Question about 1998 Chevrolet Blazer

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98 s-10 blazer

New fuel pump,car runs great seems to bog down under a load

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  • yadayada
    yadayada May 11, 2010

    Have you changed the fuel filter?

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  • 350 Answers

Hi how many miles has it done yates210456

Posted on Oct 26, 2008

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I have an 02 ZR2 blazer it starts n runs idles smooth but blogs down when u give it gas lack of power I have replaced maf sensor n new fuel pump new plugs wires n rotor but still not running right.


Check for a restricted exhaust. Could be the catilitic converter, a bent pipe or a collapsed baffle in the muffler. The engine needs to breath just like we do. It sounds like you are getting enough air in at idle and under load, but if that extra air can't get back out from being restricted, then it will bog down. It's like if you were to try jogging and only being able to breath out through a straw. That's what I would check before replacing a bunch of expensive sensors.

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I have a 1999 Chevy Blazer I changed the fuel pump I have to crank on it a long I have to crank on it a long time before it will start. The I don't goes up and down it bogs down an it bogs down and dies....


It could be the fuel pressure regulator, but that can be determined by testing the actual fuel pressure in the fuel feeder rail. But first, have you changed the fuel filter? The fuel filter usually is clogged with debris whenever a fuel pump fails, so be sure to change that first.

Oct 28, 2014 | 1999 Chevrolet Blazer

1 Answer

Idles but bogs down with a load


How about a defective fuel pressure regulator, buy a fuel pressure test gauage from Autozone and test the fuel pressure under a load and at idle..

Sep 17, 2012 | 1988 Dodge D-Series Pickups

1 Answer

2004 Blazer runs normal cold start, plenty of power. Bogs down after warm up, diminishing power, won't go. Catalytic Converter? What is temp sensitive could bog engine down?


The Catalytic Converter is one possibility, but not likely. If when the truck bogs down, and stalls out, this could be more related to a fuel pump issue. If on your truck the fuel pump is located inside of the fuel tank, then once the pump heats up, this would happen. Acting as though it's something electrical, but it's really not.

Sep 28, 2011 | 2004 Chevrolet Blazer

1 Answer

86 4.3 litre V6 chevy el camino bogging down, stalling out


most likely a weak fuel pump or a clogged filter. Check fuel pressure with a gauge or as its bogging down spray brake cleaner in the Throttle Body. If this allows it to increase RPM then its the pump or filter.

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My 95 chevy blazer fuel preoblem i think


Check the Fuel pump with a presure guage.

Apr 21, 2009 | 1995 Chevrolet Blazer

1 Answer

97 blazer fuel pump


Are you getting fuel to the fuel rail on the engine? Can you hear the pump running? Recheck the hose you replaced. Could have come off. 

Jan 12, 2009 | 1997 Chevrolet Blazer

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