Jeep Wrangler Forum - Reply to Topic
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ General Discussion Forum > Jeep will crank but won't start...

Join Wrangler Forum Today


Thread: Jeep will crank but won't start... Reply to Thread
Title:
  
Message:
Post Icons
You may choose an icon for your message from the following list:
 

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

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.



Additional Options
Miscellaneous Options

Topic Review (Newest First)
07-25-2011 10:14 PM
Knurlag I had to drill a gap in the lip of the firewall to get the crank position sensor to back out. I replaced it with a, new, high quality, lifetime warranted one and now it runs like a top. Thank you guys for all your help. I do appreciate it.
07-25-2011 06:45 PM
Knurlag How are you supposed to get the crank position sensor out with the firewall in the way?
07-25-2011 07:45 AM
cheap_jeep and the cam position sensor is in the distributor.
07-25-2011 05:22 AM
rda616
Quote:
Originally Posted by Knurlag
I'm thinking it's the coil. I have a hot connection but...yeah. Spark plugs are ACDelcos. Firing order, gap, and wires are all factory specs. I can't find the camshaft/crankshaft sensors anywhere. Going to take the coil to autozone tomorrow.
The crankshaft position sensor is at the back of the engine and goes thru the bell housing it's on the drivers side at the top with two bolts that hold it. It reads off the flywheel.
07-24-2011 08:30 PM
Knurlag I'm thinking it's the coil. I have a hot connection but...yeah. Spark plugs are ACDelcos. Firing order, gap, and wires are all factory specs. I can't find the camshaft/crankshaft sensors anywhere. Going to take the coil to autozone tomorrow.
07-24-2011 04:21 PM
jp'rs_peep'rs So far you've replaced:
Plugs - what kind?
Cap, rotor - OEM?
Wires - did you get you firing order pooched?
CSPS - what brand?
did you replace the battery?
Checking wires visually isn't going to work... DVM is essential. ..
Have you physically inspected and tested/ cleansed your connections to ground?
Have you replaced you battery cables?
Have you done the camshaft positioning sensor ( if applicable)?
C.
07-24-2011 11:33 AM
rda616
Quote:
Originally Posted by Knurlag
Ok, I checked all wires and connections in all fuse boxes (nothing), sprayed a couple squirts of ether in injectors while cranking (nothing), changed spark plugs and wires (nothing), fuel pump running and filter checked (no problem), and done for the day. Do you think it is the ignition coil or timing?
If it didn't fire on ether then you have a spark issue. Take one of the old plugs, plug it in to the #1 plug wire ground the plug by holding it to the block and have someone turn the key to see if it throws a spark! If not check the hot wire to the coil with a multi meter. If you have power then take the coil to Autozone and have them check it. If not then it's likely the crankshaft position sensor!
07-24-2011 10:24 AM
Knurlag Ok, I checked all wires and connections in all fuse boxes (nothing), sprayed a couple squirts of ether in injectors while cranking (nothing), changed spark plugs and wires (nothing), fuel pump running and filter checked (no problem), and done for the day. Do you think it is the ignition coil or timing?
07-24-2011 07:02 AM
Knurlag Thanks Rda616
07-24-2011 06:30 AM
rda616
Quote:
Originally Posted by Knurlag
Ok, I am also new to the forum but I am hoping that you guys can help. I have the same issue as the start of the thread. Wrangler will crank but not start, no smoke or instrument possession, so I am hoping that it is just the fuel pump. Now I might sound ignorant but I am new to owning a Jeep (3 days). So, this being said, where is the fuel pump?
Fuel pump is in the gas tank! Check the fuel pressure before replacing the pump. Check all the fuses and relays in the pdc under the hood on the passenger side fender. If the engine light is on check codes with a obd2 scanner. Check your ground wires for corrosion, or broken wires. The other thing that commonly fails is the carankshaft position sensor.
07-24-2011 02:40 AM
Knurlag Ok, I am also new to the forum but I am hoping that you guys can help. I have the same issue as the start of the thread. Wrangler will crank but not start, no smoke or instrument possession, so I am hoping that it is just the fuel pump. Now I might sound ignorant but I am new to owning a Jeep (3 days). So, this being said, where is the fuel pump?
03-12-2010 09:03 AM
rrich Not sure if yours has it - a fuse/relay box just in front of the battery?

If so, lifting the lid exposes the fuses and relays. Look at the sides - there are latches to take the upper part off. Unlatch them and you can get to the bottom side of the sockets.
Look closely for a burned or bad connection.
03-12-2010 05:14 AM
MOz Any codes?
03-12-2010 12:00 AM
thebake where is the igntion control modual at? i have a 91 2.4 n i cant find it
02-17-2010 05:36 PM
rrich It should be pretty simple.
Get it to smoke again. Use a strong pencil beam flashlight to find the source of the smoke.

I suspect it's where the ground cable (-) attaches to the engine block. The bolt is loose or the crimp connector has gone bad.

Make it smoke a little - smoke is generated by heat - something's getting real hot and burnng the oil/dirt off. Feel around, find the hot spot.
02-17-2010 11:52 AM
CJ2WRANGLER Have you checked the fuel pump? Sound like the exact same thing mine did, I had a buddy check the fuel pressure that I was pushing and it was only like 0.5 lbs. I took everything off of the top of the throttle body just to pour about a tablespoon of fuel into the throttle body and it fired right up. Hope this helps
02-17-2010 10:47 AM
T-BONE N BIXBY Anytime you're unsure to what the problem may be, it's best to get it to a mechanic. You can really waste money chasing down what "might" be wrong with it. Good luck dude!!!
02-17-2010 10:36 AM
Fweaky That sounds like the area the PCM or Powertrain Control Module is in. Its on the firewall above the battery. It is possible that is your problem but I don't know for sure.
02-17-2010 09:41 AM
jack32 Just an update on the situation.

Replaced the crankshaft position sensor and still a no go.

This problem is driving me crazy.
may take it to a shop if I can't get it going
02-15-2010 12:09 AM
jack32
Jeep will crank but won't start...

Hey guys, new here to the forum but I've got a problem.

Jeep Wrangler 1998 4 cyl.

I'll give you all the details I can recall

OK, so last week we got about a foot of snow here. I am on my way home and pull into the gravel drive to our barn where my jeep stays. I got stuck in a snow drift and couldn't get out. I had it in 4 low and was trying to go back and forth to get my jeep out. So I had it in reverse and the jeep stated to shutter and shake as I was trying to get out. I gave it some more gas and then the engine stuttered and then died. In the end had to tow it to the barn, where it now sits. The engine will crank, but will not start.

Here's what I've done so far.
replaced:
spark plugs, spark plug wires, rotor, distributor cap, ignition module, had battery tested (came back good).

Checked:
all fuses good (under the glove box and under the hood), took of air cleaner and tubes sprayed stater fluid into TB but got nothing, checked ignition module with voltmeter and came back 0 volts. (check old one and got a very low voltage 0.5 volts DC), was not getting any voltage at the distributor cap on new or old one.

This leads me to believe that there is an electrical problem.

One more thing that just happened today, once all the new parts were installed, tried to start it and but it didn't fire. My assistant clams that he saw a small puff of smoke come from the corner closest to the outside of the jeep, near the battery; from the fuse box under the hood. (I did not see it, but after a few more attempts to start the jeep I smelled that burnt electrical component smell at the location where the smoke may have come from.)


So, I am stuck and don't know what to do now. I really miss driving my jeep any other car is just not the same.

any and all assistance will be greatly appreciated.

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


All times are GMT -5. The time now is 06:12 PM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC