Jeep

Have Jeep Questions? Ask a Jeep Repair Expert for Answers

Ask an Expert,
Get an Answer ASAP!

Jeep

I am working on a 2001 Jeep Grand Cherokee 4.7. THis one is

Customer Question
a real puzzler and I...
I am working on a 2001 Jeep Grand Cherokee 4.7. THis one is a real puzzler and I am missing something here. First quick history of this vehicle. Customer overheated engine so bad a valve seat dropped in right head. I removed the head and had it reconditioned at machine shop. After installing the head and running about half hour, I moved the vehicle to jack up and bolt down exhaust. When I did the engine started acting up and shutting off. If I accelerated with foot on brake, the ASD fuse would blow. Long story short...after blowing many 30 amp fuses trying to find short. I was short on fuses and put 50amp fuse in to get the customer back from taking it to another shop for diagnosis. I did eventually show up as a shorted ignition coil. However, it fried the PCM and needed replaced. Thinking for sure the coil and new PCM would fix the problem, same issue still exists. I installed a digital amp meter in the ASD fuse location. Start engine up and amperage is fine, 3 to 5 amps. Then if allowed to idle it will eventually shut off and restart every time. However, if I crack the throttle the slightest amount the amperage starts to spike over 30amps and engine will start misfiring one cylinder at a time and eventually shut down. PCM seems to go into an individual cylinder shutdown. Weird thing is if I hold the throttle just off idle and it starts acting up. If I unhook the TOS, it will run fine until I hook it back up. I can rev the engine and everything without misfire. I studied the schematic and as far as I can tell the only circuit without a lighter fuse down stream is the ignition coils. I have tried all sorts of elimination technics but come up with nothing yet. Any ideas concerning this very strange electrical issue? THanks!
Submitted: 1 year ago.Category: Jeep
Show More
Show Less
Ask Your Own Jeep Question
Customer reply replied 1 year ago
I see no edit price link but gladly will pay more for good answer
Answered in 11 hours by:
11/5/2016
Jeep Mechanic: sprinkles08, ASE Certified Technician replied 1 year ago
sprinkles08
sprinkles08, ASE Certified Technician
Category: Jeep
Satisfied Customers: 23,233
Experience: Chrysler/Dodge/Jeep Master Certified, ASE Master and Advanced Certified, Trans and Hybrid Specialist
Verified

Hello and welcome to JustAnswer!

Current draw on the ASD circuit is climbing due to excessive ignition dwell because of incorrect cam timing, this is a common issue when one is reassembled incorrectly. You'll need to again remove the valve covers and timing cover and set cam timing correctly. There may just be an issue with the right secondary chain or the primary chain throwing the whole engine off; the left secondary may be incorrect also but is not monitored because the cam sensor is on the right bank.

Ask Your Own Jeep Question
Customer reply replied 1 year ago
I did replace the right chain when head was removed because tensioner was all the way extended. Could not replacing left chain as well cause this problem? I was pretty sure timing marks are correct. thanks!
Jeep Mechanic: sprinkles08, ASE Certified Technician replied 1 year ago

Replacing the left secondary chain wouldn't cause this as that side is not monitored. Cam timing between the crankshaft and right camshaft is incorrect.

Ask Your Own Jeep Question
Customer reply replied 1 year ago
Ok..I will check it out! Thanks! Been a technician for 30 plus years and never heard of anything so crazy! Wonderful design...LOL
Jeep Mechanic: sprinkles08, ASE Certified Technician replied 1 year ago

You're welcome and good luck with it!

Ask Your Own Jeep Question
Ask sprinkles08 Your Own Question
sprinkles08
sprinkles08
sprinkles08, ASE Certified Technician
Category: Jeep
Satisfied Customers: 23,233
23,233 Satisfied Customers
Experience: Chrysler/Dodge/Jeep Master Certified, ASE Master and Advanced Certified, Trans and Hybrid Specialist

sprinkles08 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

3,406 satisfied customers

Jeep Certified Master Tech

Mark

Mark

22 Year Factory trained technician

2,591 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

1,015 satisfied customers

30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL

Ron Z.

Ron Z.

