How JustAnswer Works:

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

Ask Gary Your Own Question

Gary
Gary, Chevy Technician
Category: Chevy
Satisfied Customers: 10847
Experience:  15 years GM master tech
19513769
Type Your Chevy Question Here...
Gary is online now
A new question is answered every 9 seconds

I have a 2000 chevy express van with Braun Wheelchair lift

Resolved Question:

I have a 2000 chevy express van with Braun Wheelchair lift & hand controls. I am having difficulty starting the van with key or remote start. The fuel pump runs, as it should, and I begin cranking and sometimes it fires right up and other times it will crank just fine but will not start. If I start this van up approx. every 4 hrs or less it's trouble free. If I let it sit overnight, it's is a crap shoot whether it will start overnight. Ghost problem? I did have total failure back in Feb.2013, when my mechanic replace some sensors, Crank and cam and new disrtributor. Replaced fuel filter recently air filter new. I do believe this to be electronic but where do go from here?
Submitted: 11 months ago.
Category: Chevy
Expert:  Gary replied 11 months ago.

Welcome! My name is XXXXX XXXXX I will do my best to assist you with this problem.Ask me about added features such as phone contact anytime if you wish !

im sorry your having this problem

if its started with the ignition key in the truck will it still act like this ?

when it will not start how do you get the van to start up

is this a 1/2 ton ?

what size engine is in the van ?

Customer: replied 11 months ago.
Ignition key seems to make no difference
To get it to start? Very sparratic. Usually, I attempt to start with remote button. But if that does not work I have gone inside van and tried key. It does seem to help if I turn key on and off numerous times and once it makes attempts to fire. I repeat the process. And if that does not work I let it sit a couple of hrs then try again. The mystery is when it decides to start it is instantaneous. Leaving it sit overnight without running it, will not start in morning. I can hear fuel pump running and it cranks just fine. Even put new battery. 1/2 ton yes.
4.3 v6 engine
Expert:  Gary replied 11 months ago.

ok Jim the most common problem causing exactly what your van is doing is the fuel system loosing its prime

this can be caused by a bad fuel pressure regulator on the injection unit under the black upper intake manifold to the most common the one way check valve built into the fuel pump is allowing fuel pressure to run back through the pump loosing the prime

which keying it on and off will sometimes build up enough pressure for it to run

your best bet is to have a fuel pressure gauge connected to the test port on the engine and key ON engine OFF see what the pressure is it should be 60 to 66 PSI and the needle should hold and NOT drop down

the odds are the pressure will drop down to 0 very fast which shows fuel pressure is your problem then the fuel pressure gauge should be connected to the fuel line from the fuel tank into the fuel filter and just connect that fuel line right into the gauge

key ON engine OFF test again if the PSI still drops the fuel pump is bad if the PSI holds within spec then the fuel bleed off is the regulator or the injection assembly

which replacing the injection assembly would fix this problem

and of course if the fuel PSI is holding but below 60 PSI key on engine off the fuel pump is bad

 

Customer: replied 11 months ago.
Thanks Gary, I originally said that was it but I had no idea where this check valve was. Can you give me a more specific name of the part? Part no. Maybe? And location on manifold? I would appreciate it? Drawing maybe? Realize this is a van and I have to to take the engine cover off inside the van. I have someone that can do it for me once I get it to run again?
Expert:  Gary replied 11 months ago.

the fuel pump is basic the fuel tank needs to be removed and the fuel tank module/fuel pump assembly needs to be changed

print this out or save it to your computer ASAP as the pictures time out quickly in here

 

 

# XXXXX is the regulator

 

 

 




 

 

 

  1. Remove the engine cover. Refer to Engine Cover Replacement.
  2. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement.
  3. Disconnect the PCV tube from the air cleaner outlet duct.
  4. Remove the air cleaner outlet duct from the throttle body. Refer to Air Cleaner Outlet Duct Replacement.
  5. Disconnect the accelerator control cable from the throttle shaft and the accelerator control cable bracket. Refer to Accelerator Controls Cable Replacement.
  6. Disconnect the cruise control cable, if equipped from the throttle shaft and the accelerator control cable bracket. Refer to Cruise Control Cable Replacement.



