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 Ivan Your Own Question

Ivan
Ivan, ASE Certified Master Technican
Category: Cadillac
Satisfied Customers: 4870
Experience:  ASE Master Tech w/ 20+ years in the field. Self employed for 9 years. Member of AUTOLAB radio show.
10772012
Type Your Cadillac Question Here...
Ivan is online now
A new question is answered every 9 seconds

my 91 Cadillac Deville dies while driving down the road, then

Customer Question

my 91 Cadillac Deville dies while driving down the road, then will restart after 10 or 15 minutes, there is no ryme or reason to when it will stall.   
I put in a new fuel pump but no change . someone said to change the fuel pump relay
can you help?
Submitted: 5 years ago.
Category: Cadillac
Expert:  Ivan replied 5 years ago.

HelloCustomer For the car to stall, you are either losing fuel to the engine or spark at the spark plugs. Before you replace anything else, let's figure out what we are losing. This is the first thing I want you to do. Keep a can of carburetor cleaner in the car with you, When the car stalls, try to restart, if it doesn't start, Take the air snorkel off of the top of the throttlebody, Spray a liberal amount of carb cleaner into the throttle body. Try to start the car, see if it tries to start. Any signs of life are what we are trying to see here. If it stumbles and stalls or starts for a second, we can assume it has spark and fuel is our issue. If it does not make any change at all, remove one spark plug wire, insert a screwdriver into the end and place it near a metallic surface. You may need a second person if you can't position this so you can see it. Crank the engine, is there good blue spark. Let's start with these tests first. Let me know what you find and we'll continue with the next steps.

 

Your JA Expert,

Ivan

Ivan, ASE Certified Master Technican
Category: Cadillac
Satisfied Customers: 4870
Experience: ASE Master Tech w/ 20+ years in the field. Self employed for 9 years. Member of AUTOLAB radio show.
Ivan and 7 other Cadillac Specialists are ready to help you
Customer: replied 5 years ago.
I did what you said and when the car stalled I sprayed some starting fluid in the throttle body and the car started and continued to run , sometimes when I turn it off when it is hot ir will not restart until it cools off
Expert:  Ivan replied 5 years ago.
Ok, let's see if that is the norm. Give it a few more times to stall or not start and let's see if it restarts with carb cleaner every time. Try to verify it won't restart just prior to spraying. Let's make sure this is predictable. If it works everytime, we are going to focus on fuel pressure and fuel delivery. Keep me posted. Let's find out at least one more time stalling and one hot no start .
Customer: replied 5 years ago.
<p>it started the first time and drove 25 mi. (40 mins)</p><p>turned it of at wal mart </p><p>it started when I came out and went 1/4 mile and died after starving for fuel</p><p>waited 30 mins </p><p>started it with ether </p><p>went another mile & it died</p><p>waited 20 mins & started it again with a shot of ether </p><p>went 1/2 mile & it died again </p><p>and so on and so forth 2 more times until I made it home</p>
Expert:  Ivan replied 5 years ago.

Ok, that pretty much makes me feel confident that we have a fuel issue. I think we are dealing with a fuel pump. Your engine has a fuel pressure test fitting on the fuel rail, let's get a fuel pressure guage on this vehicle. Tape it to the winshield and go for a ride. Let's make sure fuel pressure is dropping when these episodes occur. If so, I want to verify power to the fuel pump when the car is dead. If so, we are going to look at this fuel pump and fuel filter. If fuel pressure remains high, we are going to focus on fuel injector pulse. The fuel pressure you should find is:

 

Ignition ON Engine OFF 40 - 50 psi
Idling With Vacuum hose Connected To Regulator 32 - 38 psi

Customer: replied 5 years ago.
i understand everything you said except where to find the connection for the pressure guage and the part where you said
"Idling with Vacuum hose connected to regulator"
Customer: replied 5 years ago.
where do I connect the pressure guage , and what do you mean by "Idling with Vaccum hose Connected to Regulator" ?
Expert:  Ivan replied 5 years ago.

At the fuel pressure regulator you will find a vacuum line connected to it. This is where you would either disconnect or reconnect the vacuum hose. Here are two pictures to help you find it.

 

graphicgraphic

 

Here is the location of the test port. It's under this cap.

 

graphic

 

 

 

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:

 
 
 
  • Dave Nova

    Cadillac Technician

    Satisfied Customers:

    1469
    ASE Master Certification. GM World Class Certification
< Last | Next >
  • http://ww2.justanswer.com/uploads/DT/dt69nova/2012-6-15_234154_pic1.64x64.jpg Dave Nova's Avatar

    Dave Nova

    Cadillac Technician

    Satisfied Customers:

    1469
    ASE Master Certification. GM World Class Certification
  • http://ww2.justanswer.com/uploads/JF/JFN1/2011-2-26_33039_180754101501129867381533152761315265045893127711n.64x64.jpg Jerry Newton's Avatar

    Jerry Newton

    Cadillac Technician

    Satisfied Customers:

    1181
    ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience.
  • http://ww2.justanswer.com/uploads/PE/peterpete190/2012-2-24_1274_20120215135406.64x64.jpg Pete's Avatar

    Pete

    Cadillac Technician

    Satisfied Customers:

    1133
    15 years Cadillac experience as a technician.
  • http://ww2.justanswer.com/uploads/testedtuff/2009-09-26_170108_pictures.jpg John's Avatar

    John

    ASE Certified Technician

    Satisfied Customers:

    941
    ASE CERTIFICATIONS A1-A8 & L1 / 40 YEARS AUTOMOTIVE EXPERIENCE
  • http://ww2.justanswer.com/uploads/joecamel90/2008-11-13_03615_head_shot.jpg George H.'s Avatar

    George H.

    ASE Certified Technician

    Satisfied Customers:

    595
    ASE Master Tech 15+ Years
  • http://ww2.justanswer.com/uploads/MO/molurch/2012-6-6_214526_500.64x64.png Don 'Mo Lurch''s Avatar

    Don 'Mo Lurch'

    Cadillac Technician

    Satisfied Customers:

    462
    GM, Cadillac Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.
  • http://ww2.justanswer.com/uploads/tsmodie/2009-6-10_144056_tim.jpg Tim Mohr's Avatar

    Tim Mohr

    ASE MASTER TECH

    Satisfied Customers:

    385
    30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL