89 YJ Sahara 4.2 Engine missing parts - JeepForum.com
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Unread 05-07-2014, 08:21 PM   #1
Monohm
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1989 YJ Wrangler 
 
Join Date: Apr 2014
Location: Cartagena, Bolivar
Posts: 37
89 YJ Sahara 4.2 Engine missing parts

Hi, my name is Alberto, this is my first post here. Recently bought a Sahara Edition YJ 89. It has a 3 speed automatic transmission. I did a trip of about 700 Miles from the city that I bought it. At the beginning I was at 1700 meter over the sea level, went almost 3.000 meter over the sea level where I felt a total loss of power, even at full trothle it didn't raised more than 2.500 rpm. I'm at sea level right now... when going lower the engine was feeling too much powerful and now it seems to run like a dragster. The bad thing is that the fuel consumption is too high. During the trip the floor was getting really hot, under the rear seat on the right side the paint looks burned and the carpet a little melted, the RR wheel well is melted...

So after the trip I've been reading a lot about this engine and found that there are a lot of things that have been replaced and removed. I will like to have this engine working as it should and as stock as possible.

To start with, there are two hose connections under the air cleaner base, found those openings without hose or plugs, completely open to the atmosphere. Some Wires are hanging out, some vacuum hoses disconnected, don't know if the PCV valves are the right ones, the heater hoses are not in place, and at the thermostat housing it seems to be a plug sealing where one of those hoses should be connected. There is a Vacuum reservoir under the battery that only has one hose connected, the other one under the water reservoir seems to be with all the hoses connected.
Where the exhaust pipe is leaving the engine to the cat, there is a n opening at the side that is sealed.
The fuel filter is not the stock one, it only has one input and one output instead of 3 total, in addition is not on the right side close to the carb, but is down on the left side next to the fuel pump.
I have a plastic fuel tank, I think is 20 Gal maybe what worried me due to the overheating that the exhaust is experiencing.
Is the rear Axle upside down? or does the plug is right at that height?

I've checked oil level on both axles and seems to be a little low, the rear one is dark brow. I'm feeling a strange noise when I drive very slow, like human walking speed, there is a knock noise from the rear and I feel the car moving side way when it sound, suspecting that there is something wrong in the diff gears or the bearings.

Look at the pictures and please help me find out that are the things that I'm missing, if you thing that more detailed pictures are needed to identify something else I can take some more... Thanks in advance.

Regards from Cartagena, Colombia.

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Unread 05-07-2014, 08:25 PM   #2
Monohm
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1989 YJ Wrangler 
 
Join Date: Apr 2014
Location: Cartagena, Bolivar
Posts: 37
More pics
image_10.jpg   image_11.jpg   image_12.jpg   image_13.jpg   image_14.jpg  

image_15.jpg   image_16.jpg   image_17.jpg  
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Unread 05-08-2014, 08:18 AM   #3
Old4X
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1990 CJ7 
 
Join Date: Nov 2008
Location: Ga
Posts: 5,149
http://home.sprynet.com/~dale02/list.htm

The link above is for the late model CJs, your early YJ is all but identical under the hood.

Yours looks clean, just needs lots of TLC and attention to detail. Use the above link to identify the various components and hook them up properly.
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418 miles on 19 gallons of gas. Can't beat the BBD !
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Unread 05-08-2014, 08:23 AM   #4
Old4X
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"Is the rear Axle upside down? or does the plug is right at that height?"

Height is correct
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418 miles on 19 gallons of gas. Can't beat the BBD !
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Unread 05-10-2014, 05:23 PM   #5
Monohm
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1989 YJ Wrangler 
 
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Location: Cartagena, Bolivar
Posts: 37
Thank you all for the inputs. I will be posting my progress on this restoration... regards.
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Unread 03-30-2015, 05:29 PM   #6
Monohm
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Join Date: Apr 2014
Location: Cartagena, Bolivar
Posts: 37
Hi, long time away from this topic. I've pulled the carb out and noticed that it is missing the main mettering needles and the jets are different sizes. Do you guys know which replacement can be fixed to fit this stock carter bbd?

