Well i brought this up before but its becoming a pain in my a!@. My gas mileage has drop dramatically.. and now everytime i take off it stutters and bogs down to where it almost dies then picks up and goes... im stumped and need help

 

Your shirt is too heavy.

You want to give us a little more to go on...?

 

Like what i told yall

 

Well when i take off in my jeep its bogs down and wants to die. I have to press the gas and it still wont go and stutters then clears up and runs fine.. and my gas mileage has been getting worse.

 

Have you replaced your O2 Sensors?

 

No i have not

 

I recommend replacing both upstream and downstream Oxygen Sensors. This may cure both of your problems.

The original equipment was NTK sensors. They work very well.

NTK Upstream O2S part number 23151, downstrean 23099.

Rockauto has them (maybe the cheapest around).

http://www.rockauto.com/catalog/rafr...rttype=5260&ck[ID]=0&ck[idlist]=0&ck[viewcurrency]=USD&ck[PHP_SESSION_ID]=1ko2qvtkli0ac59gp3ovgjg1d4

 

I can get them at napa for basically free

 

Cool!

Make sure you get them by part number. They are exact fit. Never use universal fit O2S's.

Good luck.

 

Ill go off what u gave me

 

Its a lean condition for sure, when you step on it theres not enough fuel, your bad gas mileage is the computer adding fuel trying to correct the problem. Id check fuel pressure. any check engine light on? could be some bad sensors. Could be low fuel pressure do to bad pump... etc. Id make sure your getting a strong spark too while your checking things.

 

The check engine light comes and goes

 

Being a 97, its OBDII so you can get the code scanned for free at a local auto parts store. I would scan it and post up the code you get. likely that will lead you right to the problem.

 

Where does the computer get its information to know the engine is running lean and how much fuel to add?

 

I had something very similar in my 95 shed chug and back fire and accellerate like crap. Replacing my 02 sensor solve it completly and gave me 2 mpg back