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 Mike Your Own Question

Mike
Mike, UK Car Mechanic
Category: UK Car
Satisfied Customers: 38739
Experience:  Hi, I am a Car/ vehicle technician of 34 years. 29of -running my own repair/diagnostic business.
9261905
Type Your UK Car Question Here...
Mike is online now
A new question is answered every 9 seconds

Mazda RX-7: Last week I tried to start it and it had no power.

Resolved Question:

Last week I tried to start it and it had no power. I tried to jump it and the starter would just click, I took the battery and had it checked and it was good. I put it back in it and it had power until I tried to start it and then it went dead. it sat for a few days and I tried to start it and it started, I let it run for a while and turned it off and then started it again. Today I started it and drove it to the gas station and when I tried to start it had no power. I had it towed home and tried to jump it and the starter would click and the tack would jump. I checked the battery terminals at the starter and battery. What do I check next?
Submitted: 1 year ago.
Category: UK Car
Expert:  Mike replied 1 year ago.
Hello and Welcome back to justanswer..

My name is XXXXX XXXXX I'm happy to help you with this issue.

As to what you need to check... at this stage as you have had the battery tested - we will assume it is indeed good and ok...

So - first - ensure the battery connections are good / good condition and tight. check where the actual cables go into the connector fitting are good - If its not starting at the moment... have someone hold the key in the start position.... and then at the same time - you grip the cables just before the connectors on the battery and give them a good tug / wiggle... You cant see inside of course but sometimes you get a bad connection inside the connector ( try the two / both in the same way ).... If the engine then starts to turn as you do that - you know you have a bad connector / cable there / cable joint.

If thats all ok - then follow the cables down from the battery - use the black / ground one first - Follow it to where it connects to the body - check its connection -and check it the same way as above ... Then - check the cable that connects between the body and the engine / trans... ion the same way as above. This is the ground / earth circuit tested.

If you dont find the problem - do the same with the red Pos cable - follow it to where it connects to the rear of the alternator - check that connection is good...

Check then that the connector at the back of the starter motor is good and tight -

If thats all ok - then remove the small connector from there starter motor rear.. this is your "trigger" cable - when you turn the key to the "start" position - that cable should show battery voltage on a test meter - of at least 12v... Test that.. If thats ok - replace the connector - check its tight - then retry the starting. If its now ok, you had a bad connection there - which is quite common. If its still not starting - and all the other checks as above are all ok - then the starter motor is suspect and needs to be removed for further test / investigation - and then go from there.

IF you don't get a 12v feed / reading when tested as above, then you need to check the ignition circuit .

Let me know if you need anything more on this at all -

Meantime -- Please click on the OK rating to Excellent ratings service for me now, Thank you for that... and you can get back to me anytime if you need / wish..

Best Rgds, MIKE.


Please note, you are rating the content of my "answer" - my help to you - not the "system" which can experience delays etc which are not under my personal control -or delays caused by "time -off" which we all have on occasion - Thank you.

Mike, UK Car Mechanic
Category: UK Car
Satisfied Customers: 38739
Experience: Hi, I am a Car/ vehicle technician of 34 years. 29of -running my own repair/diagnostic business.
Mike and other UK 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:

 
 
 
  • 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:

 
 
 
  • Marty

    European Car Expert

    Satisfied Customers:

    349
    ASE & Bosch Certified Master Tech. Over 30 years experience.
< Last | Next >
  • http://ww2.justanswer.com/uploads/EU/eurotec/2012-6-11_13153_mpjaphoto.64x64.JPG Marty's Avatar

    Marty

    European Car Expert

    Satisfied Customers:

    349
    ASE & Bosch Certified Master Tech. Over 30 years experience.
  • http://ww2.justanswer.com/uploads/IN/indytech/2013-8-8_102717_SantoDomingo146598x6402.64x64.jpg Greg's Avatar

    Greg

    Shop Owner

    Satisfied Customers:

    1040
    17 years Shop Owner /Technician. 27 years experience,
  • http://ww2.justanswer.com/uploads/CR/crzydrvr00/2013-11-3_12123_246347.64x64.jpg Richard's Avatar

    Richard

    UK Car Mechanic

    Satisfied Customers:

    472
    12 years as a technician at a Ford and Jaguar dealer Ford and Jaguar factory certified
  • http://ww2.justanswer.com/uploads/35/350matt/2012-6-7_182356_matsavatr.64x64.jpg Matt's Avatar

    Matt

    Mechanical Engineer

    Satisfied Customers:

    4034
    BEng hons Mech engineering, in auto industry 22 years
  • http://ww2.justanswer.com/uploads/NA/nabilc/2011-1-24_205715_jap500.64x64.jpg Billy's Avatar

    Billy

    Trainer/Master tech.

    Satisfied Customers:

    1276
    Trainer - master tech., SAE member
  • http://ww2.justanswer.com/uploads/witt0018/2009-02-09_180738_trev2.jpg Trevor Witting's Avatar

    Trevor Witting

    UK Car Mechanic

    Satisfied Customers:

    815
    NVQ 3, Modern Apprenticeship, MOT Tester, 15+ years experience diagnostic technician
  • http://ww2.justanswer.com/uploads/RO/RobMechanic/068.64x64.JPG Rob's Avatar

    Rob

    UK Car Mechanic

    Satisfied Customers:

    811
    city and guilds level 1 2and 3. mot tester , 28 years experience set up training college in afghanistan