Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

We have a 2012 chevy express 3500 6.6 duramax van with a…

Customer Question
We have a 2012 chevy express...

We have a 2012 chevy express 3500 6.6 duramax van with a crank no start. Scanned for codes found no codes. The vehicle was running and shut off. Will not restart. We have good reading for the crank  and cam sensor. any ideas?

Submitted: 3 years ago.Category: Chevy
Show More
Show Less
Ask Your Own Chevy Question
Answered in 3 days by:
7/6/2015
Chevy Mechanic: Pete, Auto Service Technician replied 3 years ago
Pete
Pete, Auto Service Technician
Category: Chevy
Satisfied Customers: 33,389
Experience: 14 years GM dealer Technician.
Verified
My name is ***** ***** I am a professional here at Just Answer. I noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.
I have seen in some cases where a completely restricted fuel filter can cause this here.If this has not been checked or replaced I would see if this is the cause.If this was already checked or replaced or is not the cause here let me know.
Thanks Pete
Ask Your Own Chevy Question
Chevy Mechanic: Pete, Auto Service Technician replied 3 years ago
Hi,
I am following up with you to see if you still needed help with your question you had asked.If my help didn't satisfy your question please let me know so we can continue.
Thanks Pete
Ask Your Own Chevy Question
Customer reply replied 3 years ago

Ok. We'll check that.

Customer reply replied 3 years ago

Ok, we've checked the filters. We don't have any rail pressure. How do you check the injector pump.

Chevy Mechanic: Pete, Auto Service Technician replied 3 years ago
Was anything done on the vehicle recently that may have caused this issue at all before the fault occurred?
Ask Your Own Chevy Question
Customer reply replied 3 years ago

No other than an oil change nothing previous

Chevy Mechanic: Pete, Auto Service Technician replied 3 years ago
Below is the procedure I have located for the high side fuel injection pump diagnosis,I hope this helps you to locate the fault and to see if the pump is faulty.
Circuit/System Description
The high pressure fuel pump is located at the front of the engine valley and is engine driven by the camshaft gear. Fuel is drawn by the fuel supply pump from the primary fuel tank and delivered through the diesel fuel conditioning module to the high pressure pump. The engine control module (ECM) controls the fuel rail pressure using two pulse width modulated fuel rail pressure regulators. Fuel pressure regulator 1 is located on the fuel injection pump and meters the amount of fuel that enters the high pressure side of the pump. From the high pressure pump, the fuel moves to the two fuel rails through a high pressure metal line. The fuel rails distributes high pressure fuel to all 8 fuel injectors. The ECM varies the pulse width modulated voltage to the fuel pressure regulator 2 to relieve excessive fuel pressure which returns to the fuel tank. When the ignition is OFF, fuel pressure regulator 2 opens to bleed off the pressure in the fuel rail.
The ECM commands fuel pressure regulator 2 to control fuel pressure at idle and commands fuel pressure regulator 1 to control fuel pressure when engine speeds are above 1700 RPM. Under certain conditions both regulators are used to control fuel pressure. The actual and desired fuel pressures should be within 690 kPa (100 psi) during all engine operating modes.
Diagnostic Aids
* Contaminated fuel or incorrect fuel may cause erratic fuel pressure.
* A low fuel condition may cause driveability concerns.
* Water or contaminated fuel may cause driveability concerns. Refer to Contaminants-in-Fuel Diagnosis
* When ambient temperatures are below 0°C (32°F), the fuel tank pickup screen may be iced over from water in the fuel tank.
* High fuel injector return flow may cause fuel pressure control concerns.
* The addition of fuel system enhancements, such as auxiliary fuel tanks or add on fuel filters may relate to driveability complaints.
Special Tools
* CH-48027 Digital Pressure Gauge
* CH-50375 Fuel Injector Return Line Adaptor
* CH-50377-A Fuel Injector Return Line Plug
Circuit/System Verification
Note:
* If you were not referred to this test from another diagnostic, do not perform this procedure.
* Only perform this test when the fuel temperature is warmer than 18°C (65°F).
Engine cranking, observe that the Actual Fuel Rail Pressure and the Desired Fuel Rail Pressure are within 690 kPa (100 psi).
Circuit/System Testing
1. Ignition OFF, verify there are no external leaks or damage to the fuel return and supply lines.
◊If a condition is found, refer to Fuel Leak Diagnosis
2. Install the CH-48027 to the fuel rail service port. Engine cranking or idling, verify that the CH-48027 displays between 1-6 in Hg vacuum.
◊If greater than the specified range, inspect for a restricted fuel filter, kinked, or restricted fuel supply lines. Refer to Fuel System Diagnosis
3. Install the CH-50375 with a gauge to a fuel injector return line.
4. Engine cranking or idling, verify the injector return line pressure is greater than 3 bar (43 psi).
◊If less then the specified range, refer to Fuel Return System Diagnosis
5. Remove the fuel pressure regulator 2 return hose and plug the hose to prevent fuel leakage.
6. Install a section of rubber fuel hose on the fuel pressure regulator 2 outlet and place the loose end of hose into a clean fuel container.
7. Perform the applicable test listed below:
Cranking Test - Engine No Start
1. Engine cranking for 15 seconds.
2. Observe the volume of fuel from fuel pressure regulator 2. The volume of fuel should be less than 10 ml (0.4 oz).
◊If greater than the specified value, replace the Q45B fuel pressure regulator 2.
Note:
* Perform Steps 7.3 - 7.4 on each injector.
* Complete Steps 7.3-7.4 on all the fuel injectors before performing any repairs.
3. Disconnect the electrical connector and the fuel return line from one of the fuel injectors. Install the CH-50377-A to the return line to prevent leakage.
4. Engine Cranking for 15 seconds, verify no fuel leaks from the fuel injector.
◊If any fuel leaks from the injector, replace the fuel injector.
5. Disconnect the harness connector at the fuel pressure regulator 2 and crank the engine for 15 second.
6. Verify a steady flow of fuel comes out of the fuel pressure regulator 2 outlet.
◊If no return volume, replace the G18 high pressure fuel pump.
Engine Running Test - Engine Starts
Note:
Measure only the amount of fuel that leaks after the engine has reached 1800 RPM.
1. Engine idling, increase engine speed to 1800 RPM for 15 seconds.
2. Observe the volume of fuel from fuel pressure regulator 2. The volume of fuel should be less than 10 ml (0.4 oz).
◊If greater than the specified value, replace the Q45B fuel pressure regulator 2.
8. Install the fuel pressure regulator 2 return line.
Note:
* This procedure must be performed at idle and at 1800 RPM.
* When commanding fuel rail pressure at idle the maximum achievable pressure will be approximately 120 MPa (17404 psi).
9. Command the fuel pressure incrementally through the entire fuel pressure range with a scan tool. The Actual Fuel Rail Pressure and the Desired Fuel Rail Pressure should be within 690 kPa (100 psi) for the entire fuel pressure range.
◊If the desired and actual fuel pressure at idle is within 690 kPa (100 psi) and was not within 690 kPa (100 psi) at 1800 RPM, replace the Q45A fuel pressure regulator 1.
◊If the desired and actual fuel pressure at idle was not within 690 kPa (100 psi) but was within 690 kPa (100 psi) at 1800 RPM, replace the Q45B fuel pressure regulator 2.
◊If the desired and actual fuel pressure was not within 690 kPa (100 psi) at idle and at 1800 RPM, replace the G18 high pressure fuel pump.
10. If all the components test normal, test the fuel injector return flow. Refer to Fuel Injector Diagnosis
Thanks Pete
Ask Your Own Chevy Question
Customer reply replied 3 years ago

