fuel problem

[RedHeartbeat]

Time and humidity.

[1fastsilverado]

ts got 44-45psi fuel pressure still. people tell eme thats normal then some say 60-66psi is what it needs???? im not sure. one guy said it sounds like fuel presure regulator under upper intake. one guys says plugs one guy says bad gas. golly anyone got a clue what its suppose to be at psi wise?

[1fastsilverado]

i also checked cap and rotor and it was fine.

[1fastsilverado]

p1351 is code its throwing.

[foggy]

found this here code 1351.. what needs to be replaced? - Car Forums and Automotive Chat

Heres a starting point for P1351

Conditions for Running the DTC


The ignition control is enabled
The engine speed is less than 250 RPM

Conditions for Setting the DTC
The ignition control voltage is more than 4.9 volts.

Action Taken When the DTC Sets


The Control Module illuminates the Malfunction [COLOR=blue! important][COLOR=blue! important]Indicator [COLOR=blue! important]Lamp[/COLOR][/COLOR][/COLOR] (MIL) if a failure is detected during 2 consecutive key cycles.

The Control Module will set the DTC and records the operating conditions at the time the diagnostic fails. The [COLOR=blue! important][COLOR=blue! important]Control [COLOR=blue! important]Module[/COLOR][/COLOR][/COLOR] stores the failure information in the scan tools Freeze Frame and/or the Failure Records.

Conditions for Clearing the MIL/DTC


The Control Module turns OFF the MIL after 3 consecutive drive trips when the test has Run and Passed.

A history DTC will clear if no fault conditions have been detected for 40 warm-up cycles (coolant temperature has risen 22°C (40°F) from the start-up coolant temperature and the [COLOR=blue! important][COLOR=blue! important]engine [COLOR=blue! important]coolant[/COLOR][/COLOR][/COLOR] temperature is more than 70°C (158°F) during the same ignition cycle).

Use the scan tool Clear Information function.

Diagnostic Aids
Intermittent test - If the connections and the harness check OK, monitor a digital voltmeter connected between VCM terminal C3 pin 9 and C4 pin 18 while moving related connectors and [COLOR=blue! important][COLOR=blue! important]wiring [COLOR=blue! important]harness[/COLOR][/COLOR][/COLOR].

If the failure is induced, the voltage reading will change. This may help to isolate the location of the malfunction.

An intermittent may be caused by any of the following conditions:


A poor connection

Rubbed through wire insulation

A broken wire inside the insulation

Thoroughly check any circuitry that is suspected of causing the intermittent complaint.
Refer to Intermittents and Poor Connections Diagnosis. See: Diagnosis By Symptom

Test Description
The numbers below refer to the step numbers in the diagnostic table.


This step determines if the DTC is an intermittent.
This step checks if the IC signal from the VCM is available at the ignition control module.

[1fastsilverado]

i fixed it. the cradle that held the fuel pump bent and it caused some pressure in and some out and it wasnt getting enough pressure nor fuel causing all the sensors to go nuts. thank god for mechanic neighbors!