- Jeep Tech -

621 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
Jeep not starting, lights and chimes work intermittently.
jeep not starting, lights and chimes work intermittently … read more
Gunvir Singh
Gunvir Singh
1,691 satisfied customers
No sound from radio. 2012 jk. Came with. Jk sport no nav.
Yes took neg battery term of for ten minutes. Got some sound bars then nothing … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
2002 Jeep Liberty 3.7 can you get the cylinder head bolts
2002 Jeep Liberty 3.7 can you get the cylinder head bolts torque and timing chain install this engine came in number 2 cylinder no compression all others 180 psi. Look like number 2 cylinder drop the … read more
Michael Solis
Michael Solis
237 satisfied customers
My tail lights, brake lights, dash lights, and radio are not
My tail lights, brake lights, dash lights, and radio are not working. And also the heat.. … read more
Mechanic01
Mechanic01
1,128 satisfied customers
The cruise and vent control stopped working at same
The cruise and vent control stopped working at same time...1992 jeep cherokee larado 4.0 … read more
Todd M
Todd M
Owner
ASE Certification
1,274 satisfied customers
I have a 2015 Jeep Grand Cherokee. I need an anti theft code
I need an anti theft code for the radio I just put in my Jeep? … read more
Peter Bagley
Peter Bagley
master technition
Vocational, Technical or Trade School
892 satisfied customers
2015 Jeep Grand Cherokee SRT; The blower stops working off
2015 Jeep Grand Cherokee SRT; The blower stops working off and on. Won't blow A/C or heat when I turn the dial. Yesterday it didn't work. Today it came back on for a while then stopped again.??? … read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
I have a 2008 Jeep liberty. Never had any problems with it
I have a 2008 Jeep liberty. Never had any problems with it and it still runs great. But now when I turn the heat on I get no heat, just cold air. The car is running well and doesn't over heat. … read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
3,996 satisfied customers
2008 Jeep Compass put in dealership for crossmember
2008 Jeep Compass put in dealership for crossmember replacement under extended warranty had control arms replaced same time. When i retrieved my jeep the Traction control light was on with no engine p… read more
Gunvir Singh
Gunvir Singh
1,691 satisfied customers
Check engine light came on for "incorrect gear ratio" Stay
check engine light came on for "incorrect gear ratio" … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
I have an 87 Grand Wagoneer which seems to be going through
Hi, I have an 87 Grand Wagoneer which seems to be going through ignition modules very often. Is there something that I can do to upgrade the ignition system to HEI or the like? … read more
Tim Mohr
Tim Mohr
ASE MASTER TECH
Master's Degree
1,015 satisfied customers
07 grand Cherokee 3.7l driving and rear wheels locked up and
07 grand Cherokee 3.7l driving and rear wheels locked up and appeared as if smoke was coming from differential … read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
I am having such a problem. My car has issues. The scariest
I am having such a problem. My car has issues. The scariest is the suspension adjusts itself and the dealer mechanic says it doesn't have auto susp.… read more
Jaybird61
Jaybird61
Master Automotive Mechanic
1,879 satisfied customers
I am working on a 06 jeep with a 2.8 L diesel, and I need
Hello , I am working on a 06 jeep with a 2.8 L diesel , and I need info on the turbocharger … read more
Robert R
Robert R
Auto Technician
Vocational, Technical or Trade Scho
879 satisfied customers
I have a 2009 Jeep Grand Cherokee 3.7l v6. I have two
Hi I have a 2009 Jeep Grand Cherokee 3.7l v6. I have two questions. I have an ETC red lightning bolt light on as I drive. Can you explain that and how to solve it. Second, I have an engine light and c… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
I get a constant squeeking from my brakes when I am moving
Second opinion] I get a constant squeeking from my brakes when I am moving at only about 10 MPH and apply brake… read more
Peter Bagley
Peter Bagley
master technition
Vocational, Technical or Trade School
892 satisfied customers
It stops intermittently, but restarts. at least so far.
it stops intermittently, but restarts. at least so far … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
2006 Jeep Commander, 3.7 L, 6 Cy. Base Model: When I turn on
2006 Jeep Commander, 3.7 L, 6 Cy. Base Model: When I turn on the heater blower switch to high (on heat), after about 10 seconds, the blower stops, all dash indicator lights blink, go out. I don't loos… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 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