"P-Time" Light on. 90-4.0, AW4. Disco "command track"

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Jan 8, 2013 | 07:50 PM

#31

cruiser54

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From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by DFlintstone

Will do! (Jeff and I will be rich! I smell the money already).

I did a quick measurement. "3/8 from the bolt hole" seems to be about 1/2in. advance. Have you/are you running any like that? And...does it ping (on regular/87 Octane) AND...have you run it with the knock sensor unplugged?

If I run two with a DPDT switch, I suppose it should turn on the water injection when switching to "highway/advanced".

No ping at all at any altitude. You got a knock sensor. Just do it. Don't forget the photos for me.

Jan 8, 2013 | 10:30 PM

#32

DFlintstone

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Joined: Aug 2011

Posts: 10,489

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From: Nor-Cal Coast

Year: 90,84

Model: Cherokee

Engine: 4.0,2.5

Quote:

Originally Posted by DFlintstone

AND...have you run it with the knock sensor unplugged?

U got your foil down over your glasses again? I was wondering if you have run an advanced one with the knock sensor unplugged. (neat tip btw).

Last edited by DFlintstone; Jan 8, 2013 at 10:33 PM.

Jan 9, 2013 | 06:34 AM

#33

cruiser54

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Joined: Aug 2011

Posts: 43,971

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From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by DFlintstone

U got your foil down over your glasses again? I was wondering if you have run an advanced one with the knock sensor unplugged. (neat tip btw).

No. Why would I do that?

Besides, I live at over 5,000 foot elevation so I wouldn't be a good test mule. Whereas, you would.

Jan 10, 2013 | 02:34 AM

#34

DFlintstone

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CF Veteran

Joined: Aug 2011

Posts: 10,489

Likes: 24

From: Nor-Cal Coast

Year: 90,84

Model: Cherokee

Engine: 4.0,2.5

OK..I'm slow to wrap my head around something, but I usually get it right. The bolt hole clearance you mentioned might be 1/2 inch, (of a radius curve)(at X dia).

Octane is a rating, not a substance. I actually want to fit two with a DPTD switch. (my foil is wearing thin).

See if the knock sensor is keeping your advanced CPS from knocking with 87 octane (rating)......Boss!

To answer your question, "No. Why would I do that? " Because I want to see 27.5 highway MPG. (I have gotten 24MPG on an engine pushen 300K as we speak). I can, and will goose that up, the operation of the knock sensor is a major factor.

Jan 10, 2013 | 07:18 AM

#35

cruiser54

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Joined: Aug 2011

Posts: 43,971

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From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by DFlintstone

That would require me driving with the DRB wiring running from the engine bay to the cabin for one. I don't want to risk damage to the DRB. And, my elevation of over 5300 feet would not be a good comparison for your elevation since the advanced CPS was made for my kind of locations.