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post #1 of 4 Old 03-17-2003, 03:17 PM Thread Starter
kev1
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258 Questions

Here is the deal.

I am doing rebuild on a 1980 CJ-7 that use to have the GM-151. The 151 was removed and I bought a 1984+ 258 that I will be putting in my Newly Built 1980 CJ7. Obviously I don't have a computer for the 258. I am putting in the HEI conversion and a Weber Carb. Both have been purchased, so please don't give me too hard of a time.

My question is this. On the intake 1984 intake manifold there seems to be some sensors or something. There is on toward the front with two wire coming from it, and there is one on the bottom with one wire coming from it, and there is one toward the firewall. What are these for and where do they go?

Also, where does the connector on the Weber Carburetor connect to?

I am sure the hot wire on the HEI goes to the ignition module.

I am planning on removing all smog components, but I might go back with a Cat. So will I still need to use the Air Pump? It seems to me that I can remove it as well.

Thanks


1980 CJ7 Rebuild:


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Frame painted with a Rough Country 2.5" lift and shocks installed.
Alot of money spent on parts that are all over including a new 258.
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post #2 of 4 Old 03-17-2003, 05:46 PM
Jeep Daddy
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This link talks about most if not all of the sensors the 258 has.

Computer controls and emissions

Good luck

2004 Rubicon, 6" lift, 35s, winch, hard top, full doors, bumpers, tire carrier and rock sliders.
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post #3 of 4 Old 03-17-2003, 07:14 PM
bernie
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Referring to, "I am sure the hot wire on the HEI goes to the ignition module."

Everything I've read says bypass the module--
Run straight twelve volts from Ign. sw. power to the HEI.

On mine (82 CJ5, 258 w/ HEI), I cut the incoming power wire to the module, then extended it and ran it to the distributor.
(I also eliminated all the computer wiring, etc.--most wires/sensors did nothing and had been unhooked by previous owners).

This link may help with the HEI setup:

http://www.geocities.com/jeeperaz/hei.htm
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post #4 of 4 Old 03-18-2003, 08:57 AM Thread Starter
kev1
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Jeep Daddy, thanks for the link, this helped a lot and cleared some things up in my mind.

Bernie, running the wire from the ignition switch to the HEI make a lot more since, and I think you are right. If I would just take the time to read the instructions that came with it, they would prob. have set me straight and I wouldn't be wasting everyones time.

It seems to me when I put in the HEI and the Weber, there is no longer a use for the computer since it seems like the purpose of the computer is to adjust the idle and the timing depending on air and engine temperature and altitude, when you hook that ground wire up.

Thanks both of you.

1980 CJ7 Rebuild:


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Frame painted with a Rough Country 2.5" lift and shocks installed.
Alot of money spent on parts that are all over including a new 258.
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