Question about 1990 Ford F350

1 Answer

1999 Ford E250 van Rough running

My code anylizer says
PO171 = System too lean (Bank 1)
PO302 = Cylinder 2 misfire detected
PO304 = Cylinder 4 misfire detected
PO308 = Cylinder 8 Misfire detected

What can I try

Posted by on

  • 3 more comments 
  • Anonymous Mar 12, 2014

    The service engine soon late has been for about 1month then a few days ago when I left work the car was running like always I had to stop fast and every since then the car runs very rough and even rougher when take off. and if stopped to long it feels like the car is bubbling. Stop at o"reilys to have codes done and the codes are cylinder 6 misfire detected but gives no possible cause available and the other code that comes up is Trouble code P0410 and No possible cause available. so I am trying to find out what the problem is so I can decide if I fix the car or not. Thank you

  • Anonymous Mar 15, 2014

    misfire cylinder 8

  • Anonymous Mar 21, 2014

    It is having a misfire in the number 8 cylinder, and I would like to change the number 8 cylinder however I am unsure of how I would do so myself.

  • Anonymous Mar 21, 2014

    I am wanting to change my number 8 cylinder due to the misfire issue, however I am unsure of how to do this can anyone help me with this.

  • Anonymous Mar 23, 2014

    misfire codes PO300,PO301,PO302,PO304,PO316 its a 2.0 spi sohc engine

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,055 Answers

Complete tune up plugs wires distributoe cap and rotor

Posted on Jan 24, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

I would like to know what these codes mean


P0171 System Too Lean (Bank 1)
P0174 System Too Lean (Bank 2)
P0301 Cylinder #1 Misfire Detected
P0302 Cylinder #2 Misfire Detected
P0304 Cylinder #4 Misfire Detected
P0306 Cylinder #6 Misfire Detected

Mar 12, 2014 | 1999 Ford Explorer

1 Answer

Check engine light obd code po171,po300,po302,po303 1997 camry 2.2 ltr.


PO171 OBD2 Code basically this means that an oxygen sensor in bank 1 has 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. The P0171 is one of the more common trouble codes.

his code is triggered by the first downstream (front) O2 sensor. The sensor provides a reading of the air:fuel ratio leaving the engine's cylinders, and the vehicles powertrain/engine control module (PCM/ECM) uses that reading and adjusts to keep the engine running at that optimum ratio of 14.7:1. If something is not right and the PCM cannot maintain the 14.7:1 ratio, but rather there is too much air, it triggers this code.

Nov 06, 2012 | 1997 Toyota Camry

1 Answer

Rough idle vibrates and po171 code service engine soon. jamesrowland9@aol.com


Hi, a Ford P0171 is a LEAN code for cylinder bank 1, and P0174 is a LEAN code for cylinder bank 2. These codes commonly occur on many Ford vehicles, and are set when the powertrain control module (PCM) sees the air/fuel mixture is running too lean (too much air, not enough fuel).
When the Check Engine Light comes on, either one of these codes, or both, may be found when a code reader or scan tool is plugged into the vehicle diagnostic connector. IF the vehicle is driven long enough, typically both codes will be set.
A P0171 lean code for bank 1 is the cylinder bank on the RIGHT (passenger) side of the engine on Ford vehicles with a V6 or V8 engine and rear-wheel drive.


A lean fuel condition may exist if the engine is sucking in too much air and/or the fuel system is not delivering enough fuel. If bad enough, a lean fuel condition may cause lean misfire, a rough idle, hesitation or stumble when accelerating, and/or poor engine performance.
Unmetered air can enter the engine through a vacuum leak, a dirty airflow sensor that is not reading airflow accurately, an EGR valve is not closing and is leaking exhaust into the intake manifold, an EGR valve that is allowing too much flow (because the EGR differential pressure sensor that monitors EGR flow is faulty and is under-reporting EGR flow).
If the problem is not enough fuel, the underling cause may be a weak fuel pump, restricted fuel filter, leaky fuel pressure regulator or dirty fuel injectors.

Mar 24, 2011 | Ford Escort Cars & Trucks

1 Answer

Generic code PO171 system 2 lean bank 1 generic


This can be caused by a faulty mass air flow sensor

Jul 06, 2010 | 1999 Ford Taurus

3 Answers

2003 Ford Ranger 4x4 extended cab- diagnostics checked and got these codes- P0171, P0174, P0300, P0316. Can you tell me what they mean?


P0171------ system too lean bank#1
Po174------ system too lean bank#2
For these 2 codes, try cleaning the maf sensor (mass air flow), that is mounted in the big black hose that goes from the air filter housing to the throttle plate, if it is dirty, that will cause those 02 sensors to send a signal to the computor to lean the air fuel mixture. If cleaning it doesn't work, the sensors will probably need changing.
P0300---- Random/multiple cylinder misfire
P0316---- Cylinder misfire at start up---- first 100 revolutions.
On those 2 codes, you have to do some testing to find out why there is a misfire.
Possible causes:
dirty/malfunctioning injectors
weak coil pack
fowling spark plugs/wires
Low fuel pressure

May 11, 2010 | 2003 Ford Ranger Regular Cab

1 Answer

I have a 2001 Ford Taurus that shows PO302 and PO171. Can anyboby help me with these codes as my car is running very badly? It is hesitating and running very rough, I would like to solve this problem very...


P0302: Cylinder #2 misfire.
P0171: System too lean, (bank 1)
The first may be a bad spark plug or the wiring to it. If it has been some time since the engine has had a tuneup, change all spark plugs and plug wiring. Check the air cleaner and replace if dirty. If it runs much better, recheck the codes again. If the car has 100k miles or over, it wouldn't hurt to replace the O2 sensors as they do wear out (even though the codes don't show that at this time). Replace the fuel filter as well. Running some injector cleaner through in the fuel will help too. If still having problems, check the system fuel pressure as the pump may be on the verge of failing. Again, the codes don't show this as a problem yet. Good luck.

Apr 12, 2010 | 2001 Ford Taurus

2 Answers

Why is my 1997 expedition showing a misfire on number 2 cylinder OBD code PO302. Also I am getting code readings PO174 andPO171 system to lean on Bank 1and 2


PO302 is being a misfire, could mean the plug is bad or the coil is bad for that cylinder. Which can give you the misfire reading and the system to lean codes. Check the #2 coil for firing.

Jan 28, 2010 | 1997 Ford Expedition

1 Answer

Lack of fuel when accelerating


This might help. It looks like you O2 sencor had gone bad or the signal has and causing multiple mis fire. according to your codes. 
PO171 System too Lean (Bank 1

PO174 System too Lean (Bank 2)

PO300 Random/Multiple Cylinder Misfire Detected

Causes of PO300
Fuel injectors, related wiring, sensors and computer issues
Running out of gas, or poor fuel quality
Evaporative emissions system (EVAP) concerns: fuel vapors leaking into engine
Incorrect Fuel Pressure
EGR system concerns

I'ld start with chaning the O2 sensors first but sheck for bad wire connection. Hope this helps and good luck

Apr 08, 2009 | 2004 Ford F150

Not finding what you are looking for?
1990 Ford F350 Logo

878 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

61249 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Fordexpert

Level 3 Expert

5331 Answers

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

Answer questions

Manuals & User Guides

Loading...