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  #271  
Old September 4th, 2020, 17:07
markaboo929's Avatar
markaboo929 markaboo929 is offline
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Re: Extended Idle 97-01 Install

97 and 98 had a distributor the 99 and up of course did not. The only thing I see that is changed is the coloring of the wiring but everything else should be fine I have to hook up my laptop still to verify that the spare ECM is a 97
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  #272  
Old September 5th, 2020, 10:41
Black1990jeep Black1990jeep is offline
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Re: Extended Idle 97-01 Install

What is an extended idle?

(asking for a friend)
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  #273  
Old September 5th, 2020, 18:37
jabinco jabinco is offline
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Re: Extended Idle 97-01 Install

It's an option that when switched on raises the idle rpm to ~1000 while in park or neutral. It was mostly found on police/government packages but is helpful for running heavy electrical loads (winch), or cooling a hot engine. Many lament that 1000 rpm isn't really that useful and I agree, 1250 or so would be better.
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  #274  
Old September 7th, 2020, 11:35
Black1990jeep Black1990jeep is offline
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Re: Extended Idle 97-01 Install

Quote:
Originally Posted by jabinco View Post
It's an option that when switched on raises the idle rpm to ~1000 while in park or neutral. It was mostly found on police/government packages but is helpful for running heavy electrical loads (winch), or cooling a hot engine. Many lament that 1000 rpm isn't really that useful and I agree, 1250 or so would be better.
Thank you for the detailed info!

On my old VW Van there was an idle speed valve that opened up when high idle was needed, it is simply a throttle valve bypass. it was opened at cold engine temp, and if the a.c. was running automatically by the brain, i.e. the ecu. No manual over ride.

Now that would be nice for my jeep. I run a winch and air compressor and idle speed is probably not putting out the charging current to match the high draw, specially if headlamps need be on.

Does anyone have a table or chart of the engine speed verses alternator output for a stock XJ system?

Or what is the alternator output increase gained by the factory extended idle option?
At what rpm is max alternator output?

I was thinking on my last winch use how I could rig a cam or lever to pull tight the throttle cable for such situations How does the factory system operate? Is it via the ecu opening the air valve, or some mechanical linkage thingy?

How about an idle speed adjustment knob on the winch controller! Or have the idle speed autoset to match the amps draw?

Anyway, how do you all rig an adjustable idle speed for instances of high electric load such as winching? It would be nice not to have to have a helper sit in the jeep to operate the foot pedal while winching.

What idle speed gives what amps output, and when is maximum output reached?

thanks again!

p.s.... A high idle at Park verses Neutral, is there a difference in tranny wear or heat generation, or safety issues with either method?
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  #275  
Old September 20th, 2020, 18:33
Gryphon439 Gryphon439 is offline
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Re: Extended Idle 97-01 Install

Quote:
Originally Posted by jabinco View Post
96 requires the option to be in the ECM. If your cherokee didn't come with the option then it's not there. Also, the dealer told me they couldn't put it in because when they flash the ECM they do it based on your vin, and my vin didn't have the option.

I wouldn't have thought a 97 ECM would work in a 96, you're saying it does?

The solution for me was to purchase a reman ECM from Flagship One with the option. It was only ~$150 and it works fine.
Any chance you can tell me more about this? Are you saying you purchased a '96 ECU that was reprogrammed to include the option? I'm hoping to do this to my '91
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  #276  
Old September 20th, 2020, 18:54
jabinco jabinco is offline
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Re: Extended Idle 97-01 Install

Yes, I looked up the OEM part number for the police package and ordered that from Flagship One. Honestly though, I don't know what to say about a 91, being OBD I. 96 was the first year of OBD II and I know how that it requires addition of a switch, wiring and an ECM that has the option if you don't have one already. 97 and up requires a switch and wiring, and my understanding (not personal experience though) is that all the ECMs have the option already. But pre 96 I really don't know how to do it or if the option even existed then. Hopefully someone else will chime in.
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