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 Greg Your Own Question

Greg
Greg, import technician
Category: Mazda
Satisfied Customers: 5657
Experience:  17 years shop owner import
29331485
Type Your Mazda Question Here...
Greg is online now
A new question is answered every 9 seconds

1991 mazda 626: fuel, compression,spark.It..you choke the intake

Customer Question

My 1991 mazda 626 will not start. It has fuel, compression,spark.It will only fire if you choke the intake. Any suggestions on what to try. I have put in a new fuel pump and new spark plugs.
Submitted: 2 years ago.
Category: Mazda
Expert:  SuperDave replied 2 years ago.

Customer:

be sure you have the spark plug wire connected to the right cylinders

Expert:  SuperDave replied 2 years ago.
What Happens Now?

Your chat has ended, but you can still work with your Expert to get an answer to your question if you have not yet received one.

Come back to this page at any time to see additional information from your Expert.  You will also receive an email when your question is updated.  If you want to send a message to your Expert, use the box below.

If you have already received a satisfactory answer to your question, click the Accept button above.  Experts are credited for each accepted answer they provide.
Expert:  SuperDave replied 2 years ago.
how much compression does each cylinder have?
Customer: replied 2 years ago.
Spark plug wires were correct. The car still does not start. Each cylinder has between 120 and 150 compression.
Expert:  SuperDave replied 2 years ago.
be sure the spark is bright orange.if it is a blue spark it is weak and could be a bad coil
Expert:  SuperDave replied 2 years ago.
will it start with starting fluid?did you check fuel pressure?
Customer: replied 2 years ago.
It has a bright orange spark and it does start with starting fluid. The fuel pressure is 60 psi.
Expert:  SuperDave replied 2 years ago.

check to see if you have injector pulse to the injectors with a test light or noid light

Customer: replied 2 years ago.

yes i do. I tried turning the distributor 1/4" and it ran for about 5 seconds and then died.

Expert:  Greg replied 2 years ago.
Hi welcome to JA.com.I will answer your question the best I can,

If the car started after turning the distributor 1/4 turn then i suggest you check the timing belt is still on time.

You said compression was between 120 and 150 this is a big difference between the cylinders , you should no have more than 5 - 20 % difference between the cylinders.

Timing belts should be replaced at 60.000miles or every 5 years when was your belt last replaced.

Please check these items then get back to me for further assistance

Kind regards Greg
Customer: replied 2 years ago.
timing belt seems fine. when it ran for a few seconds it ran good. Ran number 1 cylinder to tdc and cam shaft was at timing mark.
Expert:  Greg replied 2 years ago.
hI

Okay put it back at TDC, then check the position of your rotor in the distributor
is it pointing towards the # 1 referenced from the Cap where #1 is.

Timing marks just to be sure.

Attachments are only available to registered users.

Register Here

Attachments are only available to registered users.

Register Here

Attachments are only available to registered users.

Register Here
View Full Image

Attachments are only available to registered users.

Register Here

Didt cap and #1 position,

Attachments are only available to registered users.

Register Here

Attachments are only available to registered users.

Register Here

Attachments are only available to registered users.

Register Here
View Full Image

Attachments are only available to registered users.

Register Here


Regards Greg
Customer: replied 2 years ago.
It does reference number 1 on the the cap. But will not fire there unless you turn the dist. a 1/4" advance. Does it have to be vacuum advanced to initiate start? The vacuum advance does work on the distrib. when you suck on the hose to the distrib. Is there any vacuum switches in the car that would keep it running? Is there a vacuum switch that keeps power to the fuel pump?
Expert:  Greg replied 2 years ago.
Hi

No vacuum advance is needed to start your engine .

So when you have the engine at TDC the rotor is pointing to the #1 .

There has to be something mis misaligned if the car will only fire if you turn the dis 1/4 turn
recheck the firing order of the ignition wires, you may have the 2 and 3 crossed?

Regards Greg

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
  • 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
 
 
 

Meet The Experts:

 
 
 
  • Drew

    Super Mazda Tech.

    Satisfied Customers:

    2176
    #1 rated Mazda technician. 17 yrs. experience as a shop owner. Mazda Certified with Ford, Linc. & Merc. experience. ASE L1 Advanced Certified Master Tech.
< Last | Next >
  • http://ww2.justanswer.com/uploads/supermazdatech/2010-8-24_54425_Self_Portrait.jpg Drew's Avatar

    Drew

    Super Mazda Tech.

    Satisfied Customers:

    2176
    #1 rated Mazda technician. 17 yrs. experience as a shop owner. Mazda Certified with Ford, Linc. & Merc. experience. ASE L1 Advanced Certified Master Tech.
  • http://ww2.justanswer.com/uploads/MA/mazdamaster577/2012-6-7_13242_IM001017.64x64.JPG mazdamaster577's Avatar

    mazdamaster577

    Master Technician

    Satisfied Customers:

    633
    mazda master/shop foreman for 15 years.
  • http://ww2.justanswer.com/uploads/joecamel90/2008-11-13_03615_head_shot.jpg George H.'s Avatar

    George H.

    ASE Certified Technician

    Satisfied Customers:

    354
    15+Years
  • http://ww2.justanswer.com/uploads/MI/mikeamechanic/2013-4-2_175558_photo.64x64.JPG Mike Kelly's Avatar

    Mike Kelly

    Mazda Mechanic

    Satisfied Customers:

    269
    17 years experience as an auto mechanic, foreign and domestic. 5 years running my own repair business.
  • http://ww2.justanswer.com/uploads/maddogtech/2008-12-13_185836_ed1.JPG Mazda Ed's Avatar

    Mazda Ed

    ASE Certified Technician

    Satisfied Customers:

    264
    ASE Certified Mazda Master Technician
  • 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:

    247
    16 years of experience
  • http://ww2.justanswer.com/uploads/DR/drivefast1971/2012-1-12_172422_0009051tQKh.64x64.jpg Ron Z.'s Avatar

    Ron Z.

    - Mazda Tech -

    Satisfied Customers:

    232
    18+yrs experience. State Inspector and Mazda Diagnostics