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on cool motor, remove fuel line to throttle body, turn switch to accessory position fuel should flow freely. no flow check filter located on frame rail. or defective fuel pump. pressure should be(if checked with good guage)45-55 psi. if all checks out throttle body jet clogged with gunk or you have broken-damaged throttle body wires. all of this i have found on 2.8 liter engines.-------jawstech goodluck hope this helps.
you should have 60 -66 psi there is a updated fuel pump with a new connector to splice in i would buy a ac delco pump and make sure you check the fuel filter first and if it does end up being the pump its a good habit to but a new fuel filter with it.
fuel pump is out of this vehicle .There is a pump in tank when you replace make sure you take your vin number with you ,so you get the right pump and filter its not cheep Warning: Shop around get the best deal and warranty.This is a big job good luck
This truck requires 51-56 PSI fuel pressure before it will start.You may have gotten a bad fuel pump.
It will not start with low fuel pressure. Buy a bottle of quik start and spray a little bit into the throttle body (JUST A LITTLE BIT ) if it starts and stays running you have a bad fuel pump or a clogged filter. It is no reccommended to use quik start so only do this once or twice then repair the problem.
Air - not likely the problem ! mechanical cable controlled throttle body
Fuel- make sure there is gas in tank! fuel pressure test at the throttle body or rails, if no fuel check power to fuel pump: ignition power to breaker or fuse, relay , power to pump at 3 pin connector near tank/frame rail on drivers side, - if pump is runniig but insufficient pressure, check for mechanical restriction: plugged filter broken or pinched line, plugged pickup tube in tank. if good pressure to rail or body, check ecm : diagnostic codes, fused power, ecm tells injectors when to open, dependent upon several sensor parameter inputs.
Spark- ignition - coil-distributor-ignition module (or coil packs)- wires-plugs-ignition module (signals coil to discharge, mounted beneath distr cap) work backwards from plugs.
The Lines are simple if it's a 2.4 EFI the lines run on the driver side inner rail from the center top of fuel tank, and up the middle of the firewall to the injector rail or throttle body carburetor there is also one line that runs from the evap canister back to the tank and to the fuel system three lines total one is a return line the large line is the main fuel line and has the fuel filter mounted on it and is under the driver side door inside the frame rail.
Drive this thing until hot and when
you shut it off, open the hood and find the vacuum hose that goes to
the fuel pressure regulator. It will be on the drivers side of engine
on the fuel rail. It's a little round vacuum diaphragm with a hose to
it. Pull this hose off and see if gas leaks out the little nipple of
the regulator. I'll bet it's leaking and what is happening is that it's
flooding out the engine after it's off for an hour or more.
fairly easy to replace since they are on the outside of plenum. Just be
VERY careful as to look at the new one before removing the old one.
Check location of the retainer clip, if it is not on right the
regulator can pop out and you will have a major leak!!! Also be sure to
remove the old O-ring and screen from the rail, they tend to stay in
there when you pull the regulator off. You won't be able to get new one
in if old parts are left in the rail.