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difference between a police cherokee and regular cherokee?

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Old 11-19-2017, 07:40 AM
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Originally Posted by Anony
Most likely yes. The re-programmers often will cross-reference the VIN to the PCM, however you