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 John Your Own Question

John
John, triple chrysler master tech
Category: Chrysler
Satisfied Customers: 2251
Experience:  43 years,triple chrys ,ase master tech,l1,t2 b5 a1-a8 Hev spec.
9510839
Type Your Chrysler Question Here...
John is online now
A new question is answered every 9 seconds

2005 Pacifica: 3.5L..slightly downward roads the car seems to surge

Resolved Question:

I have a 2005 Pacifica w/ 3.5L engine. While driving at constan speed on level or slightly downward roads the car seems to surge. It feels like what you could do if you applied the brake at the same time as you press the accelerator pedal and then release the brake just slightly before you release the accelerator pedal. The engine idles great in Park, runs fine above ~45 mph and as long as you are accelerating or decelerating between 0 & ~45mph it runs/drives fine. Any ideas what this might be?   I suspect it is the transmission because the engine runs fine. Its almost like it want to change gears but a soon as it starts to it decides not to and that cycle continues to repeat until you decide to accel or decal a little. Thanks for any advice.
Submitted: 5 years ago.
Category: Chrysler
Expert:  John replied 5 years ago.
Hi my name is John.

Does it do this if you put the car in a different gear like 3 or 2?
Customer: replied 5 years ago.

Its been awhile since it was playing with putting the trans in a lower gear so will need try that again before I could say for sure. Its my wife's car so will not be able to try it again until this evening. This is my 1st time on this site can I log-on and send you an a reply later this evening?

Expert:  John replied 5 years ago.
Just come back to this question.

You can answer me by doing that.

John
Customer: replied 5 years ago.

Last evening it ran pretty well with very little surging while in Drive. There did seem to be a slight surge when tested in 2nd, 3rd & 4th gears. It hasn't worked this well in several months. Still curious for your opinion.

Expert:  John replied 5 years ago.
If it is the overdrive tring to engage it will cause this problem some times.

The throttle position sensor and the map sensor can also cause this problem.

Does it make any different if the gas tank is between 1/2 and 5/8 of a tank of gas?

You can also try wiggleing the TPS connector up and down just a little bit to see if the rpm will change.
Customer: replied 5 years ago.
The fuel level hasn't been a factor, the surge occurs at all levels. My original thought was that the torque converter was trying to lock up but didn't think it would do that at the low speeds. There are no trouble codes so I was less inclinded to suspect sensor problems. What would fuel level between 1/2 & 5/8 have to do with this symptom? When I take this in for service what do you recommend I tell them or make sure they check 1st before they tear in to the $$$$ transmission? Its out of warranty.
Expert:  John replied 5 years ago.
The 1/2to5/8 fuel is a software flash for not running right.

Before i would replace the torque converter,I would replace the throttle position sensor and map sensor first.Because they can cause this problem also.

I would have the computer updated with new software and have them test the map and TPS frist.

Let me know what else you want to know.

If i have help you,please push the accept button when were done.

Thank you for choosing just answer
John, triple chrysler master tech
Category: Chrysler
Satisfied Customers: 2251
Experience: 43 years,triple chrys ,ase master tech,l1,t2 b5 a1-a8 Hev spec.
John and other Chrysler 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 was skeptical at first but thought I'd give it a try. I was pleasantly surprised. Your site actually is a quality service that I would recommend to others in a heartbeat. Stan Sayre, PA
< Last | Next >
  • I was skeptical at first but thought I'd give it a try. I was pleasantly surprised. Your site actually is a quality service that I would recommend to others in a heartbeat. Stan Sayre, PA
  • I AM VERY GLAD THAT I TOOK A CHANCE ON YOUR PROBLEM SOLVING SKILLS. I WAS SUCCESSFUL IN REPLACING THE FUEL PUMP. MY TRUCK RUNS LIKE A CLOCK. IT RUNS LIKE THE DAY I BOUGHT IT. NO LUNGING FORWARD, THE TURBO REACTS THE SECOND I STOMP ON THE GAS, AND IT HAS A LOT MORE POWER AND EVEN SOUNDS BETTER TO ME. IT SAVED ABOUT $500.00 BY DOING THE WORK MYSELF. I GIVE YOU ALL THE CREDIT FOR YOUR DIAGNOSING THE PROBLEM, JUST FROM THE SYMPTONS I GAVE YOU OVER THE e MAIL. I WILL USE YOUR WEB SITE AGAIN AND REFER MY FRIENDS. THANKS SO MUCH FOR THE HELP. TOM WHITTAKER USA
  • Just a quick line to tell you how pleased I am to have my brakes working properly after all this time. Your answer was what I needed. I would certainly recommend you highly. God bless! Rev. Jerry Baysinger Holts Summit, Mo
  • I recently asked a question about my 2005 dodge ram, and I just wanted to let my Expert know that he hit the nail squarely on the head with his answer. I wanted to thank him again. Greg Pittsburgh, PA
  • Just a quick line to tell you how pleased I am to have my brakes working properly after all this time. Your answer was what I needed. I would certainly recommend you highly. God bless! Jerry Holts Summit, MO
  • Thank you so much for your answer. My initial estimate was $325; I got it done for $100 - part and labor. Lynn B. Ormond Beach, 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:

 
 
 
  • Don 'Mo Lurch'

    Aftermarket & Factory Electronics

    Satisfied Customers:

    384
    Chrysler Warnty, Heavy Line Mech, Mobile Electronics. Sales, Installation & Repair for 30 years
< Last | Next >
  • http://ww2.justanswer.com/uploads/MO/molurch/2012-6-6_214526_500.64x64.png Don 'Mo Lurch''s Avatar

    Don 'Mo Lurch'

    Aftermarket & Factory Electronics

    Satisfied Customers:

    384
    Chrysler Warnty, Heavy Line Mech, Mobile Electronics. Sales, Installation & Repair for 30 years
  • http://ww2.justanswer.com/uploads/2P/2paulm/2012-4-4_183431_justabswer.64x64.jpg Paul M ASE Master's Avatar

    Paul M ASE Master

    ASE Master Tech

    Satisfied Customers:

    117
    ASE Master Tech 20+ Years
  • 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:

    93
    16 years of experience
  • http://ww2.justanswer.com/uploads/IV/ivestoy2/2011-7-21_44030_ivan.64x64.jpg Ivan's Avatar

    Ivan

    ASE Certified Master Technician

    Satisfied Customers:

    55
    ASE Master Tech w/ 20+ years in the field. Self employed for 9 years. Member of AUTOLAB radio show.
  • http://ww2.justanswer.com/uploads/AC/acuramstr/2012-6-6_181032_me.64x64.jpg AUTOMSTR's Avatar

    AUTOMSTR

    ASE Certified Technician

    Satisfied Customers:

    0
    ASE Master Tech, L1, CA Smog ,30 YRS EXP
  • http://ww2.justanswer.com/uploads/AM/amedee/2013-10-24_23656_Amedee1.64x64.jpg Amedee's Avatar

    Amedee

    Chrysler Technician

    Satisfied Customers:

    787
    ASE Master Technician 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:

    432
    ASE Master tech. 30+ years mechanic, shop forman, service manager
 
 
 
Chat Now With A Chrysler Mechanic
John
John
Chrysler Mechanic
2251 Satisfied Customers
43 years,triple chrys ,ase master tech,l1,t2 b5 a1-a8 Hev spec.