I have a 93 chevy truck full size one half ton 4.3 5 speed silverodo. I have a missing like surge when i change gears and mash it all the way to the floor. It seems like it clears up a little when the rpms raise,like maybe its trying to flood or something. I have replaced the plugs,plugwires,distributer cap,rotor button,new inline gas filter,oxygen sensor,new ignition coil, pvc.I had it checked for codes but did'nt show any.I cleaned the egr valve (some carbon in it} and put it back on,it seems to be working ok. I sprayed some carb cleaner down the throttle body, thinking it may have been stoped up but no help.It seems to use a lot moore gas than it should.Any help will be gratefully.THANK YOU ALL. snipped-for-privacy@webtv.net
93 chevy truck
Oct 29, 2003
4 Replies
Define "seems to use more gas than it should" in measurable, quantitative terms.
Doc
>about 15 MPG
By mashing that throttle, you're only gonna get 15. Heck, I race my
5.7 up and down the Thruway every day 80mph and better than that.Try and tighten the screws that are on top of the throttle body with a Torx bit. I had the same issue with mine. Problem went right away.
Rick
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I checked the screws and all was ok. I ran a compression check and got
155 to 165 psi on all cylinders,i thought it might be a carbined up valve.Still looking. ThanksJoin the Discussion
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