The 1947 - Present Chevrolet & GMC Truck Message Board Network

The 1947 - Present Chevrolet & GMC Truck Message Board Network (https://67-72chevytrucks.com/vboard/index.php)

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- - stumble (https://67-72chevytrucks.com/vboard/showthread.php?t=298885)

mothertrucker424

07-10-2008 08:00 PM

stumble

i own a 1993 blazer with 4.3 vortec(aluminum intake) and on acceration it stumble then smooths out i threw plugs cap wires at it and a egr and a fuel pressure regulator and still the same any ideas

p.s-no codes

bowtier

07-11-2008 08:44 AM

Re: stumble

fuel filter or filters?

My '01 was acting similar, not so much from a stop, but more accelerating pulling hills. turned out it had 2 gummed up filters.

mothertrucker424

07-11-2008 07:20 PM

Re: stumble

also replaced fuel filter i will run a pressure test tomorrow

68C15

08-29-2008 10:44 PM

Re: stumble

did the pressure drop after you shut it off? (leaking regulator and/or plastic fuel lines inside the plenum)

mothertrucker424

09-01-2008 05:43 PM

Re: stumble

yes i replaced reg. and lines and scrubbed inside plenum (fixed awhile back sorry for not replying sooner)

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