Dodge

Dodge Repair Questions? Ask a Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

This answer was rated:

Miss fire # 7 low compression. 2002 ram 1500. Plugs, wire,

Miss fire # 7...

Miss fire # 7 low compression

Mechanic's Assistant: What is the model/year of your Dodge?

2002 ram 1500

Mechanic's Assistant: Are you fixing your Ram 1500 yourself? What have you tried so far?

Plugs, wire, injector

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Light came on when idling

Mechanic's Assistant: Just to clarify, what are the exact lights you're talking about?

Check eng

Show More
Show Less
Ask Your Own Dodge Question
Answered in 1 minute by:
11/14/2017
Pete
Pete, Auto Service Technician
Category: Dodge
Satisfied Customers: 32,982
Experience: Over 17 years diagnosing and repairing automobiles various makes and models with some training and certifications.
Verified

Hi my name is ***** ***** I will be happy to assist with this today.In some cases I may need more info to assist better.I apologize for any delay.

Did you perform a compression test to see what the compression reading is on cylinder 7 compared to the others?

Let me know,thanks Pete

Ask Your Own Dodge Question
Customer reply replied 8 months ago
I believe it was 120

Have you done a leak down test at all?

Ask Your Own Dodge Question

Are the other cylinders more then 120?

Ask Your Own Dodge Question
Customer reply replied 8 months ago
all other cylinders were above

O.k.,try this add a small amount of oil to the cylinder through the spark plug hole.Then re check the compression.If the compression comes up at all quite a bit this indicates a fault with the piston,cylinder wall or rings on the piston.If the compression stays low or only comes up very slightly this indicates a fault with a valve in the cylinder head needing checked and replaced.You can also have a leak down test done to help determine if this is lower end with the piston,cylinder wall or rings or upper end with a valve issue.In most cases it is a burned or damaged exhaust valve needing replaced.

If more help is needed, use the reply tab to continue our conversation. If no further assistance is needed, kindly rate my service,your 5 star rating is appreciated ( should be a link to click on here or above).You can rate at any time and we can continue to work on your question as this will not close out your question.Keep in mind in some cases it can be difficult to fully diagnose or help repair your vehicle without seeing it and I work on delivering the best possible answer from what I see to work with.

Thanks Pete

Pete
Pete, Auto Service Technician
Category: Dodge
Satisfied Customers: 32,982
Experience: Over 17 years diagnosing and repairing automobiles various makes and models with some training and certifications.
Verified
Pete and 87 other Dodge Specialists are ready to help you
Ask your own question now
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a dodge mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Pete Your Own Question
Pete
Pete
Pete, Auto Service Technician
Category: Dodge
Satisfied Customers: 32,982
32,982 Satisfied Customers
Experience: Over 17 years diagnosing and repairing automobiles various makes and models with some training and certifications.

Pete 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:

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 WHITTAKERUSA

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 BaysingerHolts 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.

GregPittsburgh, 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!

JerryHolts Summit, MO

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

< Previous | Next >

Meet the Experts:

Jerry

Jerry

Master Mechanic

1,754 satisfied customers

ASE Master tech, 30 years exp. troubleshooter, driveability tech

Chris

Chris

Shop Foreman

7,046 satisfied customers

Dodge/Cummins and Chrysler Certified Master Tech

Mopar Certified

Mopar Certified

Dodge Technician

6,072 satisfied customers

24 Year Chrysler/Dodge Certified Specialist

moparfl

moparfl

ASE Certified Technician

3,292 satisfied customers

ASE Master Tech Gold level Chrysler Status 30 years dealership exp

Dodgerench

Dodgerench

ASE Certified Technician

2,822 satisfied customers

30+ years Dodge/Chrysler exp., ASE Master with L1 certification. Driveability/ combustion specialist

Tim Mohr

Tim Mohr

ASE MASTER TECH

2,362 satisfied customers

30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL

Don - Mo Lurch

Don - Mo Lurch

Aftermarket & Factory Electronics

1,590 satisfied customers

Cert. Dodge & Chrysler Warnty, Heavy Line Mech, Mobile Electronics. Sales, Installation & Repair for 30 years

