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 autotech155 Your Own Question

autotech155
autotech155, ASE Certified Technician
Category: Car
Satisfied Customers: 428
Experience:  29 years ,drivability brakes ,a/c,trans repair,engine repair
9735467
Type Your Car Question Here...
autotech155 is online now
A new question is answered every 9 seconds

1999 cadillac deville: run fine..cruise speeed on highway..rpms

Resolved Question:

i have a 1999 cadillac deville de elagance i recently changed engine and i replaced a y engine with a 9 engine will i need to do any thng else to car to make this work right car seems to run fine but has a surging issue at low speeds 40mph and at cruise speeed on highway also noticed the car shifts at lower rpms than 9 engine shud and will only go 110mph how can i fix these problems do i need do switch computers and will it work with digital dash
Submitted: 6 years ago.
Category: Car
Expert:  autotech155 replied 6 years ago.
Hello welcome to JA, The 2 motors will as i have changed them with out any problems, you may have a vacuum leak at the throttle bodyb housing and that woud cause the surging problem and may als affect the operation of he transas well. The only differemce between the 2 motors is onwe is a hig performabce and the other is your standard engine, You may want to have a scann run on the car and see if maybe one of the sensors is not working right on if you do have a small vacuum leak. Eric
Customer: replied 6 years ago.
Relist: I prefer a second opinion.
Expert:  autotech155 replied 6 years ago.
Hello what is it that yoju need a second opioionm opn if i maty ask Eric
Customer: replied 6 years ago.
i need to no if the computers are different pretty sure i do not hav vacumm leak and if throttle body is bigger or injectors are different between the 9 and the y engine
Expert:  autotech155 replied 6 years ago.
The injectors are the same ,but the computers i dont think are the same because the fule and timming will be diifferent. I wouls check the wiring going down to the cran sesnors and make sure the wiring isnt soaked with oil,because this wouyld cause the woring to become bare and then not let the car start. Eric
Customer: replied 6 years ago.
can i switch computers isit compatible with digital dash where most 9's are analog dash
Expert:  autotech155 replied 6 years ago.
Yes you have a diffderent computer thst contrils the dash functions Eric
Customer: replied 6 years ago.
do u mean i can switch engine computer but thers seperate computer 4 dash
Expert:  autotech155 replied 6 years ago.
yes tetre is another computer its called a bcm body control module. Eric
Customer: replied 6 years ago.
so more than likely i need a 9 computer probly fix my surging issues and better shifts wher do i find engine computr and and how do itell them apart
Expert:  autotech155 replied 6 years ago.
OK there will be numbers in the side if the computer,but you may be able to take the old computer out and have it reprgamed for the 9 computer. Eric
autotech155, ASE Certified Technician
Category: Car
Satisfied Customers: 428
Experience: 29 years ,drivability brakes ,a/c,trans repair,engine repair
autotech155 and 2 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
 
 
 
Chat Now With An Auto Mechanic
autotech155
autotech155
Auto Mechanic
428 Satisfied Customers
29 years ,drivability brakes ,a/c,trans repair,engine repair