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Unread 05-08-2013, 12:24 PM   #1
DoubleDown
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What are these engine parts ?

The "bell" shaped part is on the passenger side near the back of the engine. What is it and what does it do ?
The second is on the drivers side and is screwed into the intake manifold. It looks like two wires were cut off of it. I just don't know what these parts are.
The CJ is nuttered and runs ok if it's not too cold out.

image-1486769932.jpg   image-653526602.jpg  
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Unread 05-08-2013, 12:28 PM   #2
gosupes
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Top pic is an oil pressure sender for a gauge. The bottom pic looks like a temp switch/sender.
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Unread 05-08-2013, 12:38 PM   #3
DoubleDown
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Do you think the wires that were cut form the temperature sender went to the computer ?
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Unread 05-08-2013, 12:53 PM   #4
M20Keeper
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I don't think the 83 had a computer did it? I thought they came into the Jeep in 85. I'm sure it had something to do with emissions though.
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Unread 05-08-2013, 01:21 PM   #5
keith460
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Quote:
Originally Posted by DoubleDown View Post
Do you think the wires that were cut form the temperature sender went to the computer ?
Yes, that would be the one that sent temperature info to the MCU.
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Unread 05-08-2013, 01:32 PM   #6
walkerhoundvm
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Quote:
Originally Posted by keith460 View Post
Yes, that would be the one that sent temperature info to the MCU.

Seconded. I've just spent the past week learning all about this system. No computer, no need for that to be connected. But you should have a computer on an '83...which doesn't matter if you've been nutter'd.

There should also be a temperature switch under the rear hose on the manifold, with a single post. That one serves as a ground for the manifold heater relay. With poor engine performance in the cold, before the engine warms up, I'd be suspicious you haven't got that in working order, either.
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Unread 05-09-2013, 09:04 PM   #7
DoubleDown
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Thanks, I'll look into that.

'83 was the first year the CJ got a computer, after the bypass was done I removed all the unnecessary wiring and that is when I noticed the other things. I'm still trying to get a grasp on everything one step at a time. It's been a fun journey and so far so good.
Thanx as always to all that replied
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Unread 05-10-2013, 02:41 AM   #8
John Strenk
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This is for an 85 but should be similar to what you have.

http://home.sprynet.com/~dale02/

Also on the top photo is an oil pressure SWITCH that also controls the manifold heater and the e-choke.

If the MCU harness is gone, you may have lost the connections for these things.
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Unread 01-09-2014, 06:58 PM   #9
DoubleDown
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So, I checked out the site and need to reconnect the e-choke wires to the oil pressure switch, but the wires are gone.
How can I reconnect them ? Should I go to a junk yard and take the wires, I guess all u really need is the connectors.
Any suggestions ?
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Unread 01-09-2014, 08:22 PM   #10
SouthernGypsy
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The PO must have done your nutter incorrectly, or did more than just the nutter because you still have those wires left after a simple Nutter by-Pass. It doesn't remove those.
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Unread 01-09-2014, 09:14 PM   #11
DoubleDown
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So, my question is how to replace them ?
If I get the connector for the choke where do I run it to ? The oil pressure switch I think, but where do I connect it ?
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Unread 01-09-2014, 09:26 PM   #12
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Not the Oil Pressure "Sender" that you are calling an oil pressure switch. The actual device is called an Electric Choke Switch and it is screwed into the same union as the Oil Pressure Sending Unit.

The Electric Choke Switch sends power to the Manifold Heater Relay AND the Choke Heater at the same time. All you need to do is splice into the Electric Choke Switch which will have power to it anytime the key is on. It will close when oil pressure is present and send that power to the Electric Choke AND Manifold Heater Relay.
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Unread 01-09-2014, 10:55 PM   #13
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If you dig out a wiring diagram you will find the ECS is fed by a Red wire that is live in ACCY and Run. Look in that wiring loom along the bulkhead for a Red wire as it feeds several things in the engine bay from the fuse box down a red wire.

The Manifold heater is fed by a relay. The control side comes from the ECS. The power for the heater itself comes from a splice into the large red wire that runs from the solenoid up to the bulkhead and eventually feeds the fuse box.

You therefore need to locate the Manifold Heater Relay and check how it is wired.
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Unread 01-10-2014, 03:07 AM   #14
John Strenk
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I think this discussion is also going on in another post. shall I combine them?
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Unread 01-10-2014, 04:05 AM   #15
keith460
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I would since the OP was only asking what the parts were and is now posting with another forum member on how to wire them.
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