Jeep

Have Jeep questions? Ask a Jeep repair expert for answers

Ask an Expert,
Get an Answer ASAP!

I have a 97 Cherokee 4.0 auto 4wd. Just bought it drove it…

Customer Question
I have a 97 Cherokee...
I have a 97 Cherokee 4.0 auto 4wd. Just bought it drove it home ran it for half hr shut it off wouldn't start back up. Cranks but no start. Fuel pump doesn't prime, no power to the coil. Figured crank sensor replaced it and still nothing. Checked all my grounds and fuses all good. Need help!!!!!
Submitted: 2 years ago.Category: Jeep
Show More
Show Less
Ask Your Own Jeep Question
Answered in 14 minutes by:
2/26/2016
Jeep Mechanic: Jerry, Master Mechanic replied 2 years ago
Jerry
Jerry, Master Mechanic
Category: Jeep
Satisfied Customers: 17,221
Experience: ASE Master...30+ years...Shop owner..engine builder..collision structural repair
Verified

Hello and welcome. My name is ***** ***** you for visiting the site.

.

That is normally the ASD relay if the fuses are all good.

.

If you accept my additional service request for your email address, you can give me your email in a private info box and I'll send you the test instructions for it and location of it, along with a wiring diagram in a PDF file, the file is rather large.

You will just have to accept the additional service offer and ENTER your email address in the “ENTER CONTACT INFO” section so that I can see it, Thanks

Ask Your Own Jeep Question
Customer reply replied 2 years ago
My ASD is not clicking nor my fuel relay. If I jump the ASD I get power to my coil but still no fuel pump. But if I jump the fuel pump as well it does work. But still won't run. I am thinking my ecm is junk?
Jeep Mechanic: Jerry, Master Mechanic replied 2 years ago

I see, thanks. That is possible but, just to be sure, are there any after market security systems installed on it?

.

Do you get spark to the plugs when the relays are both jumped out?

Ask Your Own Jeep Question
Customer reply replied 2 years ago
Plug in code reader and it says no communication. When I turn the key on it does not flip the gages or show the volts or fuel level. It is a sport model with crank windows and manual locks. I tried unlocking and locking the doors just in case but there is no red security light anywhere.
Customer reply replied 2 years ago
No spark when I jump the ASD either. And I do have constant power to the ecm and when I turn the ignition on another wire sends power to it
Jeep Mechanic: Jerry, Master Mechanic replied 2 years ago

That is probably something that is not as bad as it appears. However, I have never run into that on one of them, (yet) and I don't want to condemn the PCM just yet. Please allow me to step out and see if someone else may have encountered that on any of them. Thank you for your patience and sorry I was not able to help get it fixed for you.

Ask Your Own Jeep Question
Jeep Mechanic: Randall C, ASE Master Tech replied 2 years ago
Randall C
Randall C, ASE Master Tech
Category: Jeep
Satisfied Customers: 13,328
Experience: ASE Master Tech, L1, Jeep owner, Shop owner
Verified

Hello, I am Randall, Do you have a testlight? how are you confirming power to PCM? does check engine light come on with key to RUN?

Ask Your Own Jeep Question
Customer reply replied 2 years ago
I have a test light and I checked the power to ecm thru one of the plugs. And no there is no cel on the dash when turn the key on or gages moving
Jeep Mechanic: Randall C, ASE Master Tech replied 2 years ago

ok, to backup, the check engine light does NOT come on with key on like it should? do you have wire colors at PCM you checked for power?

Ask Your Own Jeep Question
Customer reply replied 2 years ago
The check engine light does not come on when I turn the key to on. And none of the gages read either. I cannot remember the color of the wires that had power to the ecm but I can tell you tomorrow.
Jeep Mechanic: Randall C, ASE Master Tech replied 2 years ago

im not going to be online good bit of day on Friday, I really need you near vehicle so since our schedules will differ, I suppose I too will opt out, I cant send the answer without a couple tests, I am sorry

Ask Your Own Jeep Question
Customer reply replied 2 years ago
Thank you for trying. I am just trying to figure out a definitive way to determine if I have a bad ecm without paying 150 bucks to find out.
Jeep Mechanic: Randall C, ASE Master Tech replied 2 years ago

ok let me do this, best I can do without tests. the lack of running, lack of CEL and other symptoms? you have one of a couple things.

Yes, PCM could be bad but rare, so,, in one connector at the pCm are 2 wires, you need to unplg, turn key ON and probe the Dark green/black and the Dark blue/white wires

if missing power on any? you have a power supply issue and likelya fuse or wiring to the PCM so

In the under hood fuse box, be sure to swap out fuses 18,20 and 21, AND swap fuse #11 in theinside fuse box

If you have power to BOTH the dk blue/white and.. the dk green/balck at the PCM? with key ON? then you have a bad PCM

Ask Your Own Jeep Question
Jeep Mechanic: Randall C, ASE Master Tech replied 2 years ago

here is a link to to the power /grounds to the PCM as well as oter powertrain diagrams, focus the power supplies only , the CEL is the clue the PCM is not powering up OR you have a power problem to the PCM

Ask Your Own Jeep Question
Customer reply replied 2 years ago
OK don't drop out I'll get back to you after I try it tomorrow and let you know.
Jeep Mechanic: Randall C, ASE Master Tech replied 2 years ago

its the best i have, I have sent all the diag info there is persay, You have to take from here, LMK

Ask Your Own Jeep Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a jeep mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Randall C Your Own Question
Randall C
Randall C
Randall C, ASE Master Tech
Category: Jeep
Satisfied Customers: 13,328
13,328 Satisfied Customers
Experience: ASE Master Tech, L1, Jeep owner, Shop owner

Randall C is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

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

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.

StanSayre, 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!!!!

AlexLos 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.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, 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.

