Question about 1996 Nissan 300ZX

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Will not shift into park 300zx 1996.engine running lean on left side,vacuum leak or fuel injectors.

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Its a vacuum leak to the left side fuel pressure regulator. find the hose that goes to the balance tube and follow it all the way back to where it connects to the manifold pressure. if you find any cracked or bad hoses i would suggest replacing them. if not the fpr could have gone out.

as far as park is concerned it sounds like the park saftey switch by the brake pedal. there is another sensor on the transmission but its very unlikely to go out.

Posted on Jan 28, 2010

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2 Answers

What does code p1131 mean on a 2001 ford taurus


P1131 Ford
P1131 Ford - Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Lean Bank 1

Repair Importance Level: 3/3

Repair Difficulty Level: 2/3

http://engine-codes.com/p1131_ford.html

Forum Code

Possible causes

- Faulty Oxygen Sensor

- Vacuum leak affecting bank 1 only

- Fuel injector problem bank 1

- Check for cylinder misfire on bank 1

- Engine mechanical condition

Tech notes

Though the Oxygen (O2) sensor, the Engine Control Module (ECM) has detected a lean system, which means that there is either not enough fuel or and excessive amount of air in the system. Start by checking for vacuum leaks.

When is the code detected?

The Engine Control Module (ECM) detected bank 1 oxygen (O2) at its lean limit

Possible symptoms

- Engine Light ON (or Service Engine Soon Warning Light)

P1131 Ford Description

A Heated Exhaust Oxygen (HO2S) sensor indicating rich at the end of a test is trying to correct for an over-lean condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time.

Read more: http://engine-codes.com/p1131_ford.html#ixzz3izk89wMu

Aug 16, 2015 | Ford Cars & Trucks

3 Answers

2002 gmc envoy 4.2 liter 6 cyl code reads bank 1 too lean


too lean can be from leaking manifold, vacuum leak, injectors on that bank, low fuel pressure

Aug 02, 2015 | GMC Cars & Trucks

3 Answers

Just changed the PLASTIC INTAKE on 2002 Ford Explorer its now has service engine soon. Pulling codes P0171, P0174, P0203. Does anyone know what this could be?


Check your work for vacuum leaks,can't have any

Replace the front oxygen sensors, if they have 100,000
miles on them That is the 171&174 along with vacuum leaks
& worn out slow sensors

PO203 ---is a #3 injector issue

Listen to hear if it ticks-- like the others & compare
OHM readings to the others

Nov 30, 2012 | 2002 Ford Explorer

1 Answer

I have a 2000 Ford Expidition and I scanned my truck. I came up with the code p1151


P1151---- Lack of HO2S-21 Switch,
Sensor Indicates Lean

Left Side (drivers side) O2 Sensor (21)
Lean trying to correct for a Rich Condition

Possible Causes:

Bad Sensor
High Fuel Press
Leaking Injectors
Air Leaks,Vacuum Leaks
PCV Leaks
Egr Valve
Intake Vacuum Leaks
Exhaust Leaks Before Converter

Also the EVAP System is the last to run a monitor
& you could have leaks in that system

Check that the air filter cover is on as well as gas cap

Sep 27, 2011 | 2000 Ford Expedition

1 Answer

P1131


Fuel/air ratio is correcting rich for an overly lean condition.
Possible Causes:
Fuel System---Exessive fuel presser, Leaking fuel injector(s), Leaking pressure regulator, Low fuel pressure or Contaminated injector(s).
Induction System--Air leaks after the MAF, Vacuum leaks, Restricted air inlet, PVC system, Fuel purge system or Improperly seated dip stick.
EGR--Leaking gasket, Stuck open EGR valve or Leaking diaphragm.
Base Engine--Oil overfill, Cam timing, Cylinder compression, Exhaust leaksbefore or near the HO2Ss.
CHECK AIR FILTER, AIR FILTER HOUSING FOR BLOCKAGE.
VERIFY INTEGRITY OF THE PCV SYSTEM.
CHECK FOR VACUUM LEAKS.
HOPE THIS HELPS YOU ??

Jul 06, 2011 | 1996 Ford Escort 4 Door

1 Answer

1996 ford escort, p0171 code and replaced all vacuum lines,. bad injector maybe? one ticks louder than the others. i cant find anything wrong


Hello, Its possible the noisy injectory is a problem. The code p0171 is a lean code. This usually means there is a Vacuum leak allowing more air into the engine than fuel. You can take a spray bottle of water and mist the engine while it is running. When you come across the part that is allowing more air into the engine, there should be a RPM change. Fix the part you find.

Usually the p0171 Code is an average of all cylinders on 1 bank of the engine. You could easily have a clogged Injector making the fuel mix lean. There are some kits in which you attach a tank of cleaner to the fuelrail and run the engine on the cleaner until it stalls. You will need to ask an Autoparts store if the kit is available.

In any case, reset the trouble light after making a repair.

Mar 18, 2011 | 1996 Ford Escort 4 Door

2 Answers

Po174


A P0174 lean code for bank 2 is the cylinder bank on the LEFT (driver) side of the engine on Ford vehicles with a transverse-mounted V6 engine and front-wheel drive. This code is not set on four cylinder engines (no bank 2).
WHAT A LEAN CODE MEANS
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.

Dec 24, 2010 | Ford Explorer Cars & Trucks

8 Answers

1996 T100 Toyota, will not start when hot, will start when cold but the engine light is on. Code says LB running lean? Allready replaced converter and sensors.


First thing that needs to be checked is the abscence of spark when it will not start. Running lean could be a vacuum leak on the left side or perhaps a clogged injector. How does it run when it does start?

Nov 01, 2010 | 1996 Toyota T100

1 Answer

The car warms up and then starts sputtering and bucking


When your engine is running lean that means it's not getting enough fuel.So if it's one side (or bank) of the motor then possibly you have an injector problem on that side.You'll want to get a fuel pressure test to see if the fuel system pressure is up to specifications.Then get the injectors tested.These tests are simple and realitivly cheap.

Oct 04, 2009 | 1996 Toyota Camry

1 Answer

87 nissan starts then stalls


jdmbaker: There are a few areas I would suggest looking in.
First, I would be looking for a false air problem. This is a condition where you have un-metered air getting into the engine. A torn airflow meter boot, or large vacuum leak such as a split pcv hose.
Second, your injector pulse width is primarily dependent on the coolant temperature sensor. This component is located at the front of the motor just below the thermostat housing. The sensor gives the ECM resistance values based on the temperature of the coolant. If the sensor fails, usually, they have a tendency to create a lean condition. This shortens the pulse width of the injectors which essentially starves the engine for fuel. One way you can perform a quick test for a lean condition, is to pinch off the return hose for the fuel going to the tank. If you look at the fuel hoses, they run right next to each other. You have one which comes from the fuel filter. That is the feed line. Pinch the other hose. This will boost the fuel pressure causing more fuel to be sprayed out of the injectors.With the hose pinched, hit the throttle, if the engine will rev up, you persue the lean condition theory.
Third. Check for a weak spark. A severely worn cap and rotor or bad plug wires can cause a hesitation and stalling problem if they are bad enough.
Fourth. The air flow meter could be faulty. This is a very common symptom matching you description.
Odds are that one of these are the solution. Good luck and let me know how you do.

Jul 14, 2009 | 1987 Nissan 300ZX

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