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  1. #1
    Jr. Apprentice
    Join Date
    Aug 2007
    Location
    Taylorsville, KY
    Posts
    11

    Default 99 TAHOE bogging down

    My Tahoe is sputtering when you give it gas. If you give it slow when it is in park it revs up just fine. If you try to rev it fast then it bogs down. When it is in drive the engine shakes and it gets a lot worse on the bogging down. I changed the plugs and plug wires and also the fuel filter but that did nothing, any suggestions?

  2. #2
    Legend unplugged's Avatar
    Join Date
    Sep 2006
    Location
    High Deserts of SoCal
    Posts
    2,554

    Talking Need more info please.

    Welcome. I helped a friend with the same problem last week, and the trouble was the plug wires. He changed the plugs first, and I came along with a set of wires that smoothed out the engine under load. You didn't mention if there were any DTC (check engine) codes.
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  3. #3

    Default

    Probably should change cap and rotor as well.
    Gary

    99 K 1500 Suburban
    78 Silverado Big 10 w/factory 454
    00 S-10 Blazer
    1976 Trans Am
    1980 Honda CB900 Custom

  4. #4

    Default

    How many miles on that '99 and what's the engine in it?

    Steve
    10 Chevy Traverse LT AWD
    02 Chevy Trailblazer LS (110K+ miles - loaded except for 4WD - WRECKED!)
    99 Chevy Cavalier LS (105K+ miles - commuter car)
    78 Chevy Suburban Silverado (454, 3/4 ton)
    62 GMC 3/4 ton Pickup (350 police interceptor)

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  5. #5

    Default i have the same problem

    Well, i changed plug wires, spark plugs, cap and rotor and i don`t solve the problem. somebody recommended me that i must to put dielectric grease in porcelain surface of the plug to eliminate the less of electric power to the plug. Check your engine at complete darkness and observe if you have electric lights in any parts (plug wires, sparks plugs, cap, etc) .

    I don`t use dielectric grease yet because it`s very freak product in my country yet (i hope that Loctite help me as soon as possible).

    i have a silverado 5.7 vortec small block. Maybe it`s simillar than your truck.

  6. #6

    Default

    PLEASE oh PLEASE do NOT use Loctite on your plugs. It's not the same and you will NEVER get the plugs out of the heads. Dielectric grease and Loctite are nowhere near the same. I can't believe you can't get it in your country for some reason, but I guess there's some weird ban on it. Good lock
    Christopher

    1991 Chevy Suburban 1/2 ton 2WD w/ chevy SBC 350-3/4 ton drivetrain upgrade w/4.10 gears 200K miles
    2005 Saturn ION-2 Stock 277K miles
    1982 Bronco, 1993 Bronco (sold), 1971 M35A2 Deuce and a Half



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  7. #7

    Default grease dielectric

    crawdaddy, you mean that i use dielectric grease but no loctite or anyone else?

    the product it`s overselled know, Loctite say me that the product arrive the next week probably.

  8. #8

    Default and grease it`s freak here

    Because the use is only in electric generation at industries. Nobody use dielectric grease in truck or car engines.

  9. #9
    Jr. Apprentice
    Join Date
    Aug 2007
    Location
    Taylorsville, KY
    Posts
    11

    Default

    Problem solved! I changed the dist. cap and rotor button and she runs like a scalded dog. I guess when the platinum plugs go out they take everything with them. I had the truck in at 100,000 miles and the the plugs showed no wear at all. It now has 203,700 miles and they look like they had been run for three times as long. The gap was out to .075 and some were .083. They should be .060. It is a Vortec 5.7 V8. Thanks for all the posts and glad I found you all.

  10. #10

    Default

    Glad you got it all figured out.

    Crawdaddy,

    I think Chevy1997 means dielectric grease sold by Loctite, not red or blue thread locker.

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