Any donnor of a complete carb?

Regards.
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Unread 03-31-2015, 05:35 AM   #7
Mike Romain
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Join Date: Nov 2007
Location: Off the Grid in Chester Grant, Nova Scotia, Canada
Posts: 15,684
Some folks on the CJ forum have been having good results from http://nationalcarburetors.com/ for replacements. They run about $150.00.
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86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
Some Canadian Bush Jeep Runs and Build Photos: http://mikeromainjeeptrips.shutterfly.com (10 new albums added Sept 16/10)
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Unread 03-31-2015, 08:39 AM   #8
Mike Romain
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Posts: 15,684
Oh, do you mean the pins that come in from the back side? If so, someone likely tried to get rid of the computer controls and went too far, those pins still need to block the holes partially for it to run right.
Lots of those Carter-Weber BBD carbs did come with different sized jets because they sit sideways in the intake, this balances the flow. If those pins are missing, well it is amazing it ran at all.
Do you have to pass emissions where you are? What folks do for an off road Jeep or if they don't have to pass strict visual emissions is to wire the ignition module directly to the distributor like a pre-82 CJ was wired. This bypasses the ECU, but it will still pass a tailpipe emissions test no problem.
They set the back stepper motor pins in the center of their travel.
That company, national carb sell both kinds of carbs. So if you don't have to pass the strict visual emissions, you would want a 1980 style BBD with no stepper motor.
Here is a link on bypassing the ECU. Basically you just hook the orange and purple wires at the distributor directly to the orange and purple at the ignition module. If your module doesn't have a purple, (yj might be different than the cj one)it is the wire that only goes as far as the first plug and stops.
http://www.jeepforum.com/forum/f8/ho.../topics/522262
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Mike
86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
Some Canadian Bush Jeep Runs and Build Photos: http://mikeromainjeeptrips.shutterfly.com (10 new albums added Sept 16/10)
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Unread 03-31-2015, 12:16 PM   #9
Jeepsr4me
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If you could get a EFI set up and install that would solve all your issues..

Cause that is a clean looking jeep.
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Unread 03-31-2015, 04:12 PM   #10
Monohm
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1989 YJ Wrangler 
 
Join Date: Apr 2014
Location: Cartagena, Bolivar
Posts: 37
Thanks for the inputs.

Actually I'm not missing the stepper motor pins, I'm missing the mettering rods and the right size of mettering jets. I've seen several mods to the ignition system and fuel delivery system.
But my target is to restore all devices with all stock equipment that the engine came with from factory. If once time it ran good with all those things, it should get close to that once restored. I'm doing a cosmetic restorarion as well, i've painted all the interior plastic dash board, door panels, etc.

So to get back in the subject of this thread, I know there are some improvements to be done but for now I'm looking for stock parts.

If anyone of you have a junk yard close by to see if they have a stock feedback carb I would appreciate some pictures and we can see the way to send the money trough paypal and get it shipped to Florida.

Regards.
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Unread 04-01-2015, 08:23 AM   #11
Mike Romain
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1986 CJ7 
 
Join Date: Nov 2007
Location: Off the Grid in Chester Grant, Nova Scotia, Canada
Posts: 15,684
You might want to post over on the CJ forum. Lots of folks are changing out their carbs rather than just putting a carb kit in them so you might be able to find one cheap or free. Same for any missing emission components. The national carb ones are $150.00 with a lifetime warranty.
Figure any used carb should get a kit put in it, they only run about $25.00 and aren't hard to do. Just don't unadjust or take apart anything you don't have to to clean it.
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Mike
86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
Some Canadian Bush Jeep Runs and Build Photos: http://mikeromainjeeptrips.shutterfly.com (10 new albums added Sept 16/10)
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