runs rough

  1. Morgan90

    90 2500 TBI 5.7 running poorly after lots replaced

    Truck is a manual 1990 K2500 with a 350 TBI. It is stumbling, misfiring (?) under high load, dying at idle and bucking violently and has been the past few weeks. Here is a list of what I have done so far: Ignition control module Fuel pump relay Fuel filter Coolant temp sensor for the ECU...
  2. WW14

    Breaking up at high RPM

    Hi there, new to the forum. I am a GM tech of 11 years, I have a 97 k1500 that I've recently built the engine for but it breaks up and misfires through exhaust and intake above 4000 RPM. The engine is the stock roller 350 block Eagle rods and mild flat tops Comp cams xtreme energy roller cam...
  3. 9

    Truck runs rough

    Hi,I have a 1994 obs with a 5.7 truck runs rough.when the weather get extremely hot,like right now it’s 115 she has trouble starting and staying on she will crank hood but jsut doesn’t want to start.she always surges and it’s so frustrating.sometimes when I drive her and turn her off I leave her...
  4. lowkey

    '95 350tbi stumbling

    Okay y'all, I'm back with the same god damn problem lol My 350tbi stumbles and bogs down (sounds like it's choking), but ONLY when the air temperature is 0°C or lower AND it's wet out (either from rain or snow, as long as the road is wet). If it is wet and warm, it does not happen. If it is...
  5. D

    Can't get it running right -

    Greetings all - - I have a 1998 GMC Suburban K1500 with the 5.7 Vortec engine. Recently, I have had issues with the way it runs - - I will be driving along and all is good, and then all of the sudden it will lose power, start sputtering, and sometimes even dies. I shut off the key (I can put...

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