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Unread 04-16-2012, 05:45 AM   #1
dirtyb
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1981 CJ8 
 
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Cj 4.0 Head and MPI Swap to CJ - What is this thing?

I feel stupid asking this, but I've never worked on a fuel injected engine before (only old harleys, CJ's and lawn mowers ).

What is this thing?



I'm swapping a head and MPI set up from a 1994 Jeep Grand Cherokee onto my CJ-8. I grabbed this thing from the donor vehicle, but I'm not sure what it's for and if I need it. It's got a 4 prong electrical plug that is still on the donor wiring harness, a spot for a vacuum hose, and a cable that fits onto the the throttle. I'm guessing it has something to do with raising RPMs for a warm up period or maybe the cruise control.

Has anyone done an MPI swap specifically with a 1994 Grand Cherokee? I read on some other posts that there may be a security system that needs to get bypassed on the computer.

rps20120416_062208_435.jpg  
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Unread 04-16-2012, 06:28 AM   #2
meatlord
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Definitely looks like cruise components to me.
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Unread 04-16-2012, 07:00 AM   #3
ratmonkey
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That's the cruise control.
Idle is controlled by the computer with the idle air control servo on the throttle body, (cylindrical unit on the side 90 off from the throttle lever).
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Unread 04-16-2012, 07:09 AM   #4
dirtyb
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Then that answers my question. I'll put it on Craig's list in case someone needs a replacement, because my old CJ is not gonna have cruise control.

thanks for the help
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