Question about 1995 Chevrolet Blazer

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1995 chevy blazer running bad shooting an EGR code,

1995 chevy blazer 4.3 vorteh bad EGR took it off and cleaned it ,very carbon;d up put back on and it started for a few minutes and cut off and wouldn't start back took battery off reset computer it started run for a second untill i hit the trotel and died and wouldn't start back at all
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  • glennunderwo Dec 28, 2008

    went looking for the fuel pressure valve couldn't find it some help on it's location would be very appreciated Truck run fine untill i took it out of state was using the cruse control untill i hit road work so i turned it off after that it started to cut in and out like a loss of power or lack of gas first thing i did was clean the EGR didn't start for a few days untill i added starter fluid run for sevral minutes had a kind of miss to it around 2500/3000 RPM turned if off and so far it hasn't started back it hit a few times but never would cranked up

  • glennunderwo Dec 30, 2008

    went and rented a gauge today found the schrader valve with key on pressure reads 55PSI and like that it drops to 20 PSI. pulled top intake off and replaced the fuel pressure reg, on the spider now it doesn't start at all even with gas or carb. spay the gas output Volume is one half qrt. in 30seconds with multimetter on the spider wire hard shell conection with key off resistance was 1.5omhs

  • sergiodchihu May 11, 2010

    what will hapend if you over rev the engine ??????



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Could be that the plugs are now gas fouled. i would try replacing plugs or holding the gas petal to the floor while cranking. just be careful not to over rev the engine should it start up. Also check to see if you left anything unplugged by mistake. good luck

Posted on Jan 03, 2009

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Hook up a fuel pressure guage. Now with the key on and engine off does the fuel pressure come up fast and hold steady at a fixed value?

Posted on Dec 28, 2008

  • Peter Fadoulakis
    Peter Fadoulakis Dec 29, 2008

    In your post what you are calling a pressure valve is called a "Schrader Valve". You truck doesn't have one. To check fuel pressure you attached a fuel pressure gauge directly to the fuel rail via the proper fuel pressure adaptor. Also stop using starter fluid, it damages the engine, use carburetor cleaner instead.

  • Peter Fadoulakis
    Peter Fadoulakis Dec 30, 2008

    Your quote appears below.

    (Quote) went and rented a gauge today found the schrader valve with key on pressure reads 55PSI and like that it drops to 20 PSI.

    Sounds like it could be a bad fuel pump to me.

    Before you change it:

    Make sure its not a voltage issue. A bad connection at the pump could be making it lose some voltage. If for example the pump is getting 10 volts instead of 12 that would cause it to pump less fuel. That could account for the drop to 20 psi.

    Make sure the fuel filter is not clogged.

    Make sure the sock screen at the pump hasn't collapsed or is not clogged.

    Check with the dealer to see if there's an upgraded wire connector for the pump.



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