 

 

 

 

  1. Remove the PCV valve hose assembly from the intake manifold and the valve rocker arm cover.



 

 

 

 

  1. Disconnect the following electrical connectors:
    • The fuel meter body assembly connector (1)
    • The EVAP canister purge solenoid valve (2)
    • The Manifold Absolute Pressure (MAP) sensor (3)



 

 

 

 

  1. Disconnect the following electrical connectors:
    • The Throttle Position (TP) sensor (1)
    • The Idle Air Control (IAC) motor (2)
    • The Engine Coolant Temperature (ECT) gauge sensor (3)
    • The A/C high pressure switch (4), if equipped



 

 

 

 

  1. Remove the engine wiring harness bracket from the intake manifold stud.
  2. Move and secure the engine wiring harness out of the way.



 

 

 

 

  1. Disconnect the A/C vacuum hose from the intake manifold.
  2. Remove the power brake booster vacuum hose bracket and nut from the intake manifold stud.
  3. Disconnect the power brake booster vacuum hose from the intake manifold.



 

 

 

 

  1. Remove the accelerator control cable bracket from the throttle body and the intake manifold.
  2. Remove the EVAP canister purge solenoid. Refer to Evaporative Emission (EVAP) Canister Purge Solenoid Valve Replacement.
  3. Remove the fuel lines from the fuel meter body assembly. Refer to Fuel Hose/Pipes Replacement (Engine Compartment).
  4. Remove the distributor cap. Refer to Distributor Replacement.
  5. Remove the ignition control module. Refer to Ignition Coil and ICM Replacement.



 

 

 

 

  1. Remove the studs for the upper intake manifold.
  2. Remove the upper intake manifold.



 

 

 

 

  1. Remove the upper intake manifold gasket from the groove.
  2. Discard the gasket.



 

 

 

 

  1. Remove the seal from the fuel meter body assembly.
  2. Discard the seal.

 

Gary, Chevy Technician
Category: Chevy
Satisfied Customers: 10847
Experience: 15 years GM master tech
Gary and 12 other Chevy Specialists are ready to help you

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 L Rochester NY
< Last | Next >
  • 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 L Rochester 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!!!! Alex Los 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. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, 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. Esther Woodstock, 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. Robin Elkton, Maryland
 
 
 

Meet The Experts:

 
 
 
  • Tim's Auto Repair

    mechanic

    Satisfied Customers:

    7641
    Have owned a repair shop for 25 yrs.
< Last | Next >
  • http://ww2.justanswer.com/uploads/TI/tim37857/2011-10-28_23053_S6301814.64x64.JPG Tim's Auto Repair's Avatar

    Tim's Auto Repair

    mechanic

    Satisfied Customers:

    7641
    Have owned a repair shop for 25 yrs.
  • http://ww2.justanswer.com/uploads/DT/dt69nova/2012-6-15_234154_pic1.64x64.jpg Dave Nova's Avatar

    Dave Nova

    Chevrolet Technician

    Satisfied Customers:

    6870
    ASE Master Certification. GM World Class Certification
  • http://ww2.justanswer.com/uploads/ggrote1/2009-06-27_031011_me.jpg Gary's Avatar

    Gary

    Chevy Technician

    Satisfied Customers:

    5404
    15 years GM master tech
  • http://ww2.justanswer.com/uploads/testedtuff/2009-09-26_170108_pictures.jpg John's Avatar

    John

    Master A.S.E Automotive technician

    Satisfied Customers:

    4071
    A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician
  • http://ww2.justanswer.com/uploads/RO/rodcuda/2011-7-25_224114_Donhoff1.64x64.JPG Neal's Avatar

    Neal

    Chevy Mechanic

    Satisfied Customers:

    2306
    Shop Owner and Mechanic on multiple makes.
  • http://ww2.justanswer.com/uploads/goodwrench9124/2008-11-09_220838_dscf0007.jpg goodwrench9124's Avatar

    goodwrench9124

    ASE Certified Technician

    Satisfied Customers:

    2041
    Ase Master Certified, GM Master Certified Tech. Awarded GM Top performer, Hybrid certified
  • http://ww2.justanswer.com/uploads/DR/drivefast1971/2012-1-12_172422_0009051tQKh.64x64.jpg Ron Z.'s Avatar

    Ron Z.

    - Chevy Tech -

    Satisfied Customers:

    1912
    18+yrs experience. State Inspector and Chevy Diagnostics