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Thread: tbi problem

  1. #1

    Default tbi problem

    i have a 92 c1500 with 225000 on it and when i start it up the tach will jump and i can
    hear it slightly miss out of the tail pipe until it warms up i put a new distributor, plugs wires
    and cap a year and a half ago and this has started about 3 months ago. just wondering
    if anyone has seen something like this before.

  2. #2

    Default

    Several easy things to do before spending a lot of money...

    - Check Distributer Cap for cracks or excessive wear, carbon on contacts, cheap to replace
    - Remove spark plugs, clean and re-gap
    - Remove IAC from TBI and clean with TBI cleaner
    - Remove TBI and clean with TBI, clean off all of the carbon
    -- with the TBI off, inspect the Intake, clean out any build up
    - Check timing, disconnect the distributer from the computer, set to 0 degrees

    After these items are addressed give the truck a good test drive. If there is no improvement in performance, the next thing to have checked is the Catylitic converter. Probably time for a new one.

    Also look over the Cylinder heads, they may be cracked.

    Let us know how things turn out.
    Pavement sucks... :grrrrrr:



    1994 K1500 4x4 Ext. Cab
    PCM chip and Xenon 8000k bulbs
    350cu.in bored over .050"
    balanced Crank, 10:1 compression
    Flat top pistons,cam,ported heads
    Option Racing Cold Air Intake
    Holley Throttle Body Spacer
    Accell Igition, 45kv coil
    FloTech Headers, no CATs, dual exhuast
    Goodyear Silent Armor A/T 305/70-16
    Pioneer SupertunerIII CD USB Bluetooth
    Kicker ZX200.2 ZX Amp
    Kicker Audio COMP 10" Subwoofer

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