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Is the fuel pump operating? If the fuel pump is operating then change the fuel filter. If the fuel pump is not working, then check the relay. Hope this helped.
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Code P0446 refers to the EVAP system. Evaporative (Emission Control System Vent Control Circuit Malfunction).
There is a valve in this system that controls the flow of excess fuel vapour. The ECU, (the car's brain), is getting a bad signal from this valve. You'll need to get this sorted out soon as it will affect your fuel consumption and the emissions your vehicle produces.
The EVAP system keeps the parts in the fuel system as an airtight set up. This is to stop any fuel vapour escaping into the atmosphere by redirecting back through the engine.
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Crank over eliminates a dead battery, switch, starter, etc.
How do you know it gets fuel? It is clearly the air/fuel mixture and ignition system that is failing. If those work but it died or stalled it would be a fuel system issue, such as bad MAP sensor, etc.
Fuel injection or not? Fuel injector do get dirty, I use Gumouts Complete Fuel System Cleaner to clean the whole fuel pathway but it may be too late for that this time. Anyhow, they need cleaning and they still use spark plugs to light the gas and those will get corroded over time but can easily be brushed clean. I've never had to clean my fuel injectors, try YouTube for those instructions.
Did you let the fuel nearly run out, or run out completely?
When the fuel level is very low, the sediment is drawn into the fuel sock at the fuel pump inside the fuel tank, clogging it, then clogging the fuel filter, and possibly the injectors can be damaged.
You didn't put diesel fuel into it, and you did use the correct grade of fuel. Just asking?
You may consider installing a new fuel filter. Before installing it, fill it with fuel injector cleaner-to give the system a good cleaning. This may help to clean up some of the problem.
More information always helps. Mileage, recent repairs, how it has been performing prior to any problems, etc.
If it's not tied to the fuel system or the fuel just installed, check the catalytic converter and exhaust system.
It's P0171 & P0174 not Pc 171 & Pc174 ! The engine computer has detected a lean condition ! That mean's it's not getting enough fuel or has a vacuum leak , bad O2 sensor ! fuel pump getting weak . fuel pressure regulator weak !
P0171 - System to Lean (Bank 1)
The Adaptive Fuel Strategy continuously monitors fuel delivery hardware. The test fails when the adaptive fuel tables reach a rich calibrated limit. Refer to Section 1 , Powertrain Control Software, Fuel Trim for more information.
Air Measurement System
EVAP canister purge valve leaking (when canister is "clean").
Fuel supply line restricted.
Fuel rail pressure sensor (incorrect reading).
Air Induction System
Air leaks after the MAF.
Vacuum Leaks.
PCV system (leak, valve stuck open, etc.)
Improperly seated engine oil dipstick.
Exhaust System
Exhaust leaks before or near the HO2Ss (exhaust manifold gasket, mating gaskets, etc.).
EGR System
EGR valve tube/gasket leak
EVR solenoid vacuum leak
Secondary Air Injection
Damaged/malfunctioning secondary air injection system (mechanically stuck valve).
P0174 - System to Lean (Bank 2)
The Adaptive Fuel Strategy continuously monitors the fuel delivery hardware. The test fails when the adaptive fuel tables reach a rich calibrated limit. Refer to Section 1 , Powertrain Control Software, Fuel Trim for more information.
See Possible Causes for DTC P0171.
See Diagnostic Aides for DTC P0171
View Freeze Frame Data to determine operating conditions when DTC was set. Observe LONGFT1 and 2 PID(s). Refer to Section 2 , Adaptive Fuel DTCs Diagnostic Techniques for more information.
engines need 3 things to start (petrol engine)
fuel, air and a spark,
as you have been working on your fuel system it is best to suspect this system first,
on engine turn over see if you can smell fuel at the exhaust.
if you smell fuel the fuel regulation mybe too high and the engine is flooding.
if you do not smell fuel, remove fuel line from engine and ensure fuel is getting to the engine,
(be careful not to let fuel spill this generates a fire risk)..
once fuel is getting to the engine, check your ignition system to ensure you have a good spark to ignite the fuel.
finally check your air filter is not blocked and that you have air getting to the engine.
check all of the fuel system related fuses and make sure none of them are blown. also check all fuel system related relays and make sure they are working properly. if that wasnt the problem could be with the fuel pump or the anti theft system. if its the fuel pump make sure it is getting power and a signal. if its getting power and a signal the fuel pump may need replaced.
Dear Ron, you have replaced fuel pump and fuel filter. You have checked the fuel pump relay. Still no fuel in rail. Try bypassing fuel relay with jumper from batt to fuel pump. If o/k then check computer for ground to relay. This system uses a relay that is operated by the computer that supplies a ground for the relay to operate. The wire color is green,16 gage. If the ground is not available then "no fuel" Check this with a test light. Key on and crank apply test light to ground wire and other end of light to ground. You should hear relay click and get fuel. If this checks out you will need to replace computer or get creative with rewiring the relay so it works without computer input. Good luck Moe
The fuel system has a bleeder located on the engine, located near the passenger side front of the engine. Open the bleeder, turn the engine over until you can see fuel come out on the ground near the front of the engine. Close the bleeder, attempt to restart the engine. It may take a couple of tries, but it should start after five or six attempts. Do not run the starter for more than twenty seconds per attempt, with at least one minute between attempts.
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