cold start

  1. D

    Rough cold start, missfire and low idle 1995 gmt400 5.7 tbi

    New computer, New dizzy, cap, rotor, wires, plugs, coil, map sensor, egr, and all vacuum hoses replaced, fuel pressure stays above 12psi when running... new fuel filter, injectors, coolant temp sensor and sender all grounds replaced and upgraded. New battery New alternator, rebuilt the fuel...
  2. Angelo

    6.5l shaking and white smoke after first start of day, taking a lot longer to warm up than it ever has

    Only after first cold start of day if I give any throttle the engine shakes, and takes a lot longer to "warm up" than it has the past 35000 miles I've owned it. It always had a bad cold start but once the ect got to above 140° or so it would have all the power, not shake and no smoke like it has...
  3. C

    Hard start when cold after tbi rebuild

    92 k1500 5.0 tbi 5 speed, I have been going through the truck and doing maintenance things and I thought I might as well rebuild the tbi as it was original at 240k miles on the motor, after rebuilding I had put on a tbi spacer (now removed), and started up the truck, I had to start it twice...
  4. K

    Help with rough startup, and randomly dies on a rare occasion from sputtering too much. 98 sierra 4x4 5.7l vortec

    This one is a pretty wonky one but suits me and my luck being (atleast most likely) something with fuel. The truck honestly drives great 90% of the time and being on the edge of hitting 500,000km. But when I go to start it up every single time it will sit there trying to start and alot of the...
  5. T

    98 5.7 vortec won't start in the cold, crank but no start.

    When it's about 30 degrees F or lower my 5.7 will crank but not start, above 30 below 40 If I do get it to start it will pitter out for a few cranks, and then might finally grab on spit a little and then run perfect and super strong, no rough idle and no performance issues. Has new starter, new...
  6. 9

    5.7 Vortec cold tap/knock HELP!

    So about a year ago, my head gasket blew on my 99 Classic. Had the heads professionally redone and had the lifters, rockers etc out. Fixed it up nice. Since then I have had a real bad cold start tap/knock. Engine didnt exceed 100⁰C when the gaskets went. The truck has about 330,000km (about...

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