Question about 1996 Plymouth Neon

1 Answer

1996 Neon is blowing black smoke from the exhaust.

When hooked to a computer, the head code says 171. I've replaced the fuel pump and upstream oxygen sensor, but still having this problem. Car doesn't run well, it jerks when driving.

Posted by on

  • 1 more comment 
  • bish7 Jan 01, 2009

    We are using 87 octane of new fuel. What do you mean by fuel getting dumped? We changed fuel pump because car was jerking as if it wasn't getting enough fuel. What's the solution? Thank you!

  • Mike Butler
    Mike Butler May 11, 2010

    Black smoke obviously a case of too much fuel getting dumped, why did you change fuel pump?

  • Angelo Attard
    Angelo Attard May 11, 2010

    what fuel are you using and how old is it

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Plymouth Master
  • 6,674 Answers

If good, clean fuel, good spark etc. 171 is lean mixture according to my sources.. Thus I'd say if engine is being told from O2 sensor that mixture is lean, that would explain all the extra fuel getting ( dumped ) fed to engine. I guess i"d start by changing O2 sensor. (Oxygen sensor.) If it has 2, do the one upstream, closest to engine on exhaust manifold or pipe.

Posted on Jan 01, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Where is the O2sensor bank 1 at with a code of P0420. AND do I need to replace both sensors upstream and down. Or just the one that is showing up on the obd scanner.


Bank one is front side of cat. It should also tell u if it's cat 1 or cat 2. Depending on make an modle an yr. Catalyst 1 bank 2 is left cat back sensor. Catalyst 2 bank 2 is right cat back sensor. U do not have to replace upstream also. My o2 sensor Catalyst 2 bank 2 went bad. Had engine code for burning rich bank 2. Replaced tha down stream sensor an fixed problem runs better an better gas. This was in 97 gmc suburban. Idk what vehicle ur askin about. An I'm not to familiar with much about cars jus trucks an suvs.

Jan 02, 2017 | Cars & Trucks

2 Answers

How can i reset the 2007 Pontiac G5 ECU after changing the Oxygen sensor upstream.


What was the original code ? Did it have the work circuit anywhere in the code description ? Circuit low or circuit high ? An what are the seven codes you pulled now?

Oct 11, 2016 | 2007 Pontiac G5

1 Answer

4.0l 6 cylinder. What are the probable causes of DTC P0171?


no. (but the isc valves loves to stick but will not cause black smoke)
the 4.0L is one of 5 million made, it's well known,
the black smoke don't lie. it's rich and the cat seems burned up too.
as with black smoke the cat will try to catalyze all that and glow red hot. is your cat missing?>
so why not believe the code 171, its real and is catastrophic failure. there are 2 engines here, FED and California.(exhaust)
(2 different exhausts and sensors there.
as they say, fix what is OBVIOUSLY bad, 171
(find why using tools or inspections)
Fuel System Lean (Bank 1)in most cases the exhaust is cracked near B1S1 0xy sensor
this causes it to stick at 0volts, (lies) and the PCM sees that obvious lie then goes rich. (limphome rich)
if the pcm cant measure oxygen, it must now guess at fuel trim.(bad that.)
it goes rich, so you dont melt pistons running lean.
(by design)

bad front oxygen sensor (aka , up stream bank 1)
in calif cars, it can have a split exhaust on the I6 and have 3 sensors. (hope not yours, do look..)
most have 2 sensor, front and the useless behind cat sensor(B1s2)
S2 is useless for running mix, the rear is for smog test the cat.

so it rich, and now misfires. and the spark tips are black.
and it misfires to bad it can even idle, sure. (Drops)
the cause, is too rich.
the 171 means the PCM sees it stuck at 0v forEVER.

there are in fact other causes.
but these 2 are top cause.

on all 3 of my 4.0L engines
the exhaust manifold cracked on the under side.
side facing block. (i use a hose to ear to hear the putt putt puts, (with FULL PPE protection from burns from a dead cold engine.) ask how.
even the SST exh. man. did that.

or the header flange gasket is TOAST. (that too putts when bad.)

