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    My 98 Tahoe only blows air from the defrost vents..No Hot No Cold, just air.

    Hi guys my Tahoe only blows air from the defrost vents. It doesn't seem to blow Hot nor Cold air, just air. None of the selector positions (Floor..Mid-Level, or Top) seem to be working. Any help diagnosing my problem will be appreciated. Thanks in advance Bamba
    • Bamba
    • Thread
    • no hot or cold air from defrost vent.
    • Replies: 2
    • Forum: Interior
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    HVAC demons...

    Yes 7 years is a stretch but I thought I would give it a try. Thanks.. Will do
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    HVAC demons...

    What ended up working for you? I have a similar issue
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    Flywheel not turning when Hoe is pushed in gear

    :cool: Thx
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    Flywheel not turning when Hoe is pushed in gear

    Yes I "do" have the bolts with the knurled ends... I was wondering what that was all about... Thanks for bringing it up What are the "flywheel tools" for situations like this?? One mechanic suggested that I turn the flywheel with a "big screwdriver" inserted between the teeth?? I thought...
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    Flywheel not turning when Hoe is pushed in gear

    Yea Sunlitcomet, you have a point there. I wonder what would have caused the starter to chew up the flywheel like that in the 1st place? My logic would say that the teeth on the solenoid should be made of a softer metal than the teeth on the flywheel to prevent failures like this. It's...
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    Flywheel not turning when Hoe is pushed in gear

    Thanks for your replies guys The thought of replacing the flywheel just because it's missing 4-5 teeth isn't comforting. Eventually I'm sure I'll have to do it but now is the worst time for me to undertake a job like that. This weekend would be much better. Isn't it possible to turn the...
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    Flywheel not turning when Hoe is pushed in gear

    I thought I had a starter or solenoid problem when my Tahoe wouldn't start. I got a tow home and when I took the starter off, I noticed that about 4-5 teeth were missing from the flywheel. I tested the starter and the solenoid kicked out and turned just like it should. When I initially had...
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    Can someone HELP me with this.. Spark Plug gap??

    I feel totally stupid.... not for making a simple mistake but for "somehow overlooking" it when the problems started showing up. For the sake of anyone as silly as myself "sometimes"... I FOUND the problem! I switched two of the spark wires when I initially took the distributor cap off! I...
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    Can someone HELP me with this.. Spark Plug gap??

    I'm inclined to agree with you on all points... Thanks for your input. I'll have some time to look things over more tomorrow evening and should have something to add late Sun
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    Can someone HELP me with this.. Spark Plug gap??

    Friggin P0300 code resurfaced again a couple days ago ... I'm going to close out this thread and open one solely for the P0300 error, as it has nothing to do with spark plug gap. The 02 error has NOT returned... :) I guess I do have "something" to be happy about. On 2nd thought... you guys...
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    Scanner Code definitions and relationships

    Thx Steamroller.... I've found some decent sounding data for STFT and LTFT... Let me know what you think... http://www.youtube.com/watch?v=Ay63dWxnr7U&feature=channel
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    Can someone HELP me with this.. Spark Plug gap??

    Strangely enough my MAP readings are at around 9.7 at idle and at different RPMs?? Are you sure about the MAP fluctuations? Here is some freeze frame data associated with the P0300 error code P0300 Random / Multiple Cylinder Misfire Detected View Freeze Frame DTCFRZF P0300 FUELSYS1...
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    Scanner Code definitions and relationships

    After pulling some "Live Data" yesterday, it sure would be good to have some information on the relationship between things like SHRTFT %, LONGFT %, ... SHRTFTB1 % etc I know that these are "Short\Long Term Fuel Trim designations but what I don't know is ...what the relationship is between...
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    Can someone HELP me with this.. Spark Plug gap??

    correct Instant, everything was fine meaning that I didn't have the rough idle that I currently have. After looking for vacuum leaks (and not finding any) I DID notice what sounds like an exhaust leak coming from the area under the drivers side exhaust pipes. I'll check more and tighten the...
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    Can someone HELP me with this.. Spark Plug gap??

    Well I regapped the plugs to .040 and the SEL came on within 3-4 minutes. I figured that I would go over everything I did because it's likely I caused the problem since the SEL light wasn't there before. Since I had to remove the Dist and Rotor, I figured that I may as well replace them while I...
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    98 Tahoe P0300 fix

    Nice going MC24. I'm currently having some very similar symptoms, thx for the background info.
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    Can someone HELP me with this.. Spark Plug gap??

    Thanks DblTap, I was considering that too and the strange thing is.... There was some liquid gasket material around the Air Filter housing. I thought it strange to have it there but maybe I'll reseal it if I don't find any vacuum leaks anywhere else. I may have to go out and buy myself...
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    Can someone HELP me with this.. Spark Plug gap??

    Strangest thing happened when I went to do my 1st tune-up on my 1998 Tahoe. I have the 4WD and the engine is a 5.7L I wanted to clean off the carbon deposits on the plugs, cap and rotor. The strange thing is .. The existing NGK R spark plugs were all gapped at .035, an the sticker on the...

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