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LT1 stumbling and choking on startup....

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  • #1

    LT1 stumbling and choking on startup....

    Hello, this problem happened once several years ago and happened again today. Upon startup the engine choked and coughed and stumbled bigtime usuall less tha 300 RPM. I turned the ignition switch off and tried again. Same thing I then turned it off and tried a third time and it started perfectly and ran fine. This engine is a 95 and only has 70K on it and has always ran well with no sign of issues. It did get a new opti in 1996. The engine is stock aside from exhaust and Hypertech. Right now the engine is starting fine like it should. Also when the problem occurs there are no SES lights coming on.Any ideas.
    Thanks
    1995 Z28 Convertible, 350ci LT1 73K miles M6.
    Dyno results: 301.5 RWHP 326.7 RWTQ
    Performance Mods 4.10 gears, AS&M CAI, MADZ28 tune, Borla catback, RK Sport mid-length headers, LT4 valve springs, CC pro mag 1.6 RR's, LT4 KM, MSD OVC wires, TB bypass, 160 t-stat, SLP clutch plate w/Kevlar dual friction disk, 52MM TB, TB air foil, 1LE aluminum driveshaft, ASP UD pulley, LS1 brakes w/ Hawk HPS pads, LCA's and PHB.
    Tags: None
  • #2
    I had a problem somewhat similar, with my 97 at about the same milage. got no ses light obviously so I decided to change my fuel pump before chevy could charge my 450 to do it and that was the problem.......but again, might be other things to, just my 2 dollars

    AMF RACING: Friends don't let friends drive junk

    01 black ss #0966
    lou's short stick, slp lid and cold air, smooth bellow, centerforce, loudmouth, 3 in. y pipe, flowtech long tubes, BMR STB, SLP 4.10's, polished zr-1s, MSD wires, T-6 plugs, and upcoming goodies....Tee-Hee

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    • #3
      Check your fuel pressure

      Remove your throttle body and clean it up really well. The gasket kit is cheap. The IAS could be gooked up.
      Tracy
      2002 C5 M6 Convertible
      1994 Z28 M6 Convertible
      Current Mods:
      SLP Ultra-Z functional ramair, SS Spoiler, STB, SFCs, Headers, Clutch, Bilstein Shocks, and TB Airfoil. 17x9 SS rims with Goodyear tires, 160F T-Stat, MSD Blaster Coil, Taylor wires, Hurst billet shifter, Borla catback with QTP e-cutout, Tuned PCM, 1LE Swaybars, 1LE driveshaft, ES bushings, White gauges, C5 front brakes, !CAGS, Bose/Soundstream audio, CST leather interior, synthetic fluids

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      • #4
        any other ideas
        1995 Z28 Convertible, 350ci LT1 73K miles M6.
        Dyno results: 301.5 RWHP 326.7 RWTQ
        Performance Mods 4.10 gears, AS&M CAI, MADZ28 tune, Borla catback, RK Sport mid-length headers, LT4 valve springs, CC pro mag 1.6 RR's, LT4 KM, MSD OVC wires, TB bypass, 160 t-stat, SLP clutch plate w/Kevlar dual friction disk, 52MM TB, TB air foil, 1LE aluminum driveshaft, ASP UD pulley, LS1 brakes w/ Hawk HPS pads, LCA's and PHB.

        Comment

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