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  1. #1

    Default 99 5.3 w.t.h. ??

    My 99 Z-71 wants to burp fart and fall flat on its' face coming out of the hole , been to the shop and no codes to lead me... new plugs,wires etc, all different kinds of fuel cleaners and additives. Any help would be greatly appreciated

  2. #2


    Need a little more info...

    - How many miles on the motor?
    - Any aftermarket parts (ie. CAI, Headers, muffler, etc.)?
    - Lift or leveling kit?
    - Stock or upsized tires?
    Pavement sucks... :grrrrrr:

    1994 K1500 4x4 Ext. Cab
    PCM chip and Xenon 8000k bulbs 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

  3. #3

    Cool 99 5.3 wth?

    When was the last time you changed your fuel filter?

  4. #4


    truck has 120k and it is bone stock no aftermarket anythings , fuel filter was changed 3 weeks ago along with the plugs, wires, air filter. It acts like is is out of time belching back through the plentum. just funny there are no codes to go on , i have been leaving my scanner hooked up and still nothing.

    thanks in advance for any ideas

  5. #5


    Check the resistance in your injectors they should sit around 11-13 ohms, pull the connector and touch your multimeter to the prongs on the injector. Also check your fuel pressure, and check for a clogged exhaust, pull the cat and run her open headers for a trip. your maf could be dirty, so could your throttle body. alot of little things could cause a big problem. good luck

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