< Previous | Next >

Related Dodge Questions
I have a dodge ram 1500 5.9l. it has a #4 miss fire code
hi, i have a dodge ram 1500 5.9l. it has a #4 miss fire code showing. i have replaced, as a tune up, the coil, spark plugs, spark plug wires, distributor cap and rotor. the injectors are new as well a… read more
Amedee
Amedee
Automotive Consultant
Vocational, Technical or Trade Scho
19,176 satisfied customers
I have a 2002 dodge ram 1500 5.9L had check engine light
I have a 2002 dodge ram 1500 5.9L had check engine light come on went to auto zone and they said I had a mis fire on cylinder #5 did tune up 2 weeks before check engine light came on also noticed that… read more
Chris (aka- Moose)
Chris (aka- Moose)
Vocational, Technical or Trade School
49,754 satisfied customers
VEHICLE 2005 DODGE RAM 1500 WITH 4.7, PROBLEM # XXXXX CYL MISS FIRI
VEHICLE 2005 DODGE RAM 1500 WITH 4.7, PROBLEM # XXXXX CYL MISS FIRING, WHEN VEHICLE CAME TO US PRIOR SHOP REPLACED 4 INJECTOR, 2 COILS,INTAKE GASKET, WE CHECK SPARK,COMPRESSION 120 TO 130 CHECKED INJE… read more
sprinkles08
sprinkles08
Technician
High School or GED
17,759 satisfied customers
ram hemi: 2004 dodge ram 1500 hemi truck came in low oil pressure
2004 dodge ram 1500 hemi truck came in low oil pressure with one rod knocking,we laid new crank 1 rod and piston.engine is running on 4 cylinders 3,5,2,8 every other cyl in firing order we checked inj… read more
Dodge expert
Dodge expert
ASE MASTER TECH, REPAIR FACILITY OWNER
High School or GED
3,636 satisfied customers
I HAVE A 2006 DODGE RAM 1500 WITH A 3.7L ENGINE. I HAVE A ENGINE
I HAVE A 2006 DODGE RAM 1500 WITH A 3.7L ENGINE. I HAVE A ENGINE MISS ON #3 CYLINDER.wHAT IS THE FIRING ORDER ON THIS?, NOT SURE WHICH IS #3… read more
Amedee
Amedee
Automotive Consultant
Vocational, Technical or Trade Scho
19,176 satisfied customers
2000 Dodge Ram 1500: injectors, cam sensor, crank sensor..up assembly
I have a 2000 Dodge Ram 1500 3.9, we have changed plugs, plug wires, cap rotor, injectors, cam sensor, crank sensor & pick up assembly, but still miss fire & rough idle… read more
Eric
Eric
Retired
N/A
32,948 satisfied customers
2000 ram 1500: misfire..plugs wires and cap and rotor what else
i have a 2000 ram 1500 my scan tool tells me misfire number 7 i just change the plugs wires and cap and rotor what else could it be… read more
jeepmopar76
jeepmopar76
Master tech
Vocational, Technical or Trade Sc
1,108 satisfied customers
2002 ram 1500: miss fire..4cyl..changed plug light came..run great
i have a 2002 ram 1500 5.9 keep getting miss fire code foe #4cyl have done a complete tune up eng light came back on changed plug light came back on changed wire light came bak on every time truck wou… read more
CDJMasterTech
CDJMasterTech
Lead Automotive Technician
High School or GED
1,605 satisfied customers
2002 dodge: idle i unhooked the each coil and 2 4 6 8 cause it
my 2002 dodge is missing at idle i unhooked the each coil and 2 4 6 8 cause it to run ruffer but when i unhook 1 3 5 7 there is no change and i had them all 4 unhooked and there is no change… read more
brownjeff
brownjeff
Associate Degree
13,873 satisfied customers
1999 Dodge Ram 1500: I purchased the van used 2 years ago
I have a 1999 Dodge Ram 1500 Conversion Van. I purchased the van used 2 years ago. I have a recurring problem. I will get it tuned up and, over a period of 3 months will run progressively worse until … read more
Tom
Tom
Associate Professor, Auto Technology
Bachelor's Degree
353 satisfied customers
dodge ram 1500: 5.7l hemi..bad miss or maulfunction..comming
have a dodge ram 1500, 5.7l hemi. Had the engine start a bad miss or maulfunction last week comming home. limped the truck home and attached my sensor to it. Said that fuel injector 3 and 6 are open. … read more
garrtim
garrtim
SERVICE MANAGER
2,262 satisfied customers
2005 Dodge Ram 1500: v8..check engine light has come..spark plugs
I have a 2005 Dodge Ram 1500, 4.7L V8 FI engine. The check engine light has come on with a trouble code of PO 307 (cylinder 7 misfire). I already changed the spark plugs and ignition coil for cylinder… read more
brownjeff
brownjeff
Associate Degree
13,873 satisfied customers
1996 dodge ram 1500 4x4: cylinder 7 has 160.but truck still only runs
i have a 1996 dodge ram 1500 4x4 .i have two dead cylinder on the same side.compression is 150 cylinder 1 and cylinder 7 has 160.but truck still only runs on 6 cylinder.Fire is good,and the base is fu… read more
brownjeff
brownjeff
Associate Degree
13,873 satisfied customers
1997 ram 1500: 5.9l..idle and is reading a 4th cylinder miss fire
just bought a 1997 ram 1500 5.9l today and it has a stutter at idle and is reading a 4th cylinder miss fire and the engine light is on. any ideas as to what might be causing this.… read more
Mopar Certified
Mopar Certified
Dodge Technician
Vocational, Technical or Trade Scho
6,072 satisfied customers
2002 Dodge: Quad..with a 5.9L engine..layout of the spark plugs
I have a 2002 Dodge 1500 Quad, with a 5.9L engine, what is the firinf order and how is the layout of the spark plugs?… read more
b5demon
b5demon
Automotive Technician
Vocational, Technical or Trade Scho
1,522 satisfied customers
99 Dodge Ram 1500: van..I have replaced cap, rotor and plug..mile
I have recently purchased a 99 Dodge Ram 1500 conversion van w/ 88,000 mi., runs good, but seems to have a rough idle at initial start-up. The van displayed error code 308, cylinder misfire #8, I trie… read more
Eric
Eric
Retired
N/A
32,948 satisfied customers
98 Dodge Ram 2500: V8..5 & 7 when idling..my check engine light..rotor
I have a 98 Dodge Ram 2500 P/U with a 360 V8 that has a miss on cyclenders 5 & 7 when idling and my check engine light is on and cant get an inspection. I have changed sparkplugs, rotor, distributor c… read more
marc C
marc C
Mechanic
Vocational, Technical or Trade Scho
6 satisfied customers
2001 ram truck 360 eng..cyl..injectors @motorvaced still misses
I have a 2001 ram truck 360 eng with #5 cyl miss changed plugs @wires checked injectors @motorvaced still misses at idle… read more
autodoc_2000
autodoc_2000
Automotive Technician/Asst Service Manag
Vocational, Technical or Trade Scho
5 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