Where is regulator 2 located

Chevy Mechanic: Pete, Auto Service Technician replied 3 years ago
https://www.dropbox.com/s/rrpofihqfa51kjw/fp-07-09.gif?dl=0
1 - Fuel Pressure Regulator 1
2 - Engine Coolant Temperature (ECT) Sensor
3 - Fuel Temperature Sensor 1
4 - Fuel Pressure Regulator 2
Ask Your Own Chevy Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a chevy mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Pete Your Own Question
Pete
Pete
Pete, Auto Service Technician
Category: Chevy
Satisfied Customers: 33,389
33,389 Satisfied Customers
Experience: 14 years GM dealer Technician.

Pete is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money.

Todd LRochester NY

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

GM Tech (Cam)

GM Tech (Cam)

Chevy Technician

15,756 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

Chevy Technician

9,642 satisfied customers

15 years GM master tech

Tim&#039;s Auto Repair

Tim's Auto Repair

mechanic

8,884 satisfied customers

Have owned a repair shop for 25 yrs.

Dave Nova

Dave Nova

Chevrolet Technician

7,092 satisfied customers

ASE Master Certification. GM World Class Certification

John

John

Master A.S.E Automotive technician

4,071 satisfied customers

A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician

Don - Mo Lurch

Don - Mo Lurch

Auto Mech / Electronics

2,953 satisfied customers

Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.

Ron Z.

Ron Z.

