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Unread 09-21-2013, 04:57 PM   #1
Maine1994ZJ
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Timing jumps all over the place. '88 YJ

Tried to set the timing in my '88 258 YJ. the timing mark was jumping all over the place.
Bad distributor or worn out timing chain?

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Unread 09-21-2013, 05:24 PM   #2
Old4X
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Originally Posted by Maine1994ZJ View Post
Tried to set the timing in my '88 258 YJ. the timing mark was jumping all over the place.
Bad distributor or worn out timing chain?
Yes
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Unread 09-21-2013, 05:44 PM   #3
dancytron
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Have you done the Nutter bypass yet? If not, it could be the computer going crazy from a bad sensor or otherwise. Mine did that before I did the Nutter bypass, I suspect from a bad knock sensor.
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Unread 09-21-2013, 06:58 PM   #4
Maine1994ZJ
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Originally Posted by dancytron View Post
Have you done the Nutter bypass yet? If not, it could be the computer going crazy from a bad sensor or otherwise. Mine did that before I did the Nutter bypass, I suspect from a bad knock sensor.
I'll investigate that. Thanks
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Unread 09-21-2013, 07:06 PM   #5
Mean Max
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Timing chain.

Max
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Unread 09-22-2013, 06:44 AM   #6
WDNewman
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Timing chain.

Max
Ditto.

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Unread 09-22-2013, 10:54 AM   #7
Maine1994ZJ
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Thanks all!! I'm going out do do the Nutter bypass right now.... Because I have all the stuff I need to do it so, it's free.

If the timing mark is still jumping all over the place then I'll investigate the timing chain.
Really hope it's not the timing chain.... this sucker only has 120K miles on it..

I'm guessing the ported vacuum on a weber is still by the choke on the valve cover side?
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Unread 09-22-2013, 01:05 PM   #8
Maine1994ZJ
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So, I just finished the Nutter Bypass.
What a difference!!!!
No jumping timing mark, it runs WAY smoother than it did! It still sputters a little at idle, however.
I can't believe the power difference, except 4th gear which is pretty boggy, and 5th gear which just causes serious detonation and loses speed.
Would this be a vacuum leak, or do I need to Team Rush it, or both?
Or possibly some other gremlin I'm not aware of?
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