e30 '90325iC its eating too much gas

[92 mtechnic cabrio]

fuel pump/tank gasket?

[nando]

The fuel pump relies on fuel for lubrication. Letting it go until it loses its prime is ASKING for trouble.

sure, but it's not going to go up in smoke unless you make a habit out of it, or if it was marginal in the first place.

like I said, I've done it several times, pump is still fine.. 216k too.

[beybedba]

Miles per gallon is a calculated value involving the variables of speed and engine load. You are going to get worse mileage at lower speeds. You can't "tune" your car to get the same MPG in the lower gears.

Since this had to be explained to you, I think you need to take your car to the mechanic, as you could have a very dangerous fuel leak. On second thought, is there any other kind? Take it to the fixer, I think this is over your head.

thanks thanks thanks

[Beach Bum]

no it won't, not unless you never go below 1/4 tank and you have crud built up in there. done it many times.. ;)

The fuel pump relies on fuel for lubrication. Letting it go until it loses its prime is ASKING for trouble.

[nando]

^ running your car until you run out of gas will fuck up your fuel pump. Dont do it. Swap in another fuel level sender from the pick ur part

no it won't, not unless you never go below 1/4 tank and you have crud built up in there. done it many times.. ;)

it really sounds like a fuel leak. even when my engine was tuned pig rich (11-12:1 on the whole map) I still got 12mpg. 44 miles on a tank means something else is going on.

[Beach Bum]

btw, the leak that i found wasn't a gas leak. it turns out to be the transmission fluid.

like what i said at the start of thread, the car was converted from 2.5 to a 2.7 stroker, it has a dinan 900-2532 chip and a K&E Intake and the camshaft is on a 288. whenever im on 1st, 2nd and 3rd gears i noticed awhile ago that the MPG lever on the speedometer points at 10-13MPG (1.5K-2.5K RPM). however when i go to 4th and 5th gear it would actually points at 23-25MPG (2.0K-3.0K RPM).with all the modifications done in the car, how would i tune the car so that even in lower gears it would not consume much fuel. is the chip installed in the car isn't really compatible with the 2.7stroker?

i really don't know much about cars and i'm so sorry if i ask so many questions....

thanks for reading and leaving advices.:D

Miles per gallon is a calculated value involving the variables of speed and engine load. You are going to get worse mileage at lower speeds. You can't "tune" your car to get the same MPG in the lower gears.

Since this had to be explained to you, I think you need to take your car to the mechanic, as you could have a very dangerous fuel leak. On second thought, is there any other kind? Take it to the fixer, I think this is over your head.

TS87325IS: You didn't mention the bottom end swap in that sentence though, did you? It's a pointless argument anyhow and I shouldn't have made that post; I only made it because I wanted to point out your error to the OP, who seems to know not as much as I/we/us other people do.

[beybedba]

do you guys have any idea how to tune the car for a better gas consumption given the mods in the car? my friend told me that if you smell the gas from the hood that's mean there's a leak in the exhaust. is that right?

[TS87325IS]

Uh, wrong? Intake and tune doesn't magically increase cylinder volume. However, depending on the tune, it may consume more gasoline.

no , you are right , but changing from a 2.5 bottom end to a 2.7 bottom end dose , then putting the less fuel efficient mangement on the larger bottom end dose as well.

[TS87325IS]

i need to call the previous owner when was the actual last tune up done. as far as the parts under the hood, everything was nearly new.

I would also ask him about the gas milage as well , he may tell you that it guzzles.

[beybedba]

btw, the leak that i found wasn't a gas leak. it turns out to be the transmission fluid.

like what i said at the start of thread, the car was converted from 2.5 to a 2.7 stroker, it has a dinan 900-2532 chip and a K&E Intake and the camshaft is on a 288. whenever im on 1st, 2nd and 3rd gears i noticed awhile ago that the MPG lever on the speedometer points at 10-13MPG (1.5K-2.5K RPM). however when i go to 4th and 5th gear it would actually points at 23-25MPG (2.0K-3.0K RPM).with all the modifications done in the car, how would i tune the car so that even in lower gears it would not consume much fuel. is the chip installed in the car isn't really compatible with the 2.7stroker?

i really don't know much about cars and i'm so sorry if i ask so many questions....

thanks for reading and leaving advices.:D

[beybedba]

How about you go to a gas station, fill up your tank, divide the miles traveled by the gallons into the tank and get back to us after that. You have no idea what your fuel consumption is right now.

i was actually thinking the same thing. however instead of filling up the tank. ill wait for the car to reach the red marker then ill put up about a gallon.from that i can calculate how many miles would the car can go.

[tjts1]

How about you go to a gas station, fill up your tank, divide the miles traveled by the gallons into the tank and get back to us after that. You have no idea what your fuel consumption is right now.

[Beach Bum]

also , you having more displacment now with the I intake and management , it will consume more gas.

Uh, wrong? Intake and tune doesn't magically increase cylinder volume. However, depending on the tune, it may consume more gasoline.

[M-technik-3]

It's a bigger pump it requires more fuel.

[beybedba]

also , you having more displacment now with the I intake and management , it will consume more gas.

i understand that but i don't think it would really have a drastic change.