Question about 1994 GMC Sierra

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I need a primary wiring diagram for a 1994 gmc sierra 1500. I am try to install a motor form a 1995 gmc sonoma into the 94 sierra.both motors are 4.3 L vortecs with throttle body intakes

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 182 Answers

SOURCE: 1996 GMC Sierra 1500 truck fuel problem

Have you check the injector relay or maybe a fuse for injectors.

Posted on Aug 27, 2008

  • 393 Answers

SOURCE: wont start has fuel and has spark

these vehicles are known to have problems with the fuel pressure regulator/and also fuel pump. you need to hook up a fuel press gauge to see how many lbs.ther are. being off 1-2 lbs.from spec will cause a no start that will drive you crazy.

Posted on Nov 15, 2008

csmock132
  • 4669 Answers

SOURCE: 1997 gmc sierra 1500 5.7 vortec got spark got fuel

You said you have fuel pressure but what is it? It has to be 55 psi or it won't even try.

Posted on Mar 15, 2009

  • 1 Answer

SOURCE: upgrade 4.3 l carb engine to vortec TFI fuel system

It can be done but it is very time consuming.
I use an 87 Astro van intake sensors and computer on my 86 OMC.
After six years I am still playing with it.
Runs good and easy on gas.
Got lots of info from DIY-EFI.
You HAVE to change programing in the computer.
I am running a closed loop system with one oxygen sensor in the starboard manifold.
Your 94 computer is not as good for a boat because it also controls the transmission.

Just to give you an idea what your in for.

Posted on May 03, 2009

jagjeffery
  • 318 Answers

SOURCE: throttle body injectors not fiering but there is fuel pressure

the injectors are fired thru the engine cotrol module but it gets its signal to fire from the pick-up located inside the distributor if you are loosing injector pulse only the ignition module is bad if you are also loosing spark when you loose injector pulse your pick up is causing the problem if you replace the pick-up i recomend you change the ignition module when doing so because they work together and you have to remove the distributor to change the pick-up

Posted on May 31, 2009

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