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 lazydog76 Your Own Question

lazydog76
lazydog76, Chevy Technician
Category: Chevy
Satisfied Customers: 203
Experience:  10 years exp professional, ase master, gm tech
Type Your Chevy Question Here...
lazydog76 is online now
A new question is answered every 9 seconds

2004 chevy silverado 1500: 5.3l..it has a miss to it..rpms..jumping

Customer Question

I own a 2004 chevy silverado 1500 5.3l it has 94000 miles on it, so I decided to change the plugs and wires in it and now it has a miss to it more noticable a lower rpms and when it does miss it sounds like spark jumping. I doubled checked everything and even bought higher dollar wires. Was running good before I changed them. Not understanding what might of happened?
Submitted: 5 years ago.
Category: Chevy
Expert:  lazydog76 replied 5 years ago.
hi what kind of wires and spark plugs did you purchase
Customer: replied 5 years ago.
ac delco rapid fires platinum plugs    bwd select super mag wires
Expert:  lazydog76 replied 5 years ago.
did you gap the spark plugs
Customer: replied 5 years ago.
yes
Expert:  lazydog76 replied 5 years ago.

ok these spark plugs are non adjustable which means they are pregaped and do not need to be gaped due to the reason of damaging the spark plugs. this is a copy from ac delco for your truck. hope this will help. and always replace using ac delco parts.

 

"); return false"> SPARK PLUG,
Part Number: 41-985
Product Notes:
[Iridium-Spark Plug]; DO NOT DEVIATE FROM PRESET GAP .040 ; .040 GAP
Per Vehicle: 8; Years: 1999-2005

lazydog76, Chevy Technician
Category: Chevy
Satisfied Customers: 203
Experience: 10 years exp professional, ase master, gm tech
lazydog76 and 9 other Chevy Specialists are ready to help you
Customer: replied 5 years ago.
they were gapped at .060 and thats what they told me they were supposed to be at but what i dont understand is the ticking noise i here every time it starts to miss would u here that noise if the gap was to big and only seems to be coming from one side
Expert:  lazydog76 replied 5 years ago.

check the plugs for a crack on the ceramic portion of the plug. you can use a spray bottle with water in it and spray on the wires to see if you can locate the cylinder. also is the check engine light on?

 

but yes the ac delco rapid fires platinum plugs are gaped at 60 and should not be regaped.

Customer: replied 5 years ago.
they are trying to tell me it is one of my coils and if the plug was cracked wouldnt it be ticking constintly
Expert:  lazydog76 replied 5 years ago.
no it would not have to tick constantly, usually when wet or moisture, hot or under load. a coil usually does not have external spark. is the check engine light on, as it should be if you have a missfire like your describing.
Customer: replied 5 years ago.
no check engine light isnt on
Expert:  lazydog76 replied 5 years ago.
i would go back and double check the spark plugs and wires that you installed. i think your problem is in the spark plugs. but you need to double check the plugs.... if you would give me the vin number please so i can make sure what engine you have.
Customer: replied 5 years ago.
1gcek19t24e309478 (lm7)   was does the water do?
Expert:  lazydog76 replied 5 years ago.
water is a conductor of electricity so it will ground out on the engine and if it a bad wire or cracked plug it will cause it to spark, you do this in a spray bottle and spray a mist on the ignition wires and even the coils... what did you gap the plugs on and what is the part number of the ones that you removed. i will cross them.
Customer: replied 5 years ago.
thank you very much i will check the plugs
Expert:  lazydog76 replied 5 years ago.
if you keep having the problem i would replace the spark plugs using the same as was in it before you changed them or with the number i listed above. just a note if a plug is not sparking like it should the coil is still firing and the spark is going to go to the weakest spot or grounding location. and if the gap is not as listed above or on the label under the hood it will cause problems and missfire. so i am sure the plugs are causing your problem

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