I drive a 1989 Toyota Corolla. It's still a very good car and has only been in one minor accident. My brother recently rebuilt the carborator, had trouble because it was the wrong kit, then bought an old rebuilt one to replace it. It runs fine except since then my MPG has decreased. I used to get about 300 miles to a tank, now I'm lucky if I get 200. WHY?! (Besides it being old!)
2006-08-20 16:51:29 · 10 answers · asked by sarge 2 in Cars & Transportation ➔ Other - Cars & Transportation
the new carb may be jetted differently or the idle screws may be set too rich... if possible transfer over any needles and jets from the old carb and try turning the idle screws in a half turn each ... then more until it starts getting sluggish or having poor response off of idle ... then back them back out a 1/4 turn. (thats if they adjust) .. and make sure there are no leaks in the lines.
2006-08-20 16:57:26 · answer #1 · answered by Anonymous · 2⤊ 0⤋
Your mixture is not the same as it once was.
Many reasons exists for this but given the recent carb change I don't think it's age.
It's not likely that you got a carb tuned right for your engine even if it does have the same part number. Some professional work is necessary to get it right. If the mixture is lean, you'll get worse mileage, and if it's rich you get even worse mileage. (You don't have an oxygen sensor, bye-the-way.) A "off-peak" mixture can do other damage as well, a lean running engine sounds economical but it can cause burned plugs, over temp piston tops and pinging (detonation, knock, pre-ignition, etc) and lower mileage while an overly rich mixture causes carbon fouling, black exhaust and really poor mileage.
2006-08-21 08:15:11 · answer #2 · answered by GreatGasMileage 4 · 0⤊ 0⤋
The rebuilt carb is probably not optimally tuned. Were the spark plugs and plug wires replaced too, how about your oxygen sensor? Reformulated gas and fuels with higher ethanol contents also decrease MPG.
2006-08-20 17:02:04 · answer #3 · answered by Albert F 5 · 0⤊ 1⤋
another ingredient besides compression and the spark is the the octane point of the gasoline you're paying for, In the place I stay they replaced the familiar gasoline octane dropped from 89 to 87 you may desire to aim going to the mid variety gasoline to work out if your mileage will strengthen. another ingredient is the style you're using and what's on the motorbike. i've got been carrying out an test with my vehicle and keep the revs low (under 3k) and characteristic got here across that my mileage has long gone up. as quickly as the snow is going away and that i'm on 2 wheels lower back i pass to grant it a pass.
2016-09-29 12:11:03 · answer #4 · answered by ? 4 · 0⤊ 0⤋
you need to make sure it is the same model of carburetor, check the model numbers on the carburetor body, if the numbers are not the same, it will more then likely have different size fuel ports and may have different vacuum hookups.
2006-08-20 20:12:26 · answer #5 · answered by taknadvantageof 2 · 1⤊ 0⤋
It might need a tune up, get the timing good, also make sure the tires are filled right, soft tires subtract mileage.
2006-08-20 16:57:37 · answer #6 · answered by jxt299 7 · 1⤊ 1⤋
What is the color of the exhaust ?
Are there any knocking ?
Does the engine shakes more than before ?
2006-08-20 16:58:36 · answer #7 · answered by Just_curious 4 · 1⤊ 0⤋
you need a complete tune up sounds like to me
2006-08-20 18:09:19 · answer #8 · answered by dalmation60 3 · 0⤊ 1⤋
hate to tell ya but age has everything to do with it
2006-08-20 16:57:21 · answer #9 · answered by Anonymous · 0⤊ 1⤋
carb problems
2006-08-20 16:58:05 · answer #10 · answered by ? 7 · 0⤊ 1⤋