Most likely it is the fuel pressure regulator..also check for spark here's some info for you.. The first thing to do is check for spark.
Disconnect #1 ignition wire at the spark plug.
Install a spark tester into the end of the spark plug boot.
Have an assistant crank the engine over and check for spark at the tester.
Repeat this process at each spark plug.
If any cylinder does not show spark, proceed to secondary component tests.
If ALL secondary components show no spark, test components individually.
If all cylinders test O.K., inspect for fouled spark plugs and clean or replace as necessary.
If spark checks out good, then you could have a fuel delivery problem. I would recommend to start by checking fuel pressure. Fuel injected cars are very fuel pressure sensitive. Fuel pressure is very important and must be within specifications! But if the pressure is low, it does not mean the pump is bad. A plugged fuel filter, a pinched line, and low voltage at the pump can contribute to low fuel pressure. All three must be check before replacing the pump! You can get a fuel pressure gage at a local auto parts store for cheap.
Fuel pressure testing is frequently overlooked but it is one of the common causes of poor performance. The test procedure must include testing that will insure normal
fuel pressure under all operating conditions.
Key Factors
1. Fuel demands are low at idle.
2. Wide open throttle at high engine revs uses the most fuel.
3. Port injection fuel pressure must be reduced when manifold vacuum is high. Vacuum pulls fuel out of the injector causing it to deliver too much fuel if the pressure remains high. Manifold vacuum is used to open the pressure regulator at a lower pressure when vacuum is high.
SOURCE: throttle body injectors not fiering but there is fuel pressure
the injectors are fired thru the engine cotrol module but it gets its signal to fire from the pick-up located inside the distributor if you are loosing injector pulse only the ignition module is bad if you are also loosing spark when you loose injector pulse your pick up is causing the problem if you replace the pick-up i recomend you change the ignition module when doing so because they work together and you have to remove the distributor to change the pick-up
SOURCE: 1999 Chevy Suburban 5.7 V8 Starts
ok here we go, hook up a feul pressure guage that can be read from inside the car, and check fuel pressure while driving, if the pressure stays fairly constant then the best bet is to hook up a real time scanner with snapshot capabilities ( like snap on or bdm pro) and take it for a drive again, ti could be a sensor reading out of range but not enough to set a code
SOURCE: 1991 1500 4x4 5.7 liter
Yes, there is a Fuel Pump Relay. The Relay is located on the firewall just above the left-hand (even cyclinders) valve cover as viewed from the front of the car. There is also fuel pump test lead attached to the harness at the fuel pump relay. Attach a power wire from the battery to the lead and the fuel pump should come on. If fuel pump comes on, the relay could be bad. Also check the fuel filter located under the passenger side of the truck tucked into the frame rail.
SOURCE: my 1988 f 250 460,
the most common reason on these is the two relays that lay on the inside of the engine compartment on top of the fender well on the driverside, there will be two, one is a fuelpump relay and the other for the computer /fuel system also called an auto shut down relay, replace them and clean the terminals on the connectors this sounds like this is the problem as it will start when sprayed until fuel bruned out, replace these two relays and i bet it will solve the problem, those relays go bad and the connectors ternminals get corroded and dont make a good connection. good day
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