Let's Trouble Shoot this 360! - Page 2 - JeepForum.com
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post #16 of 136 Old 08-09-2019, 11:50 AM
Fourtrail
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you want to be before TDC, not past. Those look very fuel fouled like one would expect if the timing is that late and not much of the fuel is getting burnt.

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post #17 of 136 Old 08-09-2019, 12:02 PM Thread Starter
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you want to be before TDC, not past. Those look very fuel fouled like one would expect if the timing is that late and not much of the fuel is getting burnt.
Ok so that makes alot of sense. My timing cover reads TDC at the very top so your'e saying I need to work it clockwise further past that where I basically see no degree readings?

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post #18 of 136 Old 08-09-2019, 12:31 PM
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The AMC V-8 timing marks are kind of deceiving... The A is not for after TDC, it is for Advanced. You want to be midway between the 5 and 10 marks. So about where you are now.



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post #19 of 136 Old 08-09-2019, 12:43 PM Thread Starter
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The AMC V-8 timing marks are kind of deceiving... The A is not for after TDC, it is for Advanced. You want to be midway between the 5 and 10 marks. So about where you are now.


Ok thanks for clarifying that. I'll leave it where it's at then. I didn't have time to to drive the jeep over lunch so I dont know if that will fix all of my issues yet or not. I'll keep you posted.

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post #20 of 136 Old 08-09-2019, 01:31 PM
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The AMC 360 likes more initial advance than the 258. IIRC, the TSM states 10-11 degrees advanced, and up to 16 degrees in high altitude.

Always check timing with the vac advance hose disconnected from the distributor and plugged. It also sounds like you have the vac advance connected to ported vacuum. Your engine will be much happier on manifold vacuum.

Those plugs show the pig-rich air/fuel mix I'd expect from an inoperative choke.

Matt
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post #21 of 136 Old 08-09-2019, 06:10 PM
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HI, In one post here you say you still don't have the choke hooked up to power?? unless you unscrewed the screws and turned the choke spring off they its still choking it..
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post #22 of 136 Old 08-12-2019, 05:34 AM Thread Starter
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HI, In one post here you say you still don't have the choke hooked up to power?? unless you unscrewed the screws and turned the choke spring off they its still choking it..
The choke spring was turned all of the way off. As of now I have the choke properly wired up and choke springs adjusted back to the proper position. Still not getting cylinders 1 & 2 to fire off right now so next step is changing spark plugs. Not sure what else to do just yet.

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post #23 of 136 Old 08-12-2019, 06:21 AM
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So, are you saying the plugs in cylinders 3-8 look normal, and only 1&2 are fouled?

Matt


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post #24 of 136 Old 08-12-2019, 06:43 AM Thread Starter
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So, are you saying the plugs in cylinders 3-8 look normal, and only 1&2 are fouled?

Matt
I have not removed 3-8....yet. I based my findings off of a heat test. I drove the Jeep down the street and back and shut it off then immediately took a rag with water and dripped it on to each cylinder exhaust. 3-8 steamed the water......1 & 2 did not.

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post #25 of 136 Old 08-12-2019, 07:17 AM
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Originally Posted by garet.friedrich View Post
I have not removed 3-8....yet. I based my findings off of a heat test. I drove the Jeep down the street and back and shut it off then immediately took a rag with water and dripped it on to each cylinder exhaust. 3-8 steamed the water......1 & 2 did not.
I'm not sure you can draw too many conclusions from that test. I'd visually check all the plugs. My bet is they are all fuel fouled to some degree.

You could also hook your timing light up to each spark plug wire with the engine running. If the timing light flashes, you are getting spark. This test won't tell how strong the spark is, however.

If you do find that only a few cylinders aren't firing, it could either be the plugs, plug wires, or an ignition problem.

Keep us informed.

Matt
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post #26 of 136 Old 08-12-2019, 12:13 PM Thread Starter
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Cylinder 7 spark plug is stripped Going to try and tap and helicoil it tonight.... not happy about it.

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post #27 of 136 Old 08-12-2019, 01:29 PM
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Well, that sucks. How'd the other plugs look?

Matt


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post #28 of 136 Old 08-12-2019, 02:18 PM Thread Starter
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Well, that sucks. How'd the other plugs look?

Matt
Pretty darn filthy. I think that was definitely a major issue.

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post #29 of 136 Old 08-12-2019, 02:45 PM
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Did you check if #7 was firing? While the stripped plug certainly needs to be addressed, it probably wasn't preventing the plug from firing if the plug, plug wire, and ignition are OK.

From everything we know so far, I'm betting your problem is a pig rich air/fuel mixture, perhaps combined with a few bad, or weak firing plugs.

If it were mine, I'd replace all the spark plugs and plug wires. A new rotor and cap on your distributor wouldn't hurt either. Once we know all the plugs have a strong spark, then we can address getting the carb tuned correctly.

Matt


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post #30 of 136 Old 08-12-2019, 02:51 PM Thread Starter
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Originally Posted by Matt1981CJ7 View Post
Did you check if #7 was firing? While the stripped plug certainly needs to be addressed, it probably wasn't preventing the plug from firing if the plug, plug wire, and ignition are OK.

From everything we know so far, I'm betting your problem is a pig rich air/fuel mixture, perhaps combined with a few bad, or weak firing plugs.

If it were mine, I'd replace all the spark plugs and plug wires. A new rotor and cap on your distributor wouldn't hurt either. Once we know all the plugs have a strong spark, then we can address getting the carb tuned correctly.

Matt
It wasn't hot so I didn't think it was firing. I'll be replacing all of the plugs. Wires and distributor are all brand new yet...

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