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Try a little starting fluid in the intake and see if it runs a few seconds. If it does, it could be low fuel pressure or an injector problem. Maybe they aren't pulsing.
You have voltage to the injectors; now check the ground circuit: Use a test light and clip the lead to the POSITIVE post of battery. Put the probe into the ground terminal on an injector connector, and have someone crank the car over. If the test light is blinking, the ground circuit is good. When it blinks, that is when the computer is grounding the circuit for injector pulse to occur.
Get a compression tester, remove all the spark plugs, unplug ignition module and injectors. Now screw in tester hose to cylinder #1, attach guage and crank engine for 3 seconds. Record reading on gauge and move to next cylinder. Repeat this on all cylinders. Compression should be around 90-100 psi and should not vary more than 20% between cylinders.
Disconnect the negative battery cable.
Before servicing any electrical component, the ignition key must be in the
OFF or LOCK position and all electrical loads must be OFF, unless instructed
otherwise in these procedures. If a tool or equipment could easily come in
contact with a live exposed electrical terminal, also disconnect the negative
battery cable. Failure to follow these precautions may cause personal injury
and/or damage to the vehicle or its components.
Remove the air cleaner outlet resonator mounting screw.
Disconnect the air cleaner outlet resonator clamp at the throttle body.
Remove the air cleaner outlet duct from air cleaner outlet resonator and air
Disconnect the crankcase vent hose clamp and the crankcase vent hose from
the top of the engine.
Remove the air cleaner outlet resonator.
Remove the fuel rail bracket.
Remove the fuel injector electrical connectors by pushing in the wire
connector clip and pulling the electrical connector away from the fuel injector.
Remove the fuel feed inlet pipe quick connect.
Remove the fuel return pipe from the fuel pressure regulator.
Remove the fuel rail attaching bolts.
Remove the fuel rail assembly from the cylinder head.
Remove the fuel injector retaining clip.
Remove the fuel injector.
Important Visually inspect the fuel injector to see if the upper O-ring was
also removed, if not, remove the O-ring from the fuel rail assembly
does it run 2 to 3 seconds? does the scurity light blinks? if yes leave the switch on after running 2-3 second wait till security light stops blinking then start if light still blinks you have wiring problem. if light just stay on you have spark and fuel check injactor pulse.always remember if you have good spark ,good fuel pressure and injector pulse car should start
Spray aerosol carb cleaner into the throttle body while an assistant tries to start the engine. If it runs for a few seconds then quits, you are not getting fuel into the engine. Check the fuses. You might have blown the fuse for the fuel injectors (possible if you removed any of the injector harnesses) or the fuel pump relay. Charlie
loosen the battery cable.... start the car with a boost.... after it is running... unhook the battery.... if it dies... replace the alternator... if it keeps running... replace the battery.... make sure this is done outside and everyone working on the car is wearing safety glasses
maybe you pinched a wire, damaged a sensor, check the maf, idle air control, disconnect the battery for a while maybe it will reset the computer. doing this erases engine light codes, or check the codes first before, you should led you to the problem.
WEll it is possible it could be the idle air control. one the most comon problems is the fuel pressure regulator. To check it find the fuel rail the fuel regulator will have one vacuum hose on it remove the hose and check to see if it is wet with fuel if not have some one trun the key on or start the car if it leaks fuel out the regulator is bad. This would explain why its hard to start when it sits because it floods out the motor