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Unread 01-08-2015, 03:53 PM   #1
Maestro93XJ
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Distributor install

I recently installed a new distributor in my 4.0 because the old one was making a squealing sound. The squeal is gone but I think it might be off a tooth. It runs way smoother but it feels underpowered and when I start it, it doesn't start on the 1st try like it used to. It makes a sound that I can only describe as a "cough" on the 1st attempt to start, but fires right away on the 2nd. The distributor only has 13 teeth, so 1 tooth would be about 27 degrees off. My question is, could it be off by 27 degrees and still run really smooth? Or have I just uncovered something else? I figured I can try and move it 1 tooth and see, or see if anyone's already dealt with this. I thought I would ask 1st.

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Unread 01-09-2015, 01:26 AM   #2
JeepJohn92
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When you installed it did you dial it back so the timing was placed at piston #1 with the engine timed at TDC?
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Unread 01-09-2015, 08:26 AM   #3
Maestro93XJ
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When I took out the old distributor, I made sure to see where the rotor pointed and tried to put it back in the same position. I also tried to pay attention to where it was pointing as I rotated it out because I knew it would turn because of the gear. I attempted to start the installation by putting the rotor in the position it was after lifting the old one out, so when it rotated it would be in the correct position. I did not go through the procedure of putting the #1 cylinder at top dead center since I knew where it was positioned when I removed it. I thought I was saving time by doing it my way. But a second removal/install will certainly disprove that thought. My confusion is mostly because it runs smoother than the old one did, even if it's off by a tooth. I figured it would run terrible being off by 27-ish degrees.
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Unread 01-09-2015, 08:27 AM   #4
Maestro93XJ
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So... Long answer short: no.
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Unread 01-09-2015, 08:30 AM   #5
1stockjeep
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27 degrees of timing is a lot to be off, it would run terrible if of a tooth, did you hook up a good timing light and set the timing?
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Unread 01-09-2015, 08:58 AM   #6
Maestro93XJ
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I did not. It was my understanding that the timing is not adjustable on the 4.0, at least the way most engines are since the distributor only goes in one way. Is there a way to adjust the timing?
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Unread 01-09-2015, 09:00 AM   #7
Maestro93XJ
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I don't have a timing light but I considered getting one specifically because of my current issue.
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Unread 01-09-2015, 04:58 PM   #8
cruiser54
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Thanks for your post.

We’re here to help, but you must understand that all Jeeps are not the same.
In order for us to give you more accurate advice and help, we must know the following, as applicable, along with detailed information as to the symptoms/problems etc:

Year
Model
Engine
Transmission
Transfer case

I'm guessing here:

http://www.angelfire.com/my/fan/dist_index.html
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http://www.cherokeeforum.com/g/album/1725214
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Unread 01-09-2015, 05:02 PM   #9
JeepJohn92
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cruiser54 I was about to suggest you distributor write up, good timing.
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Unread 01-09-2015, 06:36 PM   #10
Maestro93XJ
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1993 XJ sport 2 door, 4.0, AX-15, np231, 3.07 gears, 235/75r15 tires, 150k... Thanks for the link... So judging by the write-up there is no adjusting the timing, it's just a matter of getting the distributor where it goes.
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Unread 01-09-2015, 06:51 PM   #11
cruiser54
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Correct.
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Originally Posted by chris87xj View Post
If you own a Renix Jeep, you'll want to check this out. >

An index to over 25 write-ups can be found in Post #1.

Cruiser's Mostly Renix Tips
My Jeep Technical Photos

http://www.cherokeeforum.com/g/album/1725214
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Unread 01-09-2015, 09:04 PM   #12
Pcolt98
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A retarded engine can run really smooth. With today's computer controlled engines and spark, errors can be made up for to a certain extent. I would try to advance 1 tooth and see if all is better. You will know pretty quick if timing is way out of the window.

Years ago I had a engine that was way retarded and ran well, but there was no electronic ignition.
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Unread 01-09-2015, 09:12 PM   #13
cruiser54
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Quote:
Originally Posted by Pcolt98 View Post
A retarded engine can run really smooth. With today's computer controlled engines and spark, errors can be made up for to a certain extent. I would try to advance 1 tooth and see if all is better. You will know pretty quick if timing is way out of the window.

Years ago I had a engine that was way retarded and ran well, but there was no electronic ignition.
See post #10.
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Quote:
Originally Posted by chris87xj View Post
If you own a Renix Jeep, you'll want to check this out. >

An index to over 25 write-ups can be found in Post #1.

Cruiser's Mostly Renix Tips
My Jeep Technical Photos

http://www.cherokeeforum.com/g/album/1725214
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Unread 01-09-2015, 09:13 PM   #14
Maestro93XJ
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But if it were off by 27 degrees (1 tooth), wouldn't it trigger a code? Or check engine light? I just checked the codes & only 12 & 55... So just disconnected battery?
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Unread 01-09-2015, 09:15 PM   #15
cruiser54
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Quote:
Originally Posted by Maestro93XJ View Post
But if it were off by 27 degrees (1 tooth), wouldn't it trigger a code? Or check engine light? I just checked the codes & only 12 & 55... So just disconnected battery?
Just use the instructions and make sure it's indexed properly..........
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Quote:
Originally Posted by chris87xj View Post
If you own a Renix Jeep, you'll want to check this out. >

An index to over 25 write-ups can be found in Post #1.

Cruiser's Mostly Renix Tips
My Jeep Technical Photos

http://www.cherokeeforum.com/g/album/1725214
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