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 Matt Your Own Question

Matt
Matt, Engineer
Category: UK Nissan
Satisfied Customers: 617
Experience:  BEng Hons, 20 years repairing my own cars and others, 8 yrs in formula 1 engine testing
12772297
Type Your UK Nissan Question Here...
Matt is online now
A new question is answered every 9 seconds

Flat spot..accelerating, Im told it could be the solenoid..carb

Customer Question

I have a flat spot problem when accelerating, I'm told it could be the solenoid on the carb body. Any ideas please.
Alan.
Submitted: 5 years ago.
Category: UK Nissan
Expert:  DR CAR replied 5 years ago.
Hello Alan

First of all you do not have a carb, you have a closed loop injection system which is quite technical and needs expert diagnosis to rectify your problem.

Please can you make sure the ignition system is tip top ie. good spark plugs leads distributor cap and rotor arm .

Has the fuel filter been changed to your knowledge?

Has a fuel pressure test been carried out ?

Thank you Peter
Customer: replied 5 years ago.

Hi Peter,

I used the carb term loosely I know that it is fuel injected. I have changed the fuel filter but have not yet checked the ignition side. I was a mechanic in the fifties and sixties when cars were not so complicated. The problem I have is when you are accelerating there is a flat spot which then goes, otherwise the engine runs quite well. I was told by someone that there is a solenoid on the 'carb' body which delivers more fuel when needed and that these sometimes stick. I have been doing some welding underneath and have used a rollover frame to do it and have rolled it both sides and wondered it perhaps I have moved some muck about in the 'carb'

Many thanks. Alan.

Expert:  DR CAR replied 5 years ago.
Hello Alan

Hey the good old days !

So are you saying this happened after you did the welding and the roll over?

Thank you Peter
Customer: replied 5 years ago.

Hi Peter,

Unfortunately we had not really used the car before I did all the work, because I managed to break my arm. It was only driven about a mile and half to the mot place by my daughter and the back, so we didn't give it a fair trial. It languished about until I felt able to carry out all the mot requirements, quite a lot!!. I bought it off ebay with gearbox trouble, which I changed and then broke my arm. It is for my wife as a runabout. At the moment I am struggling to get the radiator off my Fiat Ullyse and am nearly there except for the intercooler rad and the climate control rad,trying to separate them from the radiator.

Many thanks.

Alan.

Expert:  DR CAR replied 5 years ago.
Hello again Alan

Oh my what a predicament ,can we concentrate on the primary question for the moment please.

Lets go for a long drive and full tank and report back to me please ?

Thank you Peter


Customer: replied 5 years ago.

Hi Peter,

Will be doing quite some mileage this week, will give you another email then.

Many thanks,

Alan.

 

Expert:  DR CAR replied 5 years ago.
Hello Alan

Might be a good idea to pop an injection ststem cleaner in on a full tank.

Thank you Peter

Customer: replied 4 years ago.
Hi Peter,
Have not been doing anything to the carfor quite some time due to the weather we have been having. However I have now fixed the problem, I found the solution on the internet on the Micra forum. It was entitled "Throttle Body Re-Soldering" it involves removing the cover off the side of the throttle body and resoldering the three diodes that come from the connector on the side and then re-sealing the cover. I have done this and it has cured it completely.
Many thanks, Alan.
Expert:  DR CAR replied 4 years ago.
Hey Alan thats whay we lite to hear, I like good endings great .

Safe motoring peter

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:

 
 
 
  • 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
< Last | Next >
  • 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
  • He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here. Diane Dallas, TX
 
 
 

Meet The Experts:

 
 
 
  • Matt

    Engineer

    Satisfied Customers:

    615
    BEng Hons, 20 years repairing my own cars and others, 8 yrs in formula 1 engine testing
< Last | Next >
  • http://ww2.justanswer.com/uploads/35/350matt/2012-6-7_182356_matsavatr.64x64.jpg Matt's Avatar

    Matt

    Engineer

    Satisfied Customers:

    615
    BEng Hons, 20 years repairing my own cars and others, 8 yrs in formula 1 engine testing
  • http://ww2.justanswer.com/uploads/witt0018/2009-02-09_180738_trev2.jpg Trev's Avatar

    Trev

    UK Nissan Car Mechanic

    Satisfied Customers:

    113
    NVQ 3, Modern Apprenticeship, MOT Tester, 15+ years experience diagnostic technician
  • http://ww2.justanswer.com/uploads/GazzaR1964/2009-06-03_115816_meingarden.jpg Gary Robinson's Avatar

    Gary Robinson

    UK Nissan Car Mechanic

    Satisfied Customers:

    57
    25 years of working on Nissans, from Cherrys to Qashqais!
  • http://ww2.justanswer.com/uploads/TE/techmachine/0601821347169_717372168_8940977_39623330_o.64x64.jpg Ross's Avatar

    Ross

    Mechanic

    Satisfied Customers:

    30
    Automotive Technician
  • http://ww2.justanswer.com/uploads/IN/InfinitiExpert/2012-1-16_317_family004.64x64.jpg Ryan's Avatar

    Ryan

    UK Nissan Car Mechanic

    Satisfied Customers:

    19
    ASE Certified Master with L1
  • http://ww2.justanswer.com/uploads/MO/molurch/2012-6-6_214526_500.64x64.png Don 'Mo Lurch''s Avatar

    Don 'Mo Lurch'

    Nissan Line Mechanic

    Satisfied Customers:

    11
    Line Mechanic for over 20 years
  • http://ww2.justanswer.com/uploads/IN/indytech/2013-8-8_102717_SantoDomingo146598x6402.64x64.jpg Greg's Avatar

    Greg

    import technician

    Satisfied Customers:

    271
    17 years Shop Owner /Technician. 27 years experience,
 
 
 
Chat Now With A Nissan Mechanic
Matt
Matt
Engineer
617 Satisfied Customers
BEng Hons, 20 years repairing my own cars and others, 8 yrs in formula 1 engine testing