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 Dodgerench Your Own Question

Dodgerench
Dodgerench, ASE Certified Technician
Category: Chrysler
Satisfied Customers: 3140
Experience:  30+ years Dodge/ Chrysler exp., ASE Master with L1 certification. Driveability/ combustion specialist
4486286
Type Your Chrysler Question Here...
Dodgerench is online now
A new question is answered every 9 seconds

2007 pacifica: gas gauge..die..two gallons car start..gas station

Customer Question

i have a 2007 pacifica gas gauge reads ok sometimes and not sometime,when it shows empty the car will die, put in two gallons car start ups, go to gas station it will only hold a few gallons .
Submitted: 4 years ago.
Category: Chrysler
Expert:  Dodgerench replied 4 years ago.
Hi and welcome to Just Answer!.

It sounds like you need a fuel pump. That sounds pretty simple, but let me explain...

The fuel tank on your Pacifica is a saddle type unit, something split in two by the need for a rear driveshaft on the AWD units whether you have this or not.

Filling the vehicle means you spill fuel into the left side of the tank, which then transfers to the right as fuel levels exceed about 3/4.

Since any fuel level below 3/4 means the sides are isolated, there were provisions made to move fuel from the right to the left, which is where your actual fuel pump lives.

This is done by using an ejector system. Fuel pump output to the engine is sent from the right to the left side of the engine, with any excess fuel being diverted to an ejector that sprays a strong jet of fuel through an orifice that is connected to the left side of the tank. Normal operation means more fuel is transferred than is used, so excess fuel on the right side tank is shuttled over to the left if things work properly.

In the case of a weak pump, you'll have less ejector spray, which means fuel transfer from the right side simply doesn't happen. The crazy thing is that the fuel pump is still healthy enough to sustain normal engine functions but isn't robust enough to get fuel moved from the dead side of the tank to the other. The result is that the left side goes dry and the refuel process can hold only a small portion of what the tank is rated for... since the right side still has plenty of fuel in reserve.

It does get complicated! I fell head over heels into this trap on the first Pacifica problem of this nature, mistakenly replacing the right side fuel module since it seemed to have the deciding factor for fuel transfer... and there were no running problems otherwise. It took a scale mockup of the actual parts immersed in fuel to show me what the problem was.

Weak pump.

I believe this to be the same problem.
Let me know if you have any questions... I'll be glad to help.

Thanks,
Ed

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
Dodgerench
Dodgerench
Chrysler Mechanic
3140 Satisfied Customers
30+ years Dodge/ Chrysler exp., ASE Master with L1 certification. Driveability/ combustion specialist