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 Tim West Your Own Question

Tim West
Tim West, ASE Certified Technician
Category: Chevy
Satisfied Customers: 4638
Experience:  ASE Certified Service manager of Firestone
Type Your Chevy Question Here...
Tim West is online now
A new question is answered every 9 seconds

I have a 2002 chevy s10 with a 4.3 L V6 that will not start.

Resolved Question:

I have a 2002 chevy s10 with a 4.3 L V6 that will not start. It acts like its out of time. It turns over, has spark and fuel, but it only coughs back through the carb. I replaced the crank sensor. Can you tell me what the problem is?
Submitted: 4 years ago.
Category: Chevy
Expert:  Tim West replied 4 years ago.
Thanks for visiting Just Answer,
Have you tested the fuel pressure? If the fuel pressure is low, you will still get fuel but the vehicle will not start. Do not over look this, it's a very common problem.
Try starting the vehicle while spraying carb cleaner in the throttle body. See if it likes the external fuel. If so, replace the fuel pump.
The fuel pump/ lack of fuel is known for making the vehicle backfire through the intake.
Please let me know.
Customer: replied 4 years ago.
Tried starting the vehicle while spraying carb cleaner in the throttle body, but the same thing happened. What else can I try?
Expert:  Tim West replied 4 years ago.
Thanks, XXXXX XXXXX checked for spark on all cylinders? Does spark jump 1/2" and is blue in color?
Try disconnecting the mass air flow sensor located on the air filter hose box and check for the vehicle to start.
Is there a check eninge light on?
Customer: replied 4 years ago.
It has good spark on all cylinders, disconnected the air flow sensor - no start, check engine light is on.
Expert:  Tim West replied 4 years ago.
Thanks, XXXXX XXXXX the vehicle didn't like the extra fuel and there is spark, I am thinking the spark is erratic. If possible scan the vehicle's codes using a scanner. If not available, Replace the plugs, distributor cap and rotor.
Customer: replied 4 years ago.
Is there no way to manually time it? How is the timing configuration set on the vehicle? Could there be any other sensors to check? I do not have a scanner to check the code.
Expert:  Tim West replied 4 years ago.
Well, the sensors that will cause a check engine light, Cam, Crank, Mass air flow, Coolant temp. If the cam or crank were bad you wouldn't have spark.
You can test the coolant temperature sensor resistance.graphic

And compare to the chart. If the coolant temp sensor the vehicle might be running too right. It really doesn't cause a no-start too often.graphic
Tim West, ASE Certified Technician
Category: Chevy
Satisfied Customers: 4638
Experience: ASE Certified Service manager of Firestone
Tim West and 9 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