89 240sx gas milage

[1989240sx]

Hi guys, I have a 89 240sx with a stock engine and i would like to get better gas milage i am getting around 19 MPG right and that is a mix of in town and freeway. I was wondering if there is something that i can do that would be easy to get better gas milage ? i am alos wondering what can i clean to help out with idle. Sometime it idle really rough and dieds too

[johntom240]

header,full 2inch exhaust no cat or hi-flow, straight thru muffler, 2.75"cold aire intake( make yourslef a box around the filter and utilize the stock airbox fresh air tube for best result) clutch fan delete get sum altima electric fans, light weight flwhyeel,aluminum driveshaft and get 4 lug aluminum rims with 185/65/15 tires ,5 spd if it isnt allready and uhh get urlsef some new injectors for that idle problem if u do all that u shud get like 30mpg on the highway

[1989240sx]

i think someone has change the exhaust to 2 1/2 not sure about the cat but the stock headers are still on there and i have a injen cold air intake but i dont have it install at the moment and i have aluminum driveshaft. When i get my taxes but i might have to go with new rims, altima electric fans, and new injectors. If I do it all what would i get in town ??

[AZ89two4Tsx]

^ Probably not much better. Maybe a mile or so per gallon at the most. Get the idle fixed first and make sure it's not running too rich.

Around 20 in town is normal. If you're doing 70 on the highway, I wouldn't expect much better. The KA, especially a single cam, isn't exactly known for its stellar gas mileage.

Spell check is your friend as well. Reading your guys' posts is quite painful.

[Hooked on 240]

intake/header/echaust. and seafoam that thing! made a world of difference for my last couple 240s

[95zenki man]

I would be more then happy with 19mpgs out of a 20+ year old car...i got maybe 15 out of my sohc...

[1989240sx]

what would be the best place to get new injector ?? also my car dead today at a stop light when i was stopping for it. do you guys why it would do that ?

[1989240sx]

does anyone know where the best place for new injectors is ???

[kyhunter89]

my sohc, 5speed coupe with 205/65/15s get 22mpg and I think it should get more, runs rich and has an unsteady idle from 6-800

[95zenki man]

my sohc, 5speed coupe with 205/65/15s get 22mpg and I think it should get more, runs rich and has an unsteady idle from 6-800

Clean your iac and or maf also take your egr out and hit it with a little carb cleaner.

[float_6969]

Remove KAE, and install CA16DE. It'll take A LOT of work and money, but I'll bet you can get 35-40MPG!

[ricebike]

i'm getting ~26 mpg from my original engine with over 219,ooo miles on the odometer.

but that's mostly highway driving

[1989240sx]

yeah i get that on the highway the last time i did highway trip. So my question never got answer where would be the best place to get new injectors ?? I do have update i am now get 20 mpg which i do mostly in town driving. i think i am going to use the rest of seafoam which did help with the idle issue too

[float_6969]

Email Deatchwerks, they might have stock size injectors. They're one of our advertisers. I've done business with them multiple times and they're great to work with.

[ricebike]

So my question never got answer where would be the best place to get new injectors ??

oops, missed that one; why are you contemplating on changing them when you're pretty much in the ballpark for the mpg range?

unless they're leaking should be relatively cheap for this old KA24E nowadays.

I had 2 external leaks back in the late 90s, went on eBay or searched shopping links to get a full set & still holding up (knock on wood)

[1989240sx]

i am still having idle issues. it wants to dead when i stop not sure what the issue is

[biggie]

Did you clean the IACV? That is normally the cause of cutting off when dropping from higher rpms.

I would do all normal maintainance items before moding. New fuel filter, new O2 sensor, clean throttle body, check plugs/wires, etc, etc.

[1989240sx]

i have yet to clean the IACV. It has been a while since i have done the plugs, plug wires and O2 sensor.I think this weekend i will clean the throttle body and run some more sea foam through it. i will also clean IACV and see if i am up to cleaning the EGR. I am still think of getting new injector and see if that helps with gas milage. does the Ka24e have a slow throttle response ?

[1989240sx]

what do you guys think of Taylor Cable 94240 - Taylor Helix Power Tower Plus Throttle Body Spacers ?? does it really work ?? would i see any improvement of gas milage ?

[float_6969]

Never heard of it. I know throttle body spacers are popular in the V8 crowd?

[The_caveman]

I would be more then happy with 19mpgs out of a 20+ year old car...i got maybe 15 out of my sohc...

Since the new fuel pump and header i get like 15 or worse if im driving my car hard... no clue about lightly really before the header and fuel pump i'd say 22 mpg tops cruising like 65

[1989240sx]

i think i am going to try it out and see if it helps any. i figure if it does help inprove gas milage little bit in the long run it will pay for it self

[asoomal]

what do you guys think of Taylor Cable 94240 - Taylor Helix Power Tower Plus Throttle Body Spacers ?? does it really work ?? would i see any improvement of gas milage ?

Barely, throttle body spacers are a lot more efficient on carburetors since it helps mix the air and fuel together. All you're really going to do is create a swirl with an EFI car.

[s13sickboi]

33 mpg highway 80+ mph with my stock ka24de. Yeah I know ya'll are talking about the sohc but just throwing my numbers in

[ricebike]

throttle body spacers are a lot more efficient on carburetors since it helps mix the air and fuel together. All you're really going to do is create a swirl with an EFI car.

agree it'll be pointless on a KA24E. plus, if you still have the original intake runners, nissan already have placed butterfly valves/ swirl control valves there!

(see FSM if you don't believe me) specifically EF & EC-5 and note S.C.V solenoid

as far as your idling problem, check your vacuum lines? or how to clean the IACV?
(on the FSM, look at pages EF & EC-12 for the different names of this type of valve/s)

but as noted before, your mpg is under the "normal" range... you can switch to synthetic oils for motor/ trans/ differential to "help" squeeze more mpg from your tired engine, drive more conservatively, common-sense stuff

[1989240sx]

would an exhaust system help out at all

[ricebike]

[1989240sx]

i am using one step up from regular it seem to helping and i also got the throttle body spacer on too i will tell you guys if it helps any

[The_caveman]

He's not lying about those secondary butterfly's they are there I didn't even know they were there myself for the longest time.

[1989240sx]

where are they located at ? i also have other question my car is idleing higher than it was. It is idleing around 1500 in park and almost 1000 when it is in drive. what can i do to fix that ???