Aug 03, 2015 | 1996 Jeep Grand Cherokee

2 Answers

I've got a Peugeot 407 HDi 2005 now with a power loss, particularly obvious in low rev range, blowing black smoke - looking like excessive fuel input. Also, it is using a huge amount of fuel.


Is it a diesel. If so it could be the particulate filter blocked, or it could be a failed fuel pump or something internal of the pump, or if a petrol it could be a failed catalytic converter, undo the exhaust and see if that changes, if so then look closely at your exhaust.

Dec 24, 2014 | Peugeot Cars & Trucks

1 Answer

2002 ford windstar engine lean bank 1 and lean bank 2


Google your codes & then diagnose the
system & items related to the codes

Type: OBD Code PO 171 --or whatever the codes are

If you have Oxygen Sensor Codes, it is most likely the upstream sensors have failed, because you did not know they get replaced as preventative maintenance at 100,000 or when they fail, if that is how you take car of your vehicles

Aug 26, 2013 | 2001 Ford Windstar

1 Answer

I replaced the ignition coil,fuel filter and oxygen sensors on my 2001 daewoo lanos..i am still having problems with the car not wanting to go up hills. when i drive the car on flat surfaces it runs okay.....


You use Google for any codes you get


TYPE:: OBD Codes PO303,PO171 etc

You have either replaced a good coil or you have more than one bad one

The fact you got a 303 doesn't mean #3 cylinder has a bad coil
but most likely it does

The 171 is more than likely unrelated & failed oxygen sensor

The O2 Sensors should be replaced at 100,000 miles on all vehicles ( just the front upstream ones)

Aug 24, 2013 | 2001 Daewoo Lanos

1 Answer

Po302 po304 po307 po171 codes are showing up, any ideas?


PO 301 thru PO 308 are engine cylinders with possible
misfires & bad coils

PO 171 is a lean condition on Bank# 1 oxygen sensor

If the front or upstream sensor are over 100,000 miles, change
them as preventative maintenance

The cylinder misfires have to be diagnosed & tested any of
several ways,professionally for the most part

Jan 15, 2013 | 1999 Lincoln Town Car

1 Answer

2006 xj8 code po 171 engine light is on


Lean report from right side bank #1 oxygen sensor

Replace both sides upstream sensors if over 100,000 miles

They slow down & set a mil lamp

Leave the rear monitors

Dec 02, 2012 | 2001 Jaguar XJ8

1 Answer

I just replaced the head in my 99 neon and i'm blowing white smoke from the exhaust. What's the problem


You are burning coolant, the head gasket can be put on Wrong, If your looking at the engine the right rear corner is the only oil passage for the head, you will see a difference in that corner of the head gasket. If your sure that the gasket is on right you may have a warped or cracked head or improper torqued head, all head bolts MUST be replaced when you do a new gasket cause the bolts stretch when torqued. The spec is 25, 50 then 50 then 1/4 turn for the bolt torque.. Make sure u start from the center of the head.

Jun 10, 2012 | 1999 Plymouth Neon

1 Answer

I have an '02 VW Cabrio that is giving me random 171 and occasional 102 OBD codes. I looked for and found a split hose near the air filter housing and replaced. I've not found any others with...


1st have you replaced the O2 sensor? Here is the technical stuff about this fault code
OBD 2 fault code P0171 VOLKSWAGEN - Fuel control System To lean engine cylinder bank number #1.
Possible causes:
Possible causes- Intake air leaks, spray propane around the intake manifold gasket and all vacuum connections and listen for a change in the engine idle speeds, any change indicates a leak.
- Faulty front heated oxygen sensor (a common cause if the car has over 50,000 miles on it)
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure Hook up a fuel gauge and make sure the fuel pressure is good/in specs under a load.
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection

Oct 02, 2011 | 2002 Volkswagen Cabrio

Not finding what you are looking for?
1996 Plymouth Neon Logo

Related Topics:

152 people viewed this question

Ask a Question

Usually answered in minutes!

Top Plymouth Experts

yadayada
yadayada

Level 3 Expert

70387 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22041 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6879 Answers

Are you a Plymouth Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...