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post #1 of (permalink) Old 03-23-2001, 10:06 AM Thread Starter
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help with 83 258 intake manifold

I am planning on swapping out my 78 manifolds for a set of 83's. I need an intake heater and this was the cheapest way of doing it. Now I was hoping somebody could tell me what all this stuff is!!! I think...

1) O2 sensor
- Anybody think of any use for this? I have no computer.
2) Coolent in and out
- Can someone tell me the flow pattern (front -> back?)? Just cut into the heater line and route thru this?
3) CTO for the EGR
- won't be using this or the EGR. Plating it over and plugging all holes.
4) Anybody know what this is?
5) Same deal. What is it?
6) Intake heater temperature sensor/switch
- Goes to ground when at a particular temperatue? Might use but see #7...
7) Power lead for intake heater
- Anybody know aperage on this? I was planning on just hooking it up to a fused switch off the battery. Simplicity...

Any help with any of these items would be greatly appreciated.



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post #2 of (permalink) Old 03-23-2001, 11:19 AM
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Re: help with 83 258 intake manifold

I did the same thing when I added fuel injection. My old manifold was a one-barrel (EFI required 2-barrel) and the exhaust didn't have an O2 sensor provision. I removed the EGR (original intake didn't have it) and covered the hole with an aluminum plate and a gasket. I cut the tube from the exhaust, crimped it shut, and sealed the crimp with a brazing rod. I don't know what the flow for the coolant is and don't think it matters. Just rerouted my heater lines. That #4 is a knock sensor and I'm not sure about the others. For all of those that I didn't use for the EFI I just removed them and filled the holes with 3/8 NPT brass pipe plugs with some teflon on them. My heating element is not currently hooked up as the jeep doesn't get driven much in the winter.

'75 CJ5,258 w/Howell EFI,T18a,4.27's,33's,On-board air,Warn 8274
post #3 of (permalink) Old 03-23-2001, 03:38 PM Thread Starter
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Re: help with 83 258 intake manifold

Thanx for the info. So nothing to really use so far but the heater unless I find a bargain basement fuel injection :-)




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