EstherWoodstock, NY

< Previous | Next >

Meet the Experts:

Chris

Chris

Shop Foreman

3,449 satisfied customers

Jeep Certified Master Tech

Mark

Mark

22 Year Factory trained technician

2,593 satisfied customers

Jeep factory training........25 years in the industry.

Dave

Dave

Jeep Master Tech

1,149 satisfied customers

Chrysler Triple Master, ASE master Tech AA degree in Auto.

moparfl

moparfl

ASE Certified Technician

1,130 satisfied customers

ASE Master Tech Chrysler Dodge Jeep Master Tech

Tim Mohr

Tim Mohr

ASE MASTER TECH

1,021 satisfied customers

30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL

Ron Z.

Ron Z.

- Jeep Tech -

629 satisfied customers

18+yrs experience. State Inspector & Jeep Diagnostics/Repair

jeepmopar76

jeepmopar76

Jeep/Chrysler Triple Master Tech

579 satisfied customers

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

< Previous | Next >

Related Jeep Questions
Hi, my girlfiends 2002 Jeep Liberty wont start, no sound
Hi, my girlfiends 2002 Jeep Liberty wont start, no sound after key is turned just fuel pump whine, no solenoid kicking in or starter turning... here is what I have done/checked battery tested ok clean… read more
brownjeff
brownjeff
Associate Degree
13,873 satisfied customers
WHAT IS CAUSING MY JEEP TO DIE (STALL) AT IDLE RPM'S, OR UP
WHAT IS CAUSING MY JEEP TO DIE (STALL) AT IDLE RPM'S, OR UP TO 1200 RPM, IN GEAR OR OUT OF GEAR ? IF KEPT AT A FAST IDLE UNTIL I GET TO AN INTERSTATE, RUNS GOOD AT 50/60 MPH. RELAYS ALL CHECK GOOD, CO… read more
Glenn
Glenn
Technician/Trainer
Vocational, Technical or Trade Scho
392 satisfied customers
i need a diagram of the fuse panel for a 93 jeep grand cherokee
i need a diagram of the fuse panel for a 93 jeep grand cherokee limited 5.2… read more
Arench
Arench
President
CT State GED w/ Honors
1 satisfied customers
Fuel pump wont turn on. but if i remove the relay and put a
fuel pump wont turn on. but if i remove the relay and put a jumper wire on it runs fine and the jeep starts … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
2000 jeep wrangler 2.5........changed out fuel pump with a
2000 jeep wrangler 2.5........changed out fuel pump with a Bosch pump. Now it has trouble starting. stumbles and smells like flooding. checked pressure with key on engine off 48psi. then drops off rig… read more
kalamykid
kalamykid
Pactor automotive
Vocational, Technical or Trade Scho
97 satisfied customers
Fuel not being supplied to engine. Fuel pump and filter both
Fuel not being supplied to engine. Fuel pump and filter both new. 1995 wrangler 4 cylinder. … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
5,468 satisfied customers
My fuel pump is not engaging and i have just replaced it.
my fuel pump is not engaging and i have just replaced it. … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
1991 Jeep Wrangler suspected fuel pump failure. I jumped the
1991 Jeep Wrangler suspected fuel pump failure. I jumped the fuel pump relay and I can hear the pump engaging but I am not getting fuel to the fuel rail. Fuel guage claims there is 1/4 of a tank. I ad… read more
kalamykid
kalamykid
Pactor automotive
Vocational, Technical or Trade Scho
97 satisfied customers
Can a fuse protected hot wire be used to run fuel pump in a
can a fuse protected hot wire be used to run fuel pump in a old jeep? … read more
Chris
Chris
Shop Foreman
3,449 satisfied customers
I got a 97 jeep cherokee 4.0 4x4. The fuel pump Astin. The
I got a 97 jeep cherokee 4.0 4x4. The fuel pump Astin … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
No spark or fuel pump. will not start after running til
no spark or fuel pump. will not start after running til warmed up> Shut off and then won't start. New crank sensor, new cam shaft sensor and rebuild ECM … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
Having problems getting the fuel pump to run/ no power back
Having problems getting the fuel pump to run/ no power back to the fuel pump. It's in a 2002 Jeep Liberty … read more
Mark
Mark
22 Year Factory trained technician
Vocational, Technical or Trade Scho
2,593 satisfied customers
No power to fuel pump, fuel pump works, no spark, will
No power to fuel pump, fuel pump works, no spark, will crank … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
2001 Jeep Grand Cherokee Wont Start. Security light stays
2001 Jeep Grand Cherokee Won't Start. Security light stays on while the key is on. My MODIS won't communicate with ECM however my little pocket scanner does communicate and it says no codes. Another w… read more
Scott
Scott
253 satisfied customers
Where is and how do you replace a fuel filter on a jeep liberty
where is and how do you replace a fuel filter on a jeep liberty… read more
sprinkles08
sprinkles08
Technician
High School or GED
11 satisfied customers
1997 jeep grand cherokee: location of the fuel pump cut off switch
i am trying to find the location of the fuel pump cut off switch in my 1997 jeep grand cherokee… read more
ricardo hohl
ricardo hohl
automotive instructor
Associate Degree
1,818 satisfied customers
Jeep Patriot Limited: My gas tank will not allow me to fill
My gas tank will not allow me to fill on my Pat. I have tried going slowly, and every possible angle. What I've heard is that the charcoal filter/canister is eaten up and the entire fuel system needs … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
2007 jeep liberty: I came back, it wouldnt start, nothing..controls
I shut off my 2007 jeep liberty, went shopping, when I came back, it wouldn't start, nothing from the starter. all other power controls worked, windows, radio, but nothing when the key was turned to s… read more
Chris
Chris
Shop Foreman
3,449 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x