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Old 12-16-2016, 04:57 PM
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YJ questions

Hi Guys/Gals, new to the YJ forum. I have owned a CJ-7 (still runs around the farm, but far from road worthy), a 99 TJ, and sold my JKUS a couple of weeks ago. I went almost a whole week without a Jeep, whew.
I've been lurking here for the last month preparing for YJ ownership, and have already fixed my "no heat" and "door dragging" problems, Thanks!
Last Saturday I picked-up an 89 YJ w/ 5 speed, 125,000 miles and I am the 3rd owner. It lived in Cali until this past spring when the owner relocated to Indiana. He then sold it to a local guy who drove it this past summer. He's a young 'in and he and his girlfriend couldn't stand the ride.
I paid cash from the JK sale. I've been driving it almost a week and love it.
I'm going to leave this thread open because I'm sure to come back with several questions over the next several months.
I've also titled it fairly generically so anyone with a simple question can just come in with a quick question that the experts can answer quickly enough that wouldn't require a whole thread.
So, #1. If I start it and run a mile or two, no problems. But if I drive it to work (about 25 miles) it doesn't want to die when I turn it off. Spits and sputters for 3-5 seconds before dying. Any suggestions?
#2, there's a large hose coming from the firewall and going down (90* angle right off the firewall) to the bottom of the engine. Isn't connected to anything.
Anyone have any idea what that is?
Thanks in advance!
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Old 12-16-2016, 05:14 PM   #2
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The hose is probably the drain for the cowl intake for your heater and such. It just allows any water that gets into the cowl to drain down so it doesn't go all over your feet. Make sure it's clear of any debris!

As for the running after you switch the key off... I think there are a few possibilities. Is your engine carbed?

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Old 12-16-2016, 07:50 PM
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Yep, it's a 4.2, carbed. It starts up great, even yesterday morning at 7*.
It does stammer/hesitate when I get back on the gas after shifting, but only for a split second. Then it takes off.
That's good to hear on the hose. That had me a little worried.
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Old 12-16-2016, 09:22 PM   #4
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Quote:
Originally Posted by Instructor9 View Post
Yep, it's a 4.2, carbed. It starts up great, even yesterday morning at 7*.
It does stammer/hesitate when I get back on the gas after shifting, but only for a split second. Then it takes off.
That's good to hear on the hose. That had me a little worried.
A couple things it could be. Build up on your piston heads, your throttle plate not closing completely when it turns off, or idle too high.

Try higher octane fuel -adjust the idle speed - check of throttle plate is closing at engine turn off, it could be a missing/improperly routed vacuum hose.
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Old 12-17-2016, 11:17 AM   #5
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A couple things to check are timing and is the Jeep overheating.

Does it ever backfire? A burnt valve could cause the "running on".

Good Luck, L.M.
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Old 12-18-2016, 10:03 AM
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Thanks guys, some of your recommendations are a little over my head. I haven't worked on a carb much, and that's been over 25 years ago.
Honestly, I really want to learn about my YJ, can anyone recommend a good link/video on working in the carb? I know I could just google it, but I don't know who to trust, or maybe one of you guys know a good site.
I just filled it up Friday preparing for the weather crap, so I'll try a higher octane rating next time.
I may also add a bottle of Sea Foam (my father's recommendation).
But I can say, it doesn't seem to be running at a high idle. Going by sound only, It seems to be idling at about the right rpm's.
It doesn't backfire any, and runs quite the opposite of hot, lol.
Thanks for all of your help so far guys.
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Old 12-19-2016, 09:00 PM
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Thanks for your help so far guys. I ran a VIN search and it says mine came out with an auto tranny.
It's running a 5 speed now.
Any ideas which one by the pic?
If not, any suggestions on how to find out?
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Old 12-19-2016, 09:02 PM
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Passenger side.
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Old 12-19-2016, 09:32 PM
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I did find out it has a 231 transfer case.
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Old 12-21-2016, 01:04 PM   #10
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Passenger side.
I believe that's an AX-15. Your pic is showing the intermediate plate and no bolted together seam on the bottom edge.
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Old 12-21-2016, 01:30 PM   #11
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Sure looks like an AX-15.

