Question about GMC Safari

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I have a 1994 GMC Safari 4.3 FI the van is flooding out and causes it to die out changed the fuel filter and have droped the fuel tank and flushed it out. Now I have talked to a local mech he said there is a octupus looking thing that may have to be cleaned but i believe he was talking about another type of FI because mine only has a two injectors ontop of what i would call a carb Now behind those is a thing that is wet with fuel at the base of it could this be my fuel problem and what is it called and can it be replaced?

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  • bhmarine Jul 18, 2009

    Is this something I can change myself and what about that thing that is leakin fuel behind the FI's

  • bhmarine Jul 19, 2009

    Spot on! The gasket was toast! I have puchased a kit and will give that a try



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You are correct about the octupus type is for the vortex engine which you do not have. This sounds like it could be a bad coolant sensor that is reading about 35 BELOW ZERO if this is the case then the van will get way to much fuel through the injectors.Because the colder it is out side the more fuel that is required the warmer then less fuel is required.Check this sensor it is by the thermostat housing.And cost about $15 .also check the connection going into the sensor because they had a problem with breakage so when you get a new sensor most time it comes with a pig tail connector .

Posted on Jul 18, 2009

  • mike loshbough
    mike loshbough Jul 18, 2009

    Yes it is simple you need a 3/4 socket now about the fuel leak behind the injectors this part has a gasket it could be leaking by a throttle body gasket kit ,i am sorry this could be your hole problem.The gas comes up to the throttle body this is the regulator that is what is leaking it should come with a new gasket and this is something that you can do :)SO i think the hole problem is a leaky regulator and not your coolant sensor sorry for miss leading you but not seeing the van is sometimes hard ,


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Hi you have what is called a TBI system this is fuel injection at GM's beginning it is a poor design that has frequent problems. it sounds like your injectors are being pulsed at too long of a milliseconds I would suspect a bad crankshaft position sensor. as this tells the injectors when to come on and how long to stay on. hope this helps you. Sincerely, COCC AUTO TECH

Posted on Jul 18, 2009


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