - might throw a code (P0412 I think) but will turn the light back off after replacing the fuse and a few cold starts.

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    I Fixed Da Rear jimbo98z's Avatar
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    Quote Originally Posted by 2001NBMZ28
    This makes me think it's just the air pump cycling. You can pull the air pump fuse and see if it stops - might throw a code (P0412 I think) but will turn the light back off after replacing the fuse and a few cold starts.
    Werd, mine was doing the same thing. Air pump puts more strain on the alternator --> less current to light bulbs --> lights flicker

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    Senior Member 02z28ls1's Avatar
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    that's what the sound is-the air pump. It injects air to dilute the rich mixture caused by the needless revving.That causes the lights to dim.

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    Senior Member SeVeReDiStOrTiOn's Avatar
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    Quote Originally Posted by 2001NBMZ28
    This makes me think it's just the air pump cycling. You can pull the air pump fuse and see if it stops - might throw a code (P0412 I think) but will turn the light back off after replacing the fuse and a few cold starts.

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    Member Capster78's Avatar
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    reving is gay anyway. Your lights are trying to tell you to stop being gay.

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    Sounds like an alternator problem to me.

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    Quote Originally Posted by jimbo98z
    Werd, mine was doing the same thing. Air pump puts more strain on the alternator --> less current to light bulbs --> lights flicker
    So this might be normal?


    Quote Originally Posted by Capster78
    reving is gay anyway. Your lights are trying to tell you to stop being gay.
    And I bet you did the same thing when you got your car!

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    Sideways to da next light redline's Avatar
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    im with keliente i would check the altinator. P.S. reving the motor is not only gay but harmfull on cold starts.

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    Quote Originally Posted by redline
    im with keliente i would check the altinator. P.S. reving the motor is not only gay but harmfull on cold starts.
    Quote Originally Posted by ccusum
    ...About a minute or 2 go buy, and i love to here the engine roar, so I give it a little gas.... __________________
    To me it looks like people can't read. I would never rev an engine from a dead cold start.

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    Come on guys. He didn't post in here to get told he was gay for reving his engine. He had a specific problem and asked for help. This whole thread looks like I am reading a transcript from a couple of teenagers still in highschool. Grow up!

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    Quote Originally Posted by gnomee
    Come on guys. He didn't post in here to get told he was gay for reving his engine. He had a specific problem and asked for help. This whole thread looks like I am reading a transcript from a couple of teenagers still in highschool. Grow up!
    I AGREE WITH YOU

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    Lordy!
    I'll have to check, but I'll bet that when most of us hop in the car and pull out of the driveway, we all hit 3 grand pretty easy. My car can keep dreaming about a 2 min. warm up.

    I've never seen had any flicking lights like you described. It's got to be an electrical problem. ...and it just started happening? Bad connection or alternator is my guess.

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    My lights flickered on all 3 TA's that I have had. It's just the AIR pump cycling. I've seen other threads about this too. It's really only noticable at night. Nothing to worry about.

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