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 OnlineHelp Your Own Question

OnlineHelp
OnlineHelp, Mechanic
Category: Car
Satisfied Customers: 3423
Experience:  Mechanic
Type Your Car Question Here...
OnlineHelp is online now
A new question is answered every 9 seconds

coils..plug cables, and Im blowing raw fuel out the exhaust..module

Resolved Question:

I''ve replaced coils, plugs, plug cables, and I''m blowing raw fuel out the exhaust.   All the plugs are getting carbon on them, except #6, which is clean and has fuel on it when I pull it out.    Ignition module?, vaccuum problem?
Submitted: 6 years ago.
Category: Car
Expert:  OnlineHelp replied 6 years ago.
Have you checked for spark? You will want to check for spark as this will rule out the ingntion module and other ignition problem (tester is only $6). This problem sounds more like a fuel regulator problem or a faulty injector. Something is dumping too much fuel inside. You can do a fuel pressure test to see how much fuel is getting into the rails. Then you should do a timing check, it could be that the amount of fuel is right however your timing is off and it's causing your fuel to go out unburned.
OnlineHelp, Mechanic
Category: Car
Satisfied Customers: 3423
Experience: Mechanic
OnlineHelp and 6 other Car Specialists are ready to help you
Customer: replied 6 years ago.
Reply to Adin3's Post: I've checked the spark and it's good for the #6 plug. What's odd is that when I pull all the plugs back out to analize them, 1 through 5 are blackend with carbon and 6 is clean and smells like fuel, as if it's not firing, but there is arc of the plug wire, and the plug is checked good.   Stuck open injector cause this?
Expert:  OnlineHelp replied 6 years ago.

A faulty injector will cause this, it can spray too much fuel into the engine cause it to run rich. You will also want to check your timing and compression.

Fouling of the entire set might result from an incorrect heat range spark plug or an over-rich air/fuel mixture caused by a clogged air cleaner filter element, a sticking heat riser valve, or a faulty choke. Fuel injectors that malfunction can also lead to this condition.

Other causes include weak ignition system voltage or an inoperative pre-heating system (carburetor intake air) or poor cylinder compression.

OnlineHelp, Mechanic
Category: Car
Satisfied Customers: 3423
Experience: Mechanic
OnlineHelp and 6 other Car Specialists are ready to help you
Customer: replied 6 years ago.
Plug heat range is good, spark is good, don't know that there is a choke in this system, and can't find any reference to a heat riser valve.

compression is good. Is there any way to test test the injector outside the vehicle?
Expert:  OnlineHelp replied 6 years ago.
Yes, you can pull them and take them to a machine shop they can test the output on them. If they are clogged they can clean them balance them and blueprint them. Also check your timing.
OnlineHelp, Mechanic
Category: Car
Satisfied Customers: 3423
Experience: Mechanic
OnlineHelp and 6 other Car Specialists are ready to help you
Customer: replied 6 years ago.
How can I adjust the timing? With the other cars I could adjust the distributor, but this just has the coils on a ingnition pack, and I don't see any adjustment options on the throttlebody?
Customer: replied 6 years ago.
Posibly a short in the injector wire assembly?
Customer: replied 6 years ago.
Also the timing tab is missing, so there is no way to check the marker with a light. I can't seem to find a replacement tab even at the dealer, or have a diagram of where it would attach if I found one.
Expert:  OnlineHelp replied 6 years ago.

That is what i was trying to say about the injector. The injectors however could have gone wrong in two different places. The injector or injectors or the computer.

You can test the wiring and the computer with a noid light, or a test light.
Hook up one of those too the injector connector, and crank the engine, the light should blink.
You could do one of two things with the injectors. The first and best would be pressurize the rail, then fire them by using a battery positive source, and a ground to the other terminal. (these are the terminals on the injector) Then check to see if the F/P pressure drops.
You could just also check the resistance of the injector, or see if you can get to open close off the car by powering it.
Sounds like there are injectors stuck open which could be due to a bad ECU/PCM.

OnlineHelp, Mechanic
Category: Car
Satisfied Customers: 3423
Experience: Mechanic
OnlineHelp and 6 other Car Specialists are ready to help you
Customer: replied 6 years ago.
If I disconnected the injector wire from #6, the clean wet plug, and start the engine, and the fuel is still coming out raw from the exhaust, does that almost ensure that #6 injector is stuck open?
Expert:  OnlineHelp replied 6 years ago.

Well it could be stock open manually and that would test if it's stuck like that. If you disconnect it and raw fuel is still coming out to it then yes it's open. However you should also check the current to it to make sure that the injector is coming on and off rather then just have power at all times. Also if you do the disconnect check if you get fuel on the spark plug again.

OnlineHelp, Mechanic
Category: Car
Satisfied Customers: 3423
Experience: Mechanic
OnlineHelp and 6 other Car 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 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
  • Excellent reply, and also very quick. Really sounds like the Expert knows what he is talking about. I will be back to use your service when I need more help with my RV. Dutch USA
 
 
 

Meet The Experts:

 
 
 
  • 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