Gas questions

[Lofty]

Okay, I have a few questions.
1st off. How many gallons can go in my tank? I don't have my manual with me.
2nd. Would a bad o2 sensor+my isc disconnected get me bad gas mileage?
I mean I had a half a tank, I drove like 20 minutes round trip, then I have a little more then a quarter of a tank, is this right?

 

[Boost92awd]

Yes change your o2 sensor. Make sure your plugs and wires are good. Make sure your air filter is clean. What are you getting for MPG rite now?

 

[Lofty]

Yes change your o2 sensor. Make sure your plugs and wires are good. Make sure your air filter is clean. What are you getting for MPG rite now?

I'm not too sure, I gotta know how many gallons my tank holds.
My wires might be toast, I am running a new K&N Air filter so it isn't that.

 

[Whophlungpoo]

Okay, I have a few questions.
1st off. How many gallons can go in my tank? I don't have my manual with me.
2nd. Would a bad o2 sensor+my isc disconnected get me bad gas mileage?
I mean I had a half a tank, I drove like 20 minutes round trip, then I have a little more then a quarter of a tank, is this right?

Yes, change your o2 sensor.


How fast were you going for those 20 minutes? Going into boost much or no?

 

[Boost92awd]

^ Hes non-turbo.

OP you dont need to know how much your tank holds to figure out your gas mileage. Fill up your tank, drive it for 100-200 miles fill it back up. Then divide your mileage by how many gallons it took to fill up your car.

 

[Lofty]

^ Hes non-turbo.

OP you dont need to know how much your tank holds to figure out your gas mileage. Fill up your tank, drive it for 100-200 miles fill it back up. Then divide your mileage by how many gallons it took to fill up your car.

Alright I'll do it.
I was driving pretty slow, shifting at around 2400k.
Nothing too serious.

 

[VETTE_50_TH]

WHY the hell is your ISC disconnected. Can your car even idle right?? Bad o2 gives off bad signals of if your car is rich or lean meaning it probably is dumping fuel it doesn't need.

James

 

[Lofty]

WHY the hell is your ISC disconnected. Can your car even idle right?? Bad o2 gives off bad signals of if your car is rich or lean meaning it probably is dumping fuel it doesn't need.

James

The ISC is fried, It stalls my car some how with it in.
Plus, I don't wanna blow my ECU with the extra load it's putting on it with it not working properly.

 

[VETTE_50_TH]

The ISC is fried, It stalls my car some how with it in.
Plus, I don't wanna blow my ECU with the extra load it's putting on it with it not working properly.

The signal is gives off is null. It wont hurt anything. What is hurting it is not having a good one on there.

DSMISC.com. <--- go there and buy one.

James

 

[Lofty]

The signal is gives off is null. It wont hurt anything. What is hurting it is not having a good one on there.

DSMISC.com. <--- go there and buy one.

James

I was told in another thread that a guy left it in and it blew 2 pins out of his ECU, He even showed me pics of the ECU.
I'll purchase one tomorrow I guess..
It runs better without it in though,

 

[VETTE_50_TH]

I was told in another thread that a guy left it in and it blew 2 pins out of his ECU, He even showed me pics of the ECU.
I'll purchase one tomorrow I guess..
It runs better without it in though,

That sounds shady. I dont know about that. Either way, your car needs a way to control the amount of metered air entering when the cars throttle plate is closed. And more than likely is causing your car to run rich/lean and thats why you shitty gas mileage. Change the 02, isc, plugs, and wires. Guaranteed way to improve your mpg.

James

 

[Lofty]

That sounds shady. I dont know about that. Either way, your car needs a way to control the amount of metered air entering when the cars throttle plate is closed. And more than likely is causing your car to run rich/lean and thats why you shitty gas mileage. Change the 02, isc, plugs, and wires. Guaranteed way to improve your mpg.

James

Alrighty, thanks James.

 

[VETTE_50_TH]

Yep. Anytime. Report back with how everything turns out.

James

 

[Lofty]

Yep. Anytime. Report back with how everything turns out.

James

Gotcha,
Oh yeah, I wouldn't expect anything else from you.
You've always been a good help to these forums, thanks for that.

 

[eeeewidner]

^ Hes non-turbo.

OP you dont need to know how much your tank holds to figure out your gas mileage. Fill up your tank, drive it for 100-200 miles fill it back up. Then divide your mileage by how many gallons it took to fill up your car.

This is the correct way to figure out mpg.

As of your sensors being unplugged. Yes they play a huge role on whether or not you want ok gas mileage... With your 02 sensor not sending a signal back to the ecm, the ecm automatically thinks that it should keep the fuel enriched instead of allowing the sensor to fluctuate from open to closed loop every 2-5 seconds. Thus resulting in poor fuel economy..