why am i getting 150miles out of a tank?

[Zboner]

98ls1, auto, tranny just rebuilt, the engine is making some noise now like a knock. and i do not let the rpm's over 2,000. and im using 93 fuel, so why the hell am i getting 150miles out of a tank

[Sarge]

Zboner you lil shit..... what are your air/fuel ratios throughout you RPM bands....
Who is your tuner and do they have experiance with an LS1? Give us a bone man.....

[Zboner]

the thing is stock amlost has no tunning yet, only had it for 4 months now, but these are the guys that will do my work check it out http://www.ts-performance.com

[Sarge]

Well shitfire....take it to these folks and let them get it up on the dyno and see what the hell is going on.....Or do you want us all to guess...Zboner...you lil shit...what are we gonna do with you? Have them look at it and tell us what they "find".....or write me a check for about $65K and you can terroize all of your city
Or change the spark plugs....

[Zboner]

you crack me up man, i got to meet you one of these days.

yea the car is under warrenty still, hope i can talk them into talking the warrenty people into a new engine

or just give you 30k and see if you can squeese some hp out of it

[MadSeason]

by chance is the service engine soon light on? does it lightup when you start the car so you know its working?

[Zboner]

by chance is the service engine soon light on? does it lightup when you start the car so you know its working?

yes it lights up when i start the car. but has nevr came on. and does not stay on, what you think it is

[MadSeason]

Well if it's all city driving with the AC on you're not going to get that great of mileage (12-15 MPG sometimes ). A few things I'd look into are: a fuel injector cleaner, new fuel filter, new plugs and wires, check the air filter, run an engine cleaner (amsoil engine flush AEFCN), and change the oil. Other than that check the exhaust to make sure you didnt bottom out and kink something. Can't think of anything else right now but good luck

[Zboner]

changed oil last week, never run air, all highway driving

[BlackTAWS6]

Dont let the car run over night!?! Helped me out with mileage

[Zboner]

ok, they said to change my plugs and wires that it may be the problem,if not to come back up,

but i removed the screen from the mass airflow sensor. could that be it?

[BIG D's SS]

When I changed my mass air halves it didn't hurt my mileage. The only problem I had was the oil from the k&n getting on the maf sensor throwing a code. Fixed that not so much oil next time.

[Zboner]

it didnt throw a code or anything at all i just think it is need of a serious tune up thats all.

[BIG D's SS]

[Zboner]

i need taylor wires, what are some good plugs? i know they need to be 45's and gapped to 43 right?

[Deviant Hawk]

1-When you descreened your MAF, if you hit the the little sensors in the center at all you could have very well screwed them all up and A/F ratio is all jacked up. You'll need a new MAF.

2- Also it could be your TSP or TPS (can never remember the order) sensor. I have 2 buddies who both had '98s and they would only get like 130 miles to a tank.

3-Best plugs would be Iridium NGK TR55's. Already pre-gapped, no worries.

[SeVeReDiStOrTiOn]

yea the tr55IX plugs are awesome....have fun changeing the plugs though, trust me you'l never forget it

[Zboner]

yea the tr55IX plugs are awesome....have fun changeing the plugs though, trust me you'l never forget it

i spent an hours changing the easiest plug last night, i thouhgt it was not worth it, so i m haveing a shop do it for $70 to me thats worth it.

[FSANE]

I get about 160 mile on a tank, so dont feel bad lol

[Zboner]

how? my engine is stock?