My first Jeep, doesn't turn on. - JeepForum.com

Reply
 
LinkBack Thread Tools
post #1 of 18 Old 05-02-2013, 07:28 AM Thread Starter
Cisco123
Registered User
1989 YJ Wrangler 
 
Join Date: May 2013
Location: Gallup
Posts: 10
My first Jeep, doesn't turn on.

Fuel pump sounds like it works, just put in a new starter and starter relay so now it actually turns the engine, BUT it doesnt actually turn on. What could be the problem??? It is got a TBI with a new injector but i dont smell or see any fuel squirting out, is this normal??? Also, what are the 2 relays under the hood next to the Battery for?

Im new to this site and working on and owning a Jeep. Any help is appreciated.

Cisco123 is offline  
Sponsored Links
Advertisement
 
post #2 of 18 Old 05-02-2013, 08:04 AM
EABiker
Registered User
1989 YJ Wrangler 
 
Join Date: Dec 2004
Location: Frederick, MD
Posts: 1,720
Pour a small amount of fuel down the throttle body, then see if it will start and run briefly. If it does, you have a fuel problem, if not; no spark.
EABiker is offline  
post #3 of 18 Old 05-02-2013, 08:04 AM
jeff_in_rc
Registered User
2004 TJ Wrangler 
 
Join Date: Apr 2012
Location: Ridgecrest
Posts: 813
When you say it doesn't turn on do you mean it won't try to start, that the starter won't spin the motor over or the starter spins the motor but it won't start? Need more info.
Also, which motor do you have and what tranny do you have, all helpful info for us to help you.

And welcome to the forum!

2004 Jeep Wrangler Rubicon
Member of the Gear Grinders 4WD Club
jeff_in_rc is offline  
post #4 of 18 Old 05-02-2013, 05:23 PM
NicksYJ
Registered User
1993 YJ Wrangler 
 
Join Date: Dec 2010
Location: gahanna
Posts: 47
Hello! First off, When Diagnosing a no start condition there is two basic types of no start conditions. The first being (No-Crank/No Start) which basically means when you get in the vehicle turn the key nothing happens or atleast the motor doesn't turn over or start cranking. This can be divided into 2 sub categories which is A) No power to vehichle where the dash does not light up and nothing else comes on or B) where the dash gets power the PCM gets power but the engine doesnt crank.
The second type of no start is (Cranking/No Start) which means the vehicle cranks over and tries to start but actually wont firing.

To help you understand the Diag process that goes behind figuring either of these conditions out you need to understand an engine needs three things to run
1) Compression - Mechanical
2) Spark - Which is mostly electrical but has some Mechanical elements to it especially in our motors
3) Fuel/Air - Which again, is mostly electrical but there is Mechanical elements that pertain to this system.

Let us know which condition your Jeep presents so we can help you diagnose your issue!
and always start with the easy things I.E. Battery, Fuel Level, Clogged Air Filter, Starter etc.
NicksYJ is offline  
post #5 of 18 Old 05-02-2013, 06:31 PM Thread Starter
Cisco123
Registered User
1989 YJ Wrangler 
 
Join Date: May 2013
Location: Gallup
Posts: 10
thanks EAbiker, ill try that.
Cisco123 is offline  
post #6 of 18 Old 05-02-2013, 06:37 PM Thread Starter
Cisco123
Registered User
1989 YJ Wrangler 
 
Join Date: May 2013
Location: Gallup
Posts: 10
NichsYJ, i did replace the starter and starter relay, the engine does crank when i turn the key but thats all it does, the engine doesnt actually turn on. Ill try to get the remaining information such as transmission type etc as soon as possible. This is the first Jeep ive worked on.
Cisco123 is offline  
post #7 of 18 Old 05-02-2013, 06:39 PM Thread Starter
Cisco123
Registered User
1989 YJ Wrangler 
 
Join Date: May 2013
Location: Gallup
Posts: 10
My last post also applies to jeff in rc
Cisco123 is offline  
post #8 of 18 Old 05-06-2013, 09:41 AM Thread Starter
Cisco123
Registered User
1989 YJ Wrangler 
 
Join Date: May 2013
Location: Gallup
Posts: 10
ok so I found that there is no spark, so i also replaced the ignition coil and the module it sits in ( it is a domestic coil(Square), as opposed to import (Cylindrical)). After i replaced these to items i still have no spark coming out of the coil. what do i do now???
Cisco123 is offline  
post #9 of 18 Old 05-06-2013, 11:07 AM
EABiker
Registered User
1989 YJ Wrangler 
 
Join Date: Dec 2004
Location: Frederick, MD
Posts: 1,720
The CPS, or Crank Position Sensor is what the ECM uses to determine when to fire the plugs, and is known to be failure prone. It is located at the rear of the engine on the bellhousing. Give that a shot.
EABiker is offline  
post #10 of 18 Old 05-06-2013, 11:36 AM Thread Starter
Cisco123
Registered User
1989 YJ Wrangler 
 
Join Date: May 2013
Location: Gallup
Posts: 10
is this a sensor that i clean, adjust or should i just replace it?
Cisco123 is offline  
post #11 of 18 Old 05-06-2013, 11:40 AM
jeff_in_rc
Registered User
2004 TJ Wrangler 
 
Join Date: Apr 2012
Location: Ridgecrest
Posts: 813
Since it is electric I would replace it. Nothing to clean.

2004 Jeep Wrangler Rubicon
Member of the Gear Grinders 4WD Club
jeff_in_rc is offline  
post #12 of 18 Old 05-06-2013, 11:48 AM Thread Starter
Cisco123
Registered User
1989 YJ Wrangler 
 
Join Date: May 2013
Location: Gallup
Posts: 10
ok will do, thanks
Cisco123 is offline  
post #13 of 18 Old 05-13-2013, 08:58 AM Thread Starter
Cisco123
Registered User
1989 YJ Wrangler 
 
Join Date: May 2013
Location: Gallup
Posts: 10
EAbiker and jeff in rc, I replaced the CPS and it started right up!!! running smoothly, awesome thanks guys!!!!
Cisco123 is offline  
post #14 of 18 Old 05-13-2013, 09:35 AM
jeff_in_rc
Registered User
2004 TJ Wrangler 
 
Join Date: Apr 2012
Location: Ridgecrest
Posts: 813
Good news there Cisco123!! Thanks for the follow up message, a lot of people don't.

2004 Jeep Wrangler Rubicon
Member of the Gear Grinders 4WD Club
jeff_in_rc is offline  
post #15 of 18 Old 05-13-2013, 09:54 AM
EABiker
Registered User
1989 YJ Wrangler 
 
Join Date: Dec 2004
Location: Frederick, MD
Posts: 1,720
Happy Jeepin! Also glad you let us know how it turned out; now others can learn how to get their rig running by reading your thread!
EABiker is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome