help ! i get really bad gas mileage. only 10 MPG !
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help ! i get really bad gas mileage. only 10 MPG !
i have a 1993 lexus ls400 and it has about 155,000 miles on it . i changed both front o2 sensors and air filter . and i only get 10 miles per galllon . is there anything else i could do to try to improve my gas mileage . if it stays like this i might as well get a SUV . i am planning on changing the fuel filter and pcv valve . would that help ?
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Originally Posted by billy boi
i have a 1993 lexus ls400 and it has about 155,000 miles on it . i changed both front o2 sensors and air filter . and i only get 10 miles per galllon . is there anything else i could do to try to improve my gas mileage . if it stays like this i might as well get a SUV . i am planning on changing the fuel filter and pcv valve . would that help ?
Whatever you do, you have to do it quick before it ruins your cats. Sometimes the O2's can be off without throwing out a code. Any warning lights on? Does it run any differently?
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#8
Does your garage smell like gas? Then it may be leaking. EVen if you park outside, you have to see some gas stains and smell it for you to get such poor mileage. If it is leaking, stop driving and get it fixed. The car can be lethal. It can explode into flames, or you can even lose traction in the wet and spin out even if a drop or two, (yes a drop) get between the tyre and road when it's wet and you are turning.
Are you talking about 10 mpg with the A/C on, in really bad stop and go traffic? then it is normal. If you are talking highway at 65 mph steady, then something is wrong. It could be a combination of spark plugs, plug wires, distributor, MAF sensor, under inflated tyres, brake master cylinder locked, a stuck brake caliper, etc. Check all these and get back to us. I think it is time to take her in, hook her up to a diagnostic comp, and get pro help, even before you decided to change the O2 sensors.
Are you talking about 10 mpg with the A/C on, in really bad stop and go traffic? then it is normal. If you are talking highway at 65 mph steady, then something is wrong. It could be a combination of spark plugs, plug wires, distributor, MAF sensor, under inflated tyres, brake master cylinder locked, a stuck brake caliper, etc. Check all these and get back to us. I think it is time to take her in, hook her up to a diagnostic comp, and get pro help, even before you decided to change the O2 sensors.
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no gas smell . no gas stains at parking spot . runs good . especially with new air filter on . no warning codes or check engine lights . good psi in tires . and yes , it is stop and go traffic alot with AC on full blast cause of 90-95 degree weather we're having . could that be the cause ? when i make my trip to philadelphia , i'm going to check to see if the odometer is correct .
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someone had brought this to my attenetion on the other lexus forum . that it could be either the cat or a brake caliper . i dont think its the catalytic convertor cause i passed inspection . but i do know that one of the calipers is like stuck . my friend was trying to pry it out so that it could move back and forth when applying the brakes but all it does is stay like in a locked position . but not on the rotor . like away from the rotor . could that be it ?
#15
Originally Posted by billy boi
true ! youre right . would me blasting the AC at full with stop and go traffic have any affect ?