Question about 2001 Ford Windstar

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System too lean Bank 1

Van is misfiring when climbing hill also when in idle in some cases motor cuts out just had spark plugs and wires changed

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This is fuel system problem, Either fuel pressure, or some bad injectors, or wire connections to them, or Fuel pressure regulator, or fuel pump relay, or fuel pump, or fuel filter. There may be Error codes that need to be read by a autoparts store, if they will.

Posted on Mar 28, 2015

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Posted on Jan 02, 2017

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Keeps throwing up trouble codes p1506,p1151,p0302,p0171


Definition of Diagnostic Trouble Code P1506 Audi: Closed Throttle Position Switch Does Not Open/Short to Ground BMW: Idle-Speed Control Valve Opening Solenoid Control Circuit Signal High Ford: Idle Air Control Overspeed Error (see P0507) Jaguar: Idle Air Control System RPM Lower Than Expected - B Bank Kia: IAC Valve Opening Coil Voltage High Lincoln: Idle Air Control Overspeed Error (see P0507) Mazda: Idle Air Control Overspeed Error Mercury: Idle Air Control Overspeed Error (see P0507) Porsche: Throttle Jacking Unit Lower Mechanical Stop, Signal Implausible Volkswagen: Closed Throttle Position Switch Does Not Open/Short to Ground Volvo: IAC Valve Opening Signal
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Definition of Diagnostic Trouble Code P1151 Audi: Bank1, Long Term Fuel Trim, Range 1 Leanness Lower Limit Exceeded BMW: Oxygen Sensor Heater Circuit Signal Intermittent (Bank 2 Sensor 1) Ford: Lack Of Heated Oxygen Sensor Bank 2 Sensor 1 Switches - Sensor Indicates Lean Jaguar: Lack of H02S-21 switch, sensor indicates lean Land Rover: Lambda control limit bank 2.Implausible signal/condition Lincoln: Lack Of Heated Oxygen Sensor Bank 2 Sensor 1 Switches - Sensor Indicates Lean Mazda: Lack Of Heated Oxygen Sensor Bank 2 Sensor 1 Switches - Sensor Indicates Lean Mercury: Lack Of Heated Oxygen Sensor Bank 2 Sensor 1 Switches - Sensor Indicates Lean Subaru: HO2S-12 Heater Circuit High Input Toyota: Coolant Path Clog Up for Coolant Heat Storage System Volkswagen: Bank1, Long Term Fuel Trim, Range 1 Leanness Lower Limit Exceeded
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Definition of Diagnostic Trouble Code P0302 Category: Powertrain Definition: Cylinder 2 Misfire DetectedNote: This definition of P0302 is applied to all manufacturers
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Definition of Diagnostic Trouble Code P0171 Category: Powertrain Definition: System Too Lean Bank 1Note: This definition of P0171 is applied to all manufacturers

Jun 17, 2015 | Cars & Trucks

1 Answer

2000 ranger 4.0 misfire and running lean bank 1 and 2


What config motor? I'm confused is it a 4 litre straight 6 or a V configeration. If straight 6 spray aerostart around nr 1 intake manifold to head if idle picks up you need a new intake gasket this is very common. is it missing at idle, under load (up hill) or both. does it have coil overs (coil on each plug or old leads set up?

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I have a 2000 Hyundai Sonata that runs rough when you start it up. I hooked a code reader to it and it said that system was lean on bank 1 and multi misfire and not reading 02 sensor on bank one. I have...


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Runs rough when idling, even worse in drive, and nearly cuts off in reverse. Loses power climbing a hill.Is not running hot. Oil and trans fluid look good. Sometimes "service engine light is on". Changed...


I would perform a compression test on all cylinders if you've already changed your plugs and wires. This willtell u if u have ay mechanical problems with the engine. Also even tho you've changed your spark plugs and wires did you check your injectors or coil packs to ensure they're good. A problem with either will also cause misfires.

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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

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P301 Code on 2001 Ford Taurus SOHC (not FFL) with 253K miles. Replaced plugs and wires with Bosch Platinum +4 plugs and Motorcraft wire set. P301 returned almost immediately. Engine performance extremely...


Coil pack should in the front top of motor, with engine running remove one spark plug wire at a time from coil pack ( careful not to get shock ) they should all have spark, if one don't replace coil pack.

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1 Answer

Codes I have any help


IF U HAN A CODE 171.THATIS BANK ONE FUEL TRIM LEAN.THE WINDSTAR HAD PROBLEMS W/THE VACUUM LINES.U NEED TO SPRAY THE INTAKE MANIFOLD & LINES W/CARB CLEANER IF THE IDLE CHANGER THEN U HAVE A VACUUM LEAK.IF U HAD A MAF PROBLEM U WOULD ALSO HAVE CODE 174 BANK 2 LEAN.

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1 Answer

2001 MPV Runs Rough at Idle and Low end Throttle


This could be a bad fuel injector. Lean implies low fuel to the cylinder which will cause a misfire.

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1 Answer

2001 MPV Runing Rough at Idle & low end Throttle


the lean condition is the big clue here it indicates a lack of fuel which is causing the mis-fire on #3. I would suspect a fuel injector is clogged or not getting a pulse from the PCM. ( pulse is the electronic signal)

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1999 Ford E250 van Rough running


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