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Bryan Brody
Bryan Brody Posted on Mar 13, 2017
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94 tahoe blazer won't start getting fuel and spark

Replaced everything except distributor

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jack layton

jack layton

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  • Chevrolet Master 5,569 Answers
  • Posted on Mar 13, 2017
jack layton
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What testing have you done?
I looked at info for 94 blazer 5.7L engine.
Do you have spark, everywhere? Did you use a gage And check fuel pressure, with tbi fuel injection 9--13 psi. With throttle body injection you should be able to see fuel injector/s spray pattern, both fuel injectors. Even if injector/s spray pattern looks good, 5 psi won't start and run a v8.
Check for applicable trouble codes. My info shows your obd1, so you should be able to check some codes, yourself, if there are any.
You need air--fuel--spark--compression, proper amount at the proper time and it should start.

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My 94 full size blazer starts and idles fine in park and in neutral. When I put the truck in gear and hit the gas, it'll start, then act like it wants to die. The Catalytic converter is off, I'
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1997 mazda 626 won't start.
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My 94 s10 blazer won't start. Turns over hard. Pulled plugs, turns over easy. ECM fuse replaced-was bad. Fuel pump good,spider gets gas on plugs,distributor was loose,good spark on plugs.Plugs back in-...
what happened the last time it ran

did it run hot or ??

Check the oil - if none -- you could have turned a bearing. In that case, the next would be a compression test.

Best regards
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Aug 18, 2011 • 1994 Chevrolet S-10 Blazer
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Have a '94 S-10 Blazer Tahoe 4X4 and it starts
My suspicion is a starter going bad. Sometimes when starters get old and worn they will start good when the engine is cold but not when the engine is warmed up. Did you perhaps notice that lately is seemed to drag when you tried starting, especially warm or it seemed to crank a little slower? I'd replace the starter. Hope this helps.
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Aug 14, 2011 • 1994 Chevrolet S-10 Blazer
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if no crank sensor by timing cover, some vehicles are controlled at the distributor. the 95-96 have sensor by cover . before 1995 this its controlled by distributor. there is no "crank sensor" on that engine the pick-up coil inside the distributor acts as the crank reference for that engine. have a good day !! 4.3 vortex engine.
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Jun 17, 2011 • 1994 Chevrolet S-10 Blazer
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I have a 85 blazer with a "w" vin number that won"t start and isn't receiving any spark or fuel. I know it isnt receiving spark and have been told that it could be a cam sensor or crank sensor that would...
most of the time the module will fix it. it's cheap and easy to replace.
just remove the distributor cap and the rotor and you will see it.
however, according to your info, the blazer does not have a vin code W in 1985. that's a 7.4 liters engine, the full size blazer only have 5.7 liters
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Sep 23, 2009 • 1989 Chevrolet S-10 Blazer
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94 s-10 blazer won't start
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You need to get a factory service manual (not Haines or Motors or Chilton) to diagnose the problem, Most larger repository libraries have them. The FSM's have complete troubleshooting guides.
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