so the i got the car in my sig.... and i bought it from a guy and he bought it brand new... the car has 117xxx miles on it and he said he never changed the plugs or wires.... as of right now on the Hwy i am getting about 180 miles per tank and about 160 miles per tank in the city... is this normal??? cause i dont think so.... and if i do change my plugs and wires what kinda change should i see if any? Also what plugs and wires should i go with. please chime in guys..

Thanks in advance!!!!

 

thats EXACTLY what i get. see mods in sig.

you've got a 5.7L V8 buddy. lol. it isn't a baby bmw engine. its a man engine.

 

Sounds on the low side to me. Do you have a heavy foot?

Regardless of what mpg you get, at that mileage, it's wise for you go swap in new plugs, wires, and a coil. I'd even throw in a new opti, but that's just me.
Also swap in some new o2 sensors, clean your MAF, change your fuel filter, change/clean your air filter. That should help give you some better mpg's.

 

you're talking about a complete tune-up there.

the cost of that would totally offset the money you'd be saving from getting better gas milage. lol do you know how long it'd take you to save 500 dollars worth of gas?

i mean, if you plan on keeping the car for YEARS - then yeah, do it. but i think it's safe to say that gas will hit 5$ a gallon by next year, and nobody will be holding on to their LT1s.

 

Two words...routine maintenance.

 

yeah i knida do got a heavy foot lol.... i am about to change plugs and wiresis there any tricks yall can give me? ... how much is a coil? and is my fuel filter in the tank or is it in-line? i cleaned my MAF and descreened it.... and i am saving up for a good opti spark... and i am pretty sure my air filter is 15 years old also....so does anyone know any good plugs or wires for my setup??? any prices???

 

Get:
NGK TR55 plugs - they are like 1.99 a piece
MSD 8.5mm wires - maybe a 100 bucks for the set? don't remember
Fuel filter is in-line - like 10 bucks?
Air filter - Get a new paper filter or a K&N performance filter
Coil - like 30 bucks i think?

Tricks for plugs and wires...determination!

While you are doing routine things, might as well get a new PCV valve, it's like 10 bucks, you can change it in a min.

 

Thanks so much man!!! i will let you know after i get this changed!!!!

 

how much of a difference do new plugs make? I'm not sure how old mine are...

do you have a link to buy those(NGK TR55 plugs) online?

 

Could be something, could be nothing, but it definitely won't hurt anything. They are wear items, they have to be replaced anyway, and at 100K+ miles, I'd recommend it.
You can get TR55's at Autozone for ~2 bucks a piece.

 

sweet. ill do that.

my wires are red, so im assuming they've been replaced at one point. i'm at 90k miles

 

ok i cant find the NGK 55's. theres "laser" "lx" "gp".... which one anybody got a link?

 

NGK TR55's. They will have "V-power" on the box. Part number TR5.

Here's a pic:
http://www.amazon.com/gp/product/ima...1&s=automotive

 

ok i got the link

http://www.autozone.com/autozone/cat...estions=%5B%5D

 

I average about 17mpg with the mods in my sig.. when im easy on it.

 

probably about 20 on the hwy though, until the 4.10's go in soon lol........

 

yup my car averaged 17-20 depending on my foot

 

I'd also tidy up any air leaks that you might have around your headers, y pipe etc. they can cause a rich condition and cause the pcm to dump in too much fuel!

 

Ive gotten over 300 miles on one tank in my old formula. camaro gets around 250 with the 373s, Id definitly do some maintenence and get those mpgs up.

 

yeah when i get outta my car i can smell some fuel i think its a little rich.... how much gas u think i am losing?