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Thread: 1990 1500

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  1. #1

    Default 1990 1500

    Hey all Just wanted to say Hi , Iam new here my name is Corey, and i live in lethbridge alberta. I just bought a 1990 gmc 1500 4x4 for $750. it runs and drives . Iam just wondering the exhuast is cut off right after the cats and upon cold starts there seems to be a ticking noise coming from the exhuast , once it warms up the ticking gets quieter, I lisened in the engine bay and by the exhuast and iam pretty sure its coming from the exhuast, could cutting it off right after the cats make this noise?
    thanks all in advance

  2. #2

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    could just be lifters ticking. Have you changed oil since you got it? might want to run some system treatment/cleaner though it.
    1986 Chevy G20 Tow Rig - 5.7 TBI conversion
    1978 Mustang II King Cobra Road Racer - Holley 650, MSD 6AL, 5 speed, 10 point Roll Cage, 9" posi, fuel cell, custom interior.

  3. #3

    Default

    ya I just did a whole tune up last night iam goin to check the timming today there seems to be a miss at idle

  4. #4

    Default

    If the Header or Collector gaskets are lstarting to leak, you will also hear some ticking.

    Gaskets are cheap, just replace them and rule out that as an issue.
    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

  5. #5

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    Welcome to the club, Corey.

  6. #6
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    Hey Cory, welcome to the club. X2 on EJs exhaust gaskets repl. since you're hearing the ticking noise at the exhaust
    1988 Chevy C-3500 2wd (no pic)
    350 c.i. 5.7 L Stock Block, 4 Bolt Mains
    L-31 Vortec Heads, Edelbrock Cam & Intake,
    Holley 650, Flowtech Headers, Magnaflow exh.
    Jet Trans 700R4, B&M Ratchet, 4:10 gears,
    3" susp. lift kit "shadetree"
    No rev limiter, No speed limiter lol


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