Have a town and country 94 3.8 it wont start. Acts like a lean condition. Pops by the intake. I crank it it turns but it wont stay running. new O2, checked TPS good. what else should I check?

Po171 is a lean code.
Miscalibrated 02 sensor-- exhaust leak
intake vac leaks or incorrect map valve
or low fuel pressure/volumn.

Can you scan for any codes? Do you have any fuel pressure?

Have you had the vehicle scanned for codes?

Lincoln town car paper clip code trick1

Lincoln town car paper clip code trick2

Once you have the codes, you can look them up on the web. Just do a search ' 94 Lincoln town car code.....' Just plug in the code(s) number.

rpm sensor bad this keeps the car from over tacking.

can i buy a comma? says Vanna White, LOL !, i cant understand that.
brakes up pops? the cars foot service brakes, fail?

new coil, car has 10 or more coils which one, is a problem.
no year stated (fail)
no engine option stated (fail ) and country. fail 3.
Jeeps are sold all over earth, in 3 types. and postal an police, (5)
1984 ? 2001? i6? v6?
the only word i found , clear was pops

this is back fire, but to intake side or exhaust.?
intake side is bad spark timing.
exh side is gross over fueling and cracks in the exhaust pipe,
causing what is called, muffler explosions... loud report
the intake pops are back fires and is a not so loud , cough. sound.
or hickup
induction back fire is 90% bad ignition, and 10% causes by huge lean conditions.
Engine posts:
does it run bad, cold , hot engine or both?
does the engine run bad, even raced, in neutral , or cold.?
does the engine misfire at any time. say when?
does the engine bog, (lost power up hills or any time)? explain when.?

DTC P0171 - System Too Lean (Bank 1)
Basically this means that an oxygen sensor in bank 1 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1.

Note: This DTC (Diagnostic Trouble Code) is very similar to P0174, and in fact your vehicle may show both codes at the same time.

I would suggest that you take a look at the front oxygen sensor. Typically speaking the oxygen sensor causes this code to appear. Here is the possible cause list from the manual for your car.

Trouble Code: P0171 (2.5L V6 Auto) - Fuel System Lean (Bank 1)

Possible Causes:
Air leaks in intake manifold, exhaust pipes or exhaust manifold
Base engine mechanical problem causing a lean A/F condition
Fuel control Sensor is out of calibration (e.g., ECT, IAT or MAP)
Fuel delivery component fault (clogged filter, low fuel pressure)
O2 element is contaminated, deteriorated or it has failed
Vacuum hose is disconnected, broken, leaking or loose

Hope this helps (remember to rating this answer ans leave us a testimonial comment). Thank you for using FixYa.

A lean condition is the O2 Sensors (oxygen) reporting
a lean fuel mix:eg not much gas,mostly air

That would usually be caused by a vacuum leak
not a bad O2 sensor

You may have a fuel pump failing,thus taking out
fuel,you get a no start and lean O2 readings

You need to be a car doctor,not a mechanic
for this.

You could also have EGR Valve issues,letting
in too much exhaust gases
A worn TPS Sensor and loosing throttle position
Worn out O2 Sensors--over 100,000 miles on them

you have a bad intake gasket are a platuim gasket under the throttle body give these websites a try www.alldatadiy.com and www.autozone.com if all fails stop by your local library and get your hands on a Haynes auto repair manual for your car wish you the best of luck Michigan Man.

check the starter again by banging on it with a hammer it could be defective starter if not check your crank shaft position sensor

Running extremely lean. Did you replace the 02 sensors? They detect lean and rich conditions and if the previous problem was too rich, the 02 sensors may have set ecu to run lean because of their problem. Now converters are free flowing and the settings should have again adjusted itself if the 02 sensors haven't flaked out. Overheating is and a fire hazard.destrucive to a converter and as hot as you say they are getting is not good. Do this, in the intake ducting is a sensor call a maf sensor. It's in a metal section. See how dirty it is. Then buy a spray can of CRCelectrical cleaner and spray wash the sensor thoroughly. Do not touch, rub, or brush the sensors, Just rinse dirt away with spray. The sensor is delicate, sensitive and very expensive to replace. DO NOT USE COMPRESSED AIR! The spray will dry quickly. Good Luck and make sure you have a clean air filter. Let me know if you will please.Ned