Idle-Timing issue

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Aug 28, 2014 | 09:34 PM

#16

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

Likes: 1,578

From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by Cherokeekid4x4

The whole reason for this question was because when I did set it I left it a tad before hitting cylinder one. Maybe making it a tad retarded and causing a long start/choppy idle. Also I was told when you drop the rotor back in it shifts a little. So I left it ahead so when I dropped it down it would face cylinder one. I simply just wanna know if it would still run if it was off by even a little bit. I know how to set the timing, I understand where it should be pointing.

It will run, but poorly. Gotta be right on.

Aug 28, 2014 | 09:58 PM

#17

DFlintstone

CF Veteran

Joined: Aug 2011

Posts: 10,489

Likes: 24

From: Nor-Cal Coast

Year: 90,84

Model: Cherokee

Engine: 4.0,2.5

Quote:

Originally Posted by Cherokeekid4x4

I know how to set the timing, I understand where it should be pointing.

Good, so you got it. You start with it around 4:00, so as it rotates coming down it lands at around 5:00. These puter controlled are different then vacuum advanced. The rotor tip needs to be almost too far ahead, leaving, a tad past, so when the puter advances the spark it can still reach the electrode. Not pointed right at, or at all behind #1.

Cruiser can correct me if I'm backwards, again!

Aug 28, 2014 | 10:00 PM

#18

Cherokeekid4x4

Thread Starter

CF Veteran

Joined: Feb 2012

Posts: 2,652

Likes: 2

From: Kansas

Year: 1994

Model: Cherokee

Engine: 190-hp, 4.0-liter I-6

Quote:

Originally Posted by DFlintstone

Good, so you got it. You start with it around 4:00, so as it rotates coming down it lands at around 5:00. These puter controlled are different then vacuum advanced. The rotor tip needs to be almost too far ahead, leaving, a tad past, so when the puter advances the spark it can still reach the electrode. Not pointed right at, or at all behind #1. Cruiser can correct me if I'm backwards, again!

Gotcha, thanks!