Hey guys , i just installed my A/F Guage and Vac Guage, i dont think my A/F Gauage is working right though on idle it just sits on lean and when i drive it sometimes it jumps around steadily and sometimes it just doesnt move at all, could this be my Oxygen sensor and explain why i get wierd hesiation from 2-3k and 6-7k , my tps is adjusted and all my electrical plugs are clean , i dbout i have a vac leak too . Shouldnt the oxygen sensor stay steady?

 

That's only if you bought a wideband A/F gauge. A/F gauges working with your stock O2 sensors are of the narrowband type and the gauge will jump around. The only place of use for a narrowband sensor is right at the crossover point between lean and rich. As long as your gauge is showing that you're on the correct side of lean/rich, then it's working fine.

 

it is normal operation.. the stock nb o2 sensor is really only a 2 position sensor.. below 14.7 or above 14.7 afr

 

What could cause my hesitation then, i barely get it from 6-7k sometimes its the 3800 hesitation , i had it yesterday , i cleaned my AFM plug , TPS plug , and my relay plugs , it seems to have almost dissapeared , my TPS is adjusted to spec also , my injectors were checked too?

 

About your narrow band/stock sensor and gauge.......IF the car still has an airpump and ACV, then that expalins the LEAN showing at idle.

The ACV directs air to the exaust port sleeves and into the exaust as it leaves the engine. That fresh air leans out the *fumes*. The 02 sensor is downstream of the exaust ports so it sees a lean condition.

On a normal/stock engine, you can look at this *lean* reading on the gauge, and then if you go pull the BLUE connector off the Relief solenoid, the *lean* reading will now go *rich*, because that action of removing the plug made the relief valve inside the ACV cause the airpump air to be dumped overboard into the fender area instead of the exaust port.

If your engine does not have a ACV and airpump, then the gauge or 02 sensor/wiring is at fault.

 

Check All Your Gronds I Had That Same Hesitation And I Checked Everthing! So I Started To Check My Grounds And The Bell Housing Ground Was Loose Check That And Let Me Know!!!