Had work done to get 2004 LT running right. Had to replace the spider, mass air flow sensor, fuel pump and new catalytic converter. Initialy went in to get O2 sensor replaced...I believe its the one on drivers side before catalytic converter. Replaced spider with a new one and still no change. getting 10MPG now. Please help with info for a fix

 

If you figure this problem out let me know I'm having the same thing

 

when was the last time that you did a tune up? cap, wires, plugs, rotor, oil and air filter?
did you ever get the O2 sensor replace? usually when one starts to go out, the rest are not far behind. keep us posted.

EDIT: and welcome to the forum.

 

i have a 98 jimmy that i just bought. i have replaced the cold air intake filter and replaced spark plugs and i'm still only getting 250miles on a full tank. anyone know anything els i can do to fix the problem?

 

have you done the wires, cap, and the rotor. those three things can play a huge part in fuel economy. i have 2 98 blazers, one 4x4 and 4x2. my 4x4 gets about the same if i dont pay attention to throttle position when im driving. my other one gets about 17-18 mpg. in the 4x4 i have 3.73's in it and i am still learning how to drive it. seems to be a bit of a difference when you have 3.42's like my 4x2 does. i have figured that when you are dippin on the highway and you get up to speed, you dont need to give it a lot of gas to maintain that speed. i am hoping with this new found technique i guess i could call it, that i am going to be raising the MPG of both of my blazers.
i have averaged about 20 mpg in the 4x4. and tomorrow i should be able to have a better number on my work truck, the 4x2.

 

no have not done any of that yet. i have the fluid called c-foam. that i am going to try out. and that cleans everything as well , injectors and so on, not very mechanically inclined in that matter for checking rotor and cap, and wires

 

are u talking about the wires that are connected to the cap?

 

When i got mine i was doing about the same a buddy told me about this guy that was installing hydrogen gen pots so i spent 130 on one could not have been happiermy mpg jumped about 8 to 10and it alsohelped the motor run cooler plus i get tax break for running hybred fuel worth checking into

 

cap, rotor and wires can be done by just about anybody. you just have to pay attention to what goes where when you do it. and use AC Delco parts.


a video that i found on youtube real quick. if you do the wires, which you probably should, just do one at a time so you dont have to worry about messing up the order. they should come with dielectric grease that you put on both ends of the wires so that when you need to change them again, they come off easy.
some people say that you are suppose to put some dielectric grease on the inside of the cap on the contacts. i for one have never done that and still dont do that...but thats just me. the point that is made with doing that is that its suppose to make the contacts last longer because they dont corrode as fast...

 

ok perfect. now how would i change the wires. fairly easy as well?