Jeep Wrangler Forum - Reply to Topic
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum > 91 jeep yj no start

Join Wrangler Forum Today

Thread: 91 jeep yj no start Reply to Thread
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:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:


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)
02-27-2012 09:20 PM
mikeaju im gonna do that tomoro i guess i also heard the ignition coil might be bad so its not getting hot enough spark does this sound right?
02-27-2012 09:08 PM
AZ WRANGLER Did you check your timing? Sounds like it fixed Ricks problem...
02-27-2012 07:38 PM
mikeaju my yj still wont start guys after i replaced cps please help, anyone...
02-26-2012 07:29 PM
mikeaju well mine wasnt cam sensor but i found out how to pull codes and pulled a number 11 which is crank sesnor i belive yay me.
02-25-2012 10:06 PM
rebelBullDawg325 glad you got it fixed. it was a PITA when i had this same problem.
02-25-2012 09:36 PM
mikeaju awesome man thanks alot so did you have to take the dist right out then to change the cam sensor. ive taken one dist out before and ya its not a fun job glad she got running for you that great. I ordered my cam sensor today im gettin it tomoro and well see ill keep you informed again thanks alot.
02-25-2012 04:22 PM
Rick1805 Ok IT'S RUNNING.

The timing was off. The cam sensor was bad had to pull the distributor out to replace it and when I put it back in must of been off a tooth or more that started in the pull it out damn I'm 180 off and try again well I was only really 90 off so once I got everything reset top dead #1 both valves closed timing mark correct and she fired....

My advice take a lot of photos so you can be sure where everything was and how it sat
02-24-2012 10:43 PM
mikeaju Let me know how it goes I kno u can get computers from junk yards or ebay for not too bad a price. And why do you have to set timing did it really jump off time you think.
02-24-2012 09:18 PM
Rick1805 Yes it's a pain Need to set the timing on mine and hopefully it will start
Yours might be the same problem as mine after replacing the cam sensor it seemed to want to start but is off time
Going to try again tomorrow

Crank sensor for me did nothing try cam sensor first pain in the butt to replace as you have to take the distributor apart
Hopefully tomorrow will have better news because my next throw money at it is replace the computer or better yet scrap it and put new motor in it
02-24-2012 08:03 PM
mikeaju I have this same problem right now spark and fuel but no start its annoying as hell, what do i do. I was thinkin crank senser mine is a 92 does mine have a cam senser too. 4.0 ltr
02-22-2012 05:18 PM
rebelBullDawg325 thats why i replaced the whole distributor. no one had the sensor in stock, but advance did have a distributor with the sensor installed in stock, i needed it asap, could not wait so had to pay extra, but o-well
02-22-2012 04:51 PM
Originally Posted by 2xs View Post
Fuel at the plugs?

Is it flooding?

You try checking the injector @ harness with a noid light?

Cam sensor is in the distributor.....
yes fuel at the plugs when i turn the motor over with the plugs out i get a mist of fuel out of the plug holes

dont have a noid light and yes the cam sensor in the distributor and seems no one has it in stock you would think one of jeeps used in everything motor no one has parts in stock for it not even jeep dealer
02-22-2012 03:09 PM
2xs Fuel at the plugs?

Is it flooding?

You try checking the injector @ harness with a noid light?

Cam sensor is in the distributor.....
02-22-2012 12:52 PM
Rick1805 ok update....

replaced crank sensor no help still no start....
I have spark and fuel at the plugs my next thow money at it thing is replace the
cam sensor its on order I tried to ohm it and got nothing out of it but as the dodge place and the other parts places if i have spark then that should be working

So I am at a loss if anyone has any ideas please put them forward my next item is the computer ..............
02-21-2012 09:39 PM
1fast lorinser If it was a fuel problem you can just spray some starting fluid down the throttle body and it should run for a few seconds or so just to make sure its not a fuel issue.
02-21-2012 05:29 PM
VeroJoe Where is this sensor on a 92 - 4 banger???
02-21-2012 05:12 PM
Originally Posted by Rick1805 View Post
....Fuel at the rail....
Just because you have fuel at the rail doesnt mean your injectors are getting a signal.

Got a noid light? check it.

Cam sensor if no signal.
02-21-2012 04:47 PM
Garyk The crank position sensor is a good bet. If its defective the timing will be way off...
02-21-2012 02:53 PM
Rick1805 The problem started Monday morning drove around all weekend no problems (normal driving ). There seems to be good pressure on the rail but don't have a gauge going to try the sensor and see what happens . She does sound like she wants to start sounds like it really needs. A tune up but did that new cap rotor wires plugs

Did swap the relays around last night
02-21-2012 02:16 PM
rebelBullDawg325 have you checked actual fuel pressure? or just that there is fuel in the rail? could have low pressure, or could be clogged injectors?

but i had almost the same problem. i replaced the distributor and the cam sensor inside it ( you can replace separate as well) and mine fired right up. BUT i only had intermittent spark.

when did this problem start?

also, open the fuse box and swap the ASO, fuel pump, and starter relays around and see if anything changes
02-21-2012 09:59 AM
Rick1805 It turns over just fine but will not run........ If you crank it for a min or so you get that feeling that it wants to run but nothing we have all heard that sound just that little more and she go but nothing

The thing I'm stuck on is that old thing you have fuel YES you have spark YES then should run

I ordered the crank sensor it has 150,000 miles on the motor the cam sensor looks ok but never know
02-21-2012 09:18 AM
rebelBullDawg325 Does it turn over just won't fire and run or does it not even turn over
02-21-2012 08:14 AM
Rick1805 Yes constant spark and fuel. But no run. The other strange thing that happened about a week before the shift light that nev worked started to work for about a half a day and stopped working again ... Guessing that the injectors are not firing but I would think I would get something from the starting fluid
02-20-2012 10:59 PM
rebelBullDawg325 you getting constant spark on all plugs? i had a similar system but would only get random sparking. ended up cam position sensor, inside distributor
02-20-2012 09:36 PM
jfbilbro's mounted on the bell housing on the drivers side toward the front....there's a way to test it before replacing if you are familiar with an ohm meter and have one at your disposal.....let me know, and i'll give you the step by step test procedure...
02-20-2012 09:31 PM
Rick1805 4.0
02-20-2012 09:31 PM
jfbilbro which motor you got?....2.5 or 4.0?....makes a difference in location
02-20-2012 08:52 PM
Rick1805 Ok so that would stop from starting even with starting fluid ?
Of course it would have to be a special order part.
Also if I may ask. Where is the part located? Driver side? Pass side? Of the flywheel
02-20-2012 08:38 PM
jfbilbro x2 on the crank sensor...
02-20-2012 08:24 PM
1fast lorinser check your cam position sensor or crank position sensor. sensors like these on wranglers tend to always fail.
This thread has more than 30 replies. Click here to review the whole thread.

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 07:59 AM.

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