Question about 2004 Ford Explorer Sport Trac
Don't think it would be the fuel rail, as that is only a pipe to hold the gas and the injectors. So if you have low pressure, it is probably either the fuel pump or the fuel pressure regulator. Wouldn't cost much if anything to have the fuel pressure checked. I believe Autozone or O'reilly's will rent those fuel pressure gauges, with just a refundable deposit.
The pump is doing something since the engine is still running. If your pressure is too low (below the specs for your truck), a pressure regulator is cheaper than a pump, so you may have to try both, first the regulator.
But first, pull the vacuum line to the regulator off and run the engine for a minute. Watch the regulator: if gas starts coming out the vacuum fitting on the regulator, then it is definitely shot and you need a new pressure regulator.
If the regulator is not leaking, check the fuel pressure. If low probably the pump, but maybe the pressure regulator. Ask the guys at autozone (or where you get the gauge to check pressure) how to test the regulator as you are checking the pressure.
Posted on Mar 29, 2017
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Posted on Jan 02, 2017
If you hear air in the engine, there must be a leak somewhere.
Check all the vaccum hoses for bad ones or dissconnected ones. All it takes is a pin hole in these darn emission systems to screw up the whole system.
It could also be a leaking intake manifold gasket.
Posted on Jul 13, 2009
remember the switch only gets power for 1 second when u turn the key on, the common problem is the ignition starter switch comes apart, it is located at top of the steering column near the bottom, drop the column down (2 nuts) and inspect the switch for separation.
Posted on Jul 27, 2009
IF PLUG IS OILY BLACK.YOU HAVE WORN VALVE GUIDES OR WORN PISTON RINGS.IF PLUG IS CARBON BLACK YOU COULD HAVE WEAK IGNITION TO THAT CYLINDER.THAT MODEL TRUCK HAS DISTRIBUTOR AND ROTOR CAP REPLACE THEM BOTH.IF THAT DONT HELP DO A COMPRESSION TEST ON THAT CYLINDER.YOU COULD A MECHANICAL PROBLEMS ON THAT CYLINDER.
Posted on Aug 30, 2009
SOURCE: TOO LEAN CODES
yes very very common code for these motors i get them all the time. now the first thing i do is listen to the pcv valve for noise if it is rattling this is the problem and is the most common of all. another thing is the intakes leak from cracks in them but the only way to find it is with a smoke machine. now the one other thing i have seen before is debre like a leaf in the mass air flow sensor but you have replaced it so most likely no that.
do your self a favor and change the pcv valve it only cost under 5 dollars. if this is not it you will need to find the leak in and around the intake or a vacuum hose.
because you have two lean banks this mean if it is a leak then it has to be in common with both banks and that is the vacuum line system intake etc...
let mew know if you have any more question. good luck man
Posted on Oct 21, 2009
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