Seafoam works great, when it is used correctly. You can actually hydrolock an engine with it, so be careful. I like to use a small vacuum line that is in a location where it can distribute the seafoam to all cylinders and I always shut it down an let sit for at least half an hour after I get about half a can in there. If you don't let it soak into the carbon deposits, it doesn't seem to work as well. If it smokes out your entire neighborhood, then you had a decent amount of carbon deposits and the seafoam got in there and did its job well. Others may have different methods, but this is what has always worked for me.

Best of luck!
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Old 12-21-2016, 09:15 PM
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Thanks guys.
Well, crap. I hadn't heard anything for a couple of days, and I was headed out this morning to run some errands. And was low on gas.
So, not really seeing any directions or mix ratios on the can, I dumped the can into my gas tank and then filled it up.
I ran some errands and then came home.
Should I do something?
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Old 12-22-2016, 08:05 AM   #13
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Originally Posted by Instructor9 View Post
Thanks guys.
Well, crap. I hadn't heard anything for a couple of days, and I was headed out this morning to run some errands. And was low on gas.
So, not really seeing any directions or mix ratios on the can, I dumped the can into my gas tank and then filled it up.
I ran some errands and then came home.
Should I do something?
It should be fine, but seafoam works best when you put it directly into the intake via a vacuum hose. Seafoam isn't as combustible as gas, so it will run a bit sluggish if you have a considerable amount in the tank. But it should clean up the combustion chambers a bit better that way.
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Old 12-22-2016, 08:24 AM
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Great, Thanks Matt.
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Old 01-06-2017, 03:13 PM
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Again, Thanks for all of the help so far. Next...
Could you possibly tell me what size lift is on my YJ just by pics?
It has 18" wheels/tires on it with an adapter, and I don't like them.
I've got a guy with a JK that wants to buy them. I'm thinking I want to go to 15 w/ 4" BS (something like the Crager soft 8's) and a 31 or 33" tire.
My local tire guy says (just by looking) he thinks 33's will work.
Thoughts?
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Small spring and body lift with 265/65-18 Duratracs w/ adapters.
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Old 01-06-2017, 04:16 PM   #16
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Post a pic of the whole Jeep from about waist lever on the side. Someone will have an idea of what you have.
Depending on your gearing, 31s will seem a bit peppier than 33s.

It looks like you might have lift shackles. What is the measurement between the bolts, center to center?

Good Luck, L.M.
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HEI distributor with computer and all related relays and wiring removed.
No back seat.
12K Badlands winch with dual batteries.
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Old 01-06-2017, 04:52 PM
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Thanks LM.
Here's a couple. I was running out of daylight.
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Old 01-06-2017, 05:37 PM
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And.
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Old 01-06-2017, 06:29 PM   #19
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Looks like you have a 1 inch shackle lift. I believe the stock shackles are 4 inches tall if I'm not mistaken.
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Old 01-07-2017, 03:19 PM   #20
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A 1" longer shackle produces a net lift of 1/2".

You state that you have a body lift and 18" tires. I wonder from the last pic (#18 post) if you have an actual spring lift.

Exactly how tall are your current tires? How much of a body lift do you have?
My BFG KO 31s are actually 29" tall and I have 3 1/2" between the top of the tire and the bottom of my flare. I have new stock height heavy duty springs and a 2" body lift.

Your tire guy thinks 33s will fit.
How do you plan to use your jeep? Just because something will fit doesn't mean it's the right thing for you personally. As a daily driver, you will be happier with 31s.

I think the 15" Cragers with 4" backspacing are a good choice. They aren't expensive and they look good. Make sure you order the center caps at the same time.