- Chevy Tech -

2,836 satisfied customers

18+yrs experience. State Inspector and Chevy Diagnostics

< Previous | Next >

Related Chevy Questions
We have a 2004 3500 4x4 with 2 fuel tanks factory. Truck
We have a 2004 3500 4x4 with 2 fuel tanks factory. Truck starts fine and runs when cold. Drive it to first destination and shut off and get back in it 15 - 30 minutes later and will not start. Let sit… read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,756 satisfied customers
Start but shut off in 1 to 2 seconds. New: injectors,coils,
start but shut off in 1 to 2 seconds. New : injectors,coils, wires, New senors :cam, crank, map, mass air, oil press switch, cooling temp switch, throttle body & sensor, accelerator position sensor, c… read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
On a road trip, in my 2012 duramax diesel. message about
on a road trip, in my 2012 duramax diesel. message about exhaust came on, emissions issue. truck message read 100 miles to shutdown of power, then went to 65mph, then down to almost nothing. friday ni… read more
BOBBYSS
BOBBYSS
TECHNICIAN/ADVISOR
Associate Degree
8,343 satisfied customers
Brown JA: Thanks. Can you give me any more details
I have a 2001Chevy 3500 express van. I have put on a new alternator. Van died in two blocks. Chevy house said I needed new ECM. Installed, programmed but van will not start. Engine light is on but no codes are showing. … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
GM Express 3500: I have a 2008 Chevy Express 3500 6.6 Duramax
I have a 2008 Chevy Express 3500 6.6 Duramax (ambulance package). I just installed a new engine (from chevy), and I cannot get it to start. I hooked up my scanner, and I'm getting a p0335 crank positi… read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,756 satisfied customers
chevy 3500 express: 2007 chevy 3500 express van 6.6 duramax
2007 chevy 3500 express van 6.6 duramax OBDll says P0001, fuel volume reg.// control cicut/open. please dont charge my acount!!! yuall had your chance to help me and you failed. I have not been contac… read more
Expert
Expert
GMC 2500 sierra: I have a 6.6 duramax ran fine, shut it off,
I have a 6.6 duramax ran fine, shut it off, 5 days later it wont start. cranks for 4-5 seconds then stops cranking. shut key off and it cranks 4-5 seconds and stops. ran a diognostic it read crank sen… read more
Chris (aka - Moose)
Chris (aka - Moose)
Vocational, Technical or Trade Scho
108 satisfied customers
Chevy Express Diesel: I have a 2002 chevy express diesel 6.5
I have a 2002 chevy express diesel 6.5 that vapor locks as the engine becomes hot, not over heating, operating temperature,what is the solution to this problem?… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
Chevrolet: 2004 chevy 2500 hd 6.6 duramax, had cam sensor circiut
2004 chevy 2500 hd 6.6 duramax, had cam sensor circiut issues repaired mag ring for crank sensor still showed cam sensor circiut, replaced both cam and crank sensor tested wires repaired ground to sen… read more
C. Walker, Jr.
C. Walker, Jr.
633 satisfied customers
Chevrolet Silverado 2500 HD: 2003 chevy silverado hd 2500 6.6
2003 chevy silverado hd 2500 6.6 duramax shut off by itself and won't restart. it has cam sensor signal crank sensor signal 10400psi fuel pressure when cranking. replaced fuel pressure regulator. chec… read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,756 satisfied customers
2000 chevy: check engine light..following codes..van..wont turn
hello, on a 2000 chevy express G1500, 5.7 engine, the check engine light is on with the following codes: p1345 and p0108. the van just shut off and won't turn on. What could be the problem?… read more
Stephen D
Stephen D
607 satisfied customers
A 2003 Express van 3500 with 360 engine used..towing..eng..horsepower
I have a 2003 Express van 3500 with 360 engine used for towing. Looking to buy new similar van. Does the 2011, 360 eng have more horsepower? Any changes for 2012?… read more
Dodge expert
Dodge expert
ASE MASTER TECH, REPAIR FACILITY OWNER
High School or GED
3,636 satisfied customers
2004 Chevy Express 3500: passenger..van..it to an Advance Auto Parts
Have a 2004 Chevy Express 3500, 15 passenger van. The stabilitrak light has been illuminating on the dash recently very soon after beginning to start and drive the van. Took it to an "Advance Auto Par… read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,756 satisfied customers
Chevy: LS..V8 SFI 350 CID Vin# XXXXX located..programmed
I have a Chevy, 2002 3500 Express Van LS 5.7L V8 SFI 350 CID Vin# XXXXX located in Liberia. The computer module has been changed out and programmed by O'Reilleys and sent to Liberia. The problem is th… read more
Tim&#039;s Auto Repair
Tim's Auto Repair
mechanic
High School or GED
8,884 satisfied customers
2001 chevy: 5.7 vortec shutting off..engine code..starts back..se
2001 chevy 3500 express van 5.7 vortec shutting off coming to a stop or after about 3 seconds ildleing with a po101 engine code clear code it starts back runs 3 sec shutsdown again… read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,756 satisfied customers
99 CHEVY EXPRESS 3500: WITH a 5.7..FEW SECONDS..SHUTS..SCANNED..theft
WE HAVE A 99 CHEVY EXPRESS 3500 CARGO VAN WITH A 5.7. THE PROBLEM WE ARE HAVING IS THAT IT STARTS AND AFTER A FEW SECONDS IT SHUTS OFF. WE SCANNED THE SYSTEM AND WE GET CODES P1106 & V1192 (SECURITY I… read more
Mazda Ed
Mazda Ed
Lead Technician
High School or GED
1,963 satisfied customers
1999 chevy express 3500: conversion van..two seconds then dies
1999 chevy express 3500 conversion van. starts and runs for two seconds then dies. i thought it was a pass lock problem. head locksmith check for coded key. said it wasn't the security kicking in. wha… read more
Tim&#039;s Auto Repair
Tim's Auto Repair
mechanic
High School or GED
8,884 satisfied customers
2006 Chevy: 6.6l duramax diesel Engine starts and stalls..turn key
2006 Chevy Express with 6.6l duramax diesel Engine starts and stalls within 5 seconds turn key off, restart, does the same thing again runs smooth for those 5 seconds and stalls… read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,756 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x