Loping start

Hi and thanks for using 2CarPros.com.

If it takes several tries to get it to run, you may have an issue with fuel pressure drop off. Here is a link that explains how to check pressure, the regulator, and pressure drop off:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Here are the directions specific to your vehicle for testing pressure and performance:

STATIC PRESSURE TEST
1.Check for adequate fuel supply.
2.Turn key OFF
3.Install fuel pressure gauge to test port on fuel rail.
4.Install test lead to fuel pump lead of STO test connector.
5.Turn Key On Engine Off (KOEO).
6.Ground test lead to run fuel pump.
7.Check to determine if fuel pressure is within acceptable limits. Refer to SPECIFICATIONS.
a. If pressure is low but greater than 3 psi (indicates fuel pump is running but not enough pressure) check for:
Plugged fuel filter
Kinked fuel line
Low voltage to pump (should be within 0.5 volts of battery voltage at connector).
Disconnect the fuel return line and note if fuel is being returned during this low pressure condition. If fuel is being returned, replace the fuel pressure regulator. Reconnect the fuel return line.
b. If pressure is less than 3 psi (pump not running) check for:
Defective fuse link
Inertia switch open
Wiring at fuel pump/tank connector loose or open
Fuel pump ground connection at chassis loose or defective
Improper fuel pump relay operation
If fuel supply and return lines are OK, and electrical supply and ground are OK, and fuel pressure is still low, replace fuel pump.

DYNAMIC PRESSURE TEST
1. Disconnect and plug the vacuum line to the pressure regulator.
2. Start engine and run at idle. Check to determine if fuel pressure is within acceptable limits.
a. If pressure is low check for:
Plugged fuel filter
Restricted fuel line
Low voltage to pump (should be within 0.5 volts of battery voltage at connector).
3. Reconnect the vacuum line to the regulator.
If fuel supply and return lines are OK, and electrical supply and ground is OK, and fuel pressure is still low, replace fuel pump.

LEAKAGE TEST
1.Momentarily activate fuel pump by grounding test lead. Raise pressure to approximate operating pressure.
2.Remove ground from test lead and note pressure on gauge. Pressure should remain within 2 psi for 3 minutes after lead is ungrounded.
a. If pressure is not maintained check for leaking fuel
Lines
Connectors
Injectors
b. Disconnect fuel return line and plug engine side. Momentarily activate fuel pump by grounding test lead. Raise pressure to approximate operating pressure. If pressure holds replace regulator and retest. Reconnect the fuel return line.
If pressure is not maintained replace fuel pump.

Let me know if this helps or if you have other questions.

Take care,
Joe

You are very welcome. I just hope this is helpful. Let me know what you find or if you have other questions.

Have a good weekend.

Joe