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 Amedee Your Own Question

Amedee
Amedee, Jeep Technician
Category: Jeep
Satisfied Customers: 21871
Experience:  ASE Master Technician advanced level specialist. Wisconsin certified emissions state inspector
279429
Type Your Jeep Question Here...
Amedee is online now
A new question is answered every 9 seconds

2001 Jeep Cherokee Sport: 4.0L..I am having a hard start issue

Customer Question

Greetings,

2001 Jeep Cherokee Sport, 4.0L

I am having a hard start issue. At first it was occasional (once every 10-20 starts) now, its almost all the time. It was setting the evap. code (loose gas cap?). I started squeezing the cap as i tightened to get more on it. Code doesn't set anymore. When it will not start, I push the gas peddle down a little and it will start but not idle. After a few minutes of two-footing it, it will idle.

Now for my "tail between the legs" story.

I was frantically looking for a solution to this problem and I came across something that mentioned a possible bad check valve in the fuel pump. So I installed an inline check valve... before I realized that this was a returnless fuel system. Now fuel is leaking from whatever the bulb looking thing is on the fuel rail (located between injector 3 and 4).

Did I ruin anything by installing the check valve?

How do I go about solving the hard start?

Thanks,

Kris
Submitted: 4 years ago.
Category: Jeep
Expert:  Amedee replied 4 years ago.
Greetings! You could have a bad fuel pump. I would rec to check fuel pressure. Fuel injected cars are very fuel pressure sensitive. Fuel pressure is very important and must be within specifications! But if the pressure is low, it does not mean the pump is bad. A plugged fuel filter, a pinched line, and low voltage at the pump can contribute to low fuel pressure. All three must be check before replacing the pump! You can get a fuel pressure gauge at a local auto parts store for cheap. =
Customer: replied 4 years ago.
What about the fuel leak? What about the fact that I put a check valve on a system that I wasn't supposed to?
Expert:  Amedee replied 4 years ago.

Well obviously that should not be there. I would simply recommend to take it out.

 

As far as the hard start goes, we need to see if in fact we have low fuel pressure when the engine is hard starting. THe best was to do this is with a fuel pressure gauge.

Customer: replied 4 years ago.
I wouldn't think it was a pressure issue. Once it gets started, it runs great, plenty of power. Can you tell me what the thing is that the fuel is leaking out of? And why It would be leaking there?

I'll try and track down a pressure guage in the meantime...
Expert:  Amedee replied 4 years ago.
Are you talking about the fuel pressure regulator?
Expert:  Amedee replied 4 years ago.

Or maybe the fuel damper?

 

 

Expert:  Amedee replied 4 years ago.
graphic
Customer: replied 4 years ago.
It's the damper
Expert:  Amedee replied 4 years ago.
If the damper is leaking fuel it will need to be replaced. If it is one with the fuel rail, the fuel rail will need to be replaced.
Expert:  Amedee replied 4 years ago.
Did you have any further questions?
Customer: replied 4 years ago.
what should the fuel pressure be at the rail? I'm trying to track down a rail now... need to replace before i can test the pressure...
Expert:  Amedee replied 4 years ago.
It should be at about 50 psi (give or take a few psi).

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:

 
 
 
  • 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
< Last | Next >
  • 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
  • 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
  • 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
 
 
 

Meet The Experts:

 
 
 
  • Mark

    22 Year Factory trained technician

    Satisfied Customers:

    2548
    Jeep factory training........25 years in the industry.
< Last | Next >
  • http://ww2.justanswer.com/uploads/MO/MoparCertified/2012-6-7_4142_mechanic.64x64.jpg Mark's Avatar

    Mark

    22 Year Factory trained technician

    Satisfied Customers:

    2548
    Jeep factory training........25 years in the industry.
  • http://ww2.justanswer.com/uploads/jeep10000/2008-9-18_222938_192601.jpg Chris's Avatar

    Chris

    Shop Foreman

    Satisfied Customers:

    2265
    Jeep and ASE Certified Master Tech
  • http://ww2.justanswer.com/uploads/ke4ich/2009-08-12_212931_DSC02211.JPG moparfl's Avatar

    moparfl

    ASE Certified Technician

    Satisfied Customers:

    1128
    ASE Master Tech Chrysler Dodge Jeep Master Tech
  • http://ww2.justanswer.com/uploads/nvltgo/2010-10-18_211525_youranswers.jpg Dave's Avatar

    Dave

    Jeep Master Tech

    Satisfied Customers:

    1120
    Chrysler Triple Master, ASE master Tech AA degree in Auto.
  • http://ww2.justanswer.com/uploads/tsmodie/2009-6-10_144056_tim.jpg Tim Mohr's Avatar

    Tim Mohr

    ASE MASTER TECH

    Satisfied Customers:

    805
    30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL
  • http://ww2.justanswer.com/uploads/CD/CDJMastertech/2012-6-9_201455_JustAnswerProfilelarger.64x64.JPG CDJMasterTech's Avatar

    CDJMasterTech

    Jeep MasterTech

    Satisfied Customers:

    576
    Factory trained and certified Jeep Master Technician, ASE Master Technician
  • http://ww2.justanswer.com/uploads/jeepmopar76/2009-3-18_2204_63998760.jpg jeepmopar76's Avatar

    jeepmopar76

    Jeep/Chrysler Triple Master Tech

    Satisfied Customers:

    572
    32yr ASE Master Tech, 9yr Chrysler Master Tech, 19 yr Jeep Dealership service including AMC/Eagle