LT1 engine problem
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From: Paradise, Hawaii
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LT1 engine problem
Ok engine was running sputered & died out i say after 15-20 mins.Next day started engine & it died out after 5 mins, havent turned it on since. Today enginge just cranks over & doesnt start or try to start. Fuel pump goes on, can hear it humming. What could the problem be? Optispark crapped out? its a bone stock engine in a '97.
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From: Pleasant Grove, Utah
Car: 1993 GMC Typhoon
Engine: 4.3 Turbo
Transmission: 4L60
Axle/Gears: 3.42
Re: LT1 engine problem
opti.. replace with AC Delco or Delphi.. or you will be replacing it again in 100 miles..
Re: LT1 engine problem
Check the fuel pressure, just because the fuel pump is heard does not mean it is providing significant amount of pressure or mean the line is being somewhat clogged by a dirty fuel filter.
Joined: Mar 2000
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Even a bad pump can make "normal" sounds.
Until you've verified fuel pressure and existence/lack of spark, you shouldn't be replacing anything.
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