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 Davo Your Own Question

Davo
Davo, Master technician
Category: Car
Satisfied Customers: 3253
Experience:  ASE Master Technician/Advanced Automotive Diagnostic Technician
Type Your Car Question Here...
Davo is online now
A new question is answered every 9 seconds

GM: vehicles are plagued with flickering headlight problems..narrowed

Customer Question

It appears that for some years now , many GM vehicles are plagued with flickering headlight problems.Has this issue been narrowed to a few solutions?
Submitted: 5 years ago.
Category: Car
Expert:  Davo replied 5 years ago.
The reason they flicker is because the voltage regulator is controlled by the pcm in my opinion.To the best of my knowledge GM has not found a cure for it yet.They have tried some patches but none have been successful.Again that is my opinion.They need to adress the pcm software to "Soften" the charging system variations.I had a customer that got a fine for flicking his headlights to warn of a speed trap when he was not doing so do to the flickering.I wrote a staement for him.To this day I have no idea if it helped him in traffic court.Some cars on the road today look like you are flashing the lights when you are not because of the beam desin in the new composite headlamps.The beam is directed quite well for the driver but onlookers will see it as flashing the lights.
Customer: replied 5 years ago.
I'm sorry.I had just posted a motorcycle question and thought that was what I was getting an answer to. I had posted this particular question about the headlight flickering some time back and had really not given it any further thought after doing some research on the subject.
Expert:  Davo replied 5 years ago.
The site shows both questions being asked today.If you don't get an answer for your Harley question let me know.I will contact a few people for you.My wife and I both have Sportsters.Have a good day and keep the shiny side up.
Customer: replied 5 years ago.
I think the reason it showed both answers today is because i hadn't completed the sign-up(which I just did a few minutes ago) when I asked the first question about the GM headlight flickering.Sorry for any confusion. I've got a really sharp 01' road king classic that I'm still making payments on. It's my first ever H-D and I reallly love it! But after doing a web search on the early magnetti marelli efi (which mine has)I'm concerned to the point that I'm actually considering trading up to a 02' or newer to get the "better" delphi efi.Anyhow' thanks and sorry for any confusion.
Expert:  Davo replied 5 years ago.
You could always go aftermarket you know.When you did the big bore kit was the bike remapped?
Customer: replied 5 years ago.
I purchased the bike with the kit already installed and got the receipt where the dealer had installed it and it shows to have been remapped.It really doesn't run "bad" but my main concern is that it appears to run somewhat "rich" (black soot inside muflers)and the excess combustion byproducts as a result are likely to accelerate oil contamination and engine wear.
Expert:  Davo replied 5 years ago.
Harley pipes are supposed to be black inside.If they are not you are running too lean and will cause engine damage.The oil will get dirty looking as well it is the nature of an air cooled beast.
Customer: replied 5 years ago.
Well then maybe it's not all that bad after all.But i would like to have a lower(and more consistent) idle to "accentuate" that Harley "lope".It more often than not idles higher when outside temps are warmer than when they are cooler.Hey,thanks for your input.Just in case you care to take a look,here's some pics of my hog: http://www.flickr.com/photos/26113392@N06/
Expert:  Davo replied 5 years ago.
I think you need a remap or an aftermarket tuner for the EFI.With the aftermarket models you can download into a laptop go to the bike and download the map or move your desk top closer so you can.dealers charge big bucks for a remap and want to charge you dyno time to tweek it.I see your mileage is under 16K.Dude you have at least a bare minimum of 100K to go before any serious work needs done and it will mont likely be more than that.Sporties go well over that mark if talen care of properly.You won't see that in a Jap bike.Harleys don't leak oil anymore either from what I have seen.The older ones still do but not the newer ones.If you still want a newer King stay away from the six speeds for now.They have some noise/trans problems HD still needs to work out,Nice bike by the ay I would love to have it in the stable.Iron horse stable that is.
Customer: replied 5 years ago.
Thanks for the heads up on the six speeds-good to know.Even if i did trade up, I'm only thinking something in the 02' to 04' range(not yet independently wealthy:)if you know what I mean.Thanks for the info on the engine life expectancy too-I really had no idea as this is my first endeavor with H-D.I keep thinking I'd like an e-glide for more cool weather comfort as the wife and i really enjoyed riding up through late fall 07 and early spring 08(though we froze our a***s off a few times lol)

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 would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
< Last | Next >
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
  • used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future. David L. Richmond, TX
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil Marysville, CA
  • Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible. Charles Walnut Creek, CA
  • As a single woman, I really appreciate an excellent and affordable opinion.
    Thank you Geordie, I will not hesitate to contact justanswer in the future!
    Sue Charleston, WV
  • Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff. Jim Castleberry, FL
  • The nearest Volvo dealer is 160 miles away. Best $15 bucks I have spent in a long time! Paul M Corpus Christi, TX
 
 
 

Meet The Experts:

 
 
 
  • Chris (aka-Moose)'s Avatar

    Chris (aka-Moose)

    Technician

    Satisfied Customers:

    846
    16 years of experience
< Last | Next >
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka-Moose)'s Avatar

    Chris (aka-Moose)

    Technician

    Satisfied Customers:

    846
    16 years of experience
  • http://ww2.justanswer.com/uploads/TE/TedG/2012-6-15_14759_avaLarge.64x64.jpg Ted G.'s Avatar

    Ted G.

    ASE Certified Technician

    Satisfied Customers:

    1596
    20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness
  • http://ww2.justanswer.com/uploads/joecamel90/2008-11-13_03615_head_shot.jpg George H.'s Avatar

    George H.

    ASE Certified Technician

    Satisfied Customers:

    1311
    ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist
  • http://ww2.justanswer.com/uploads/AM/amedee/2013-10-24_23656_Amedee1.64x64.jpg Amedee's Avatar

    Amedee

    ASE Master Tech

    Satisfied Customers:

    2367
    ASE Master Tech advanced level specialist
  • http://ww2.justanswer.com/uploads/SU/supermechanic/2013-8-23_03546_500.64x64.jpg Jerry's Avatar

    Jerry

    Master Mechanic

    Satisfied Customers:

    1906
    ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager
  • http://ww2.justanswer.com/uploads/CR/crzydrvr00/2013-11-3_12123_246347.64x64.jpg Richard's Avatar

    Richard

    ASE Certified Technician

    Satisfied Customers:

    942
    12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes
  • http://ww2.justanswer.com/uploads/ST/Steve7654/2012-6-5_215929_japic800x660.64x64.jpg Steve's Avatar

    Steve

    Auto Service Technician

    Satisfied Customers:

    1980
    25+ yrs experience as a professional working technician; ASE L1 master technician