98 blazer s10 4x4?

Question

i have a gas milege issue i noticed that its suppose to do 18mpg instead its doing 12mpg the fuel meter seems like its floating or doing a dance thing lol it goes from half and a quart to only half it keeps going up and down sometimes moving around when idleing could it be a sensor issue or the fuel pump needs to be changed the car got brand new tires alingment the whole 9 yards (includes tune up) is my fuel meter possessed i hate driving 3 blocks on half and it ends up going to a quart and back up its driving me crazy help me someone before i drive it off a cliff

Answer 1

very common problem with GM trucks , I see it all the time at our dealership, your problem is the fuel level sensor. unfortunately it's attached to your fuel pump module inside the tank .
The tank must be lowered , fuel pump module has to be removed and sensor replaced.
to this day, GM still has problems with the fuel level sensors.

Answer 2

sounds like you have a problem in the fuel tank, The pump/module assembly sets in a baffled area. If a baffle broke the reading will be very erratic. You will probably need to have the tank removed to check the module & look inside the tank. If the module is O.K. you will probable need to replace the tank. Sorry

Answer 3

start small and replace your gas cap gasket and make sure your gas cap is seating properly, then check for fuel line leaks if thats not the cure bring it to a professional and save up 150 bucks

Answer 4

basically get tires like your previous ones. in case you shrink to rubble on the dimensions it ought to reason camber or toe. P-passenger automobile 185-element ratio r-radial 14-rim diameter 80 5-load score h-speed score

Answer 5

all it is is the floater in the gas tank. my 86 blazer does te same thing.