Good Luck, L.M.
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HEI distributor with computer and all related relays and wiring removed.
No back seat.
12K Badlands winch with dual batteries.
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Old 01-12-2017, 11:23 AM
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Quote:
Originally Posted by Luckymac View Post
A 1" longer shackle produces a net lift of 1/2".

You state that you have a body lift and 18" tires. I wonder from the last pic (#18 post) if you have an actual spring lift.

Exactly how tall are your current tires? How much of a body lift do you have?
My BFG KO 31s are actually 29" tall and I have 3 1/2" between the top of the tire and the bottom of my flare. I have new stock height heavy duty springs and a 2" body lift.

Your tire guy thinks 33s will fit.
How do you plan to use your jeep? Just because something will fit doesn't mean it's the right thing for you personally. As a daily driver, you will be happier with 31s.

I think the 15" Cragers with 4" backspacing are a good choice. They aren't expensive and they look good. Make sure you order the center caps at the same time.

Good Luck, L.M.
Thanks to everyone for trying to educate a newb. Especially LM, you've been very helpful in a few different threads of mine.
So, how can I tell if I have a spring lift?
My current tires are 265/65 R18. Measured (unscientificly, with a tape measure) at approximately 31 1/3".
The issue with 31's are, and this is a personal thing, I love tires that fill-up the fender well. I can't stand the site of big lift, small tires. Also want the most ground clearance I can get. I do a lot of hunting/fishing out in remote areas and just want a better chance of not getting hung-up.
Thanks for the heads-up on the center caps.
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Old 01-12-2017, 12:26 PM   #22
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When I answer questions that I don't feel totally qualified to answer, I usually try to provide a way for the person asking the question to come up with an answer that will work for them.

I agree with your statement that I too, don't like the look of large wheelwells and small tires. That said, on most Jeeps the outer edge of the tire extends out beyond the tub. During extreme flexing you need enough height for the body to clear the tires. If the tires were very narrow and stayed within the tub, you would have much less chance of tire/tub interference.

Most high volume tire stores will mount a pair of tires on whatever wheels they have so that you can see what they look like. If a Jeeper buddy of yours has a set of tires close in size that you are considering, perhaps he will let you mount them just to check fit.

What's more important than looks is how you plan to use the Jeep.
Sometimes even the tallest, most aggressive Jeep will get hung up. That's why we carry recovery gear when on the trail.

If you go to the main page of this forum and scroll down past the vendors, you will come to a state by state forum. Click on the Kentucky forum and you can start meeting other Jeepers in your area and get a feel of what works best in your area.
For instance, here in Colorado, we don't have a lot of mud. What we do have are abandoned roads (trails) to old mines and ghost towns. Some have precipitous drop offs. Many are above timberline.
I imagine in Western Kentucky, you have a lot of soft ground in heavily wooded areas. If you plan on getting into a hunting area, you probably don't want to be set up for rock crawling.

You can see what I mean. Only you can decide what will work for you. It seems like you have to find a balance between looks and function.

As far as determining how great a lift you have, if any, I can't tell from the pics. I think you must have some lift in order to fit the 18" tires. It doesn't look like you have a body lift. Do you have a transfer case drop or a slip yoke eliminator?
You might try cleaning off the top of the springs with a mild soap and water to see if there are any part numbers or other identifying marks.

Good Luck, L.M.
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HEI distributor with computer and all related relays and wiring removed.
No back seat.
12K Badlands winch with dual batteries.
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Old 01-13-2017, 06:57 PM
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Thanks LM, again, you've provided me with a lot of good information and some things to think about.
I'll talk to my guy and see if he'd be willing to mount the up for me to see without obligation.
I'm fairly familiar with the area around here, been hunting and fishing around here for about 35 years. I know 33x12.5's have always done me well.
I think I'll try 33's and see. I know that almost all 31" tires are close to 29 1/2" and I'm thinking those will look too small.
But, if there's any other advice to give, please feel free to keep it coming.

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