Mileage Question

[blackbonnie 5,000+ posts]

spark plugs, very easy

 

[memphis_vette 10+ year member]

well my corvette gets 28-31 (31 on a good day) and i only get about 18-20 in city...but i do also need to change plugs the car is a 98 and havent changed them since

 

[gladiator_jai 10+ year member]

What plugs are you talking about? And what wiring. Is this a do it myself thing? I have always wondered this.

I think he meant spark plugs

 

[memphis_vette 10+ year member]

yea spark plugs...take coil off top of spark plug, get ratchet unscrew plug plop new one in put coil back on...then ur done

 

[memphis_vette 10+ year member]

get a cheap chip 100-200 $ and that will make ur car more efficient on gas too...it programs car to run more efficently...not too sure how deep u wanna go in this MPG deal

 

[gladiator_jai 10+ year member]

Hmm thanks guyz, 1 last question, the fuel injector cleaner should be used before or after changing the spark plugs?

 

[gladiator_jai 10+ year member]

get a cheap chip 100-200 $ and that will make ur car more efficient on gas too...it programs car to run more efficently...not too sure how deep u wanna go in this MPG deal

not too deep, just want the city mileage to do better.

 

[memphis_vette 10+ year member]

use it b4 changing plugs sop then u have new fresh injectors and then put ur plugs in so u have both fresh plugs and injectors

 

[memphis_vette 10+ year member]

ok tha the above things should do the trick for ya

 

[MyFartsStink 10+ year member]

Hmm thanks guyz, 1 last question, the fuel injector cleaner should be used before or after changing the spark plugs?

Just whenever you fill up your tank. It really helped out my van as it was like vrum vrum vruuum vruuuuuuum vruum. You get the point. Now that is gone. I also heard that if you fill up your tank to 3/4 the way up with regular, then the rest with premium, it helps alot also.

 

[gladiator_jai 10+ year member]

thanks guys for all your help, appreciate it //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[memphis_vette 10+ year member]

hey no problem...lol it just got me thinking that i need to do sum plug changes myself lol...have a good one

 

[IgnoreMe 5,000+ posts]

spark plugs, very easy

not necessarily. some engines are just RETARDED to change plugs on (IE lincoln navigator //content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif, and the older chevy malibu v6)

secondly, doing a tune up is a great start but honestly no one can tell you straight up what the answer will be. for all we know you could have leaky fuel injectors. leaky fuel injectors will result in them working somewhat properly at highway speeds, but then as soon as you get down in city driving and have a lot of low rpm idling you're just dumping fuel. this is why it can result in normal highway mileage and shitty city driving.

one good way to check for leaky fuel injectors is to put the car in park and rev to about 3k and shut it off. then listen to how the engine comes down. if it stumbles on the way down thats a decent indication.

bad 02 sensors can cause bad gas mileage too, but they will throw check engines lights so if you dont have one, chances are its still functioning decently enough to be considered "good".

your map/maf (whatever your mfg decides to use on that car) can do the same, however again, it should throw a check engine light.

btw, just fill up with chevron instead of the fuel injector cleaner. believe it or not the "techron" they put into the gas is pretty ridiculous at cleaning. in fact it was so good at cleaning that the poppet valves on some GM engines we're destroyed because of it. GM was forced to warranty all of these engines for this up to 100k. believe it or not, techs reccommended customers use the chevron gas as much as they could before reaching the 100k warranty mark so that they got free replacement parts, and the techs got more work (this was back in the early 90's IIRC, so it doesnt apply anymore)

does the car run rough or smooth?

 

[Falder 10+ year member]

buy a new car. 191K is alot even if it is a Honda.

lol, I have a 91 accord aswell with 230K

Runs great.

 

[gladiator_jai 10+ year member]

not necessarily. some engines are just RETARDED to change plugs on (IE lincoln navigator //content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif, and the older chevy malibu v6)
secondly, doing a tune up is a great start but honestly no one can tell you straight up what the answer will be. for all we know you could have leaky fuel injectors. leaky fuel injectors will result in them working somewhat properly at highway speeds, but then as soon as you get down in city driving and have a lot of low rpm idling you're just dumping fuel. this is why it can result in normal highway mileage and shitty city driving.

one good way to check for leaky fuel injectors is to put the car in park and rev to about 3k and shut it off. then listen to how the engine comes down. if it stumbles on the way down thats a decent indication.

bad 02 sensors can cause bad gas mileage too, but they will throw check engines lights so if you dont have one, chances are its still functioning decently enough to be considered "good".

your map/maf (whatever your mfg decides to use on that car) can do the same, however again, it should throw a check engine light.

btw, just fill up with chevron instead of the fuel injector cleaner. believe it or not the "techron" they put into the gas is pretty ridiculous at cleaning. in fact it was so good at cleaning that the poppet valves on some GM engines we're destroyed because of it. GM was forced to warranty all of these engines for this up to 100k. believe it or not, techs reccommended customers use the chevron gas as much as they could before reaching the 100k warranty mark so that they got free replacement parts, and the techs got more work (this was back in the early 90's IIRC, so it doesnt apply anymore)

does the car run rough or smooth?

It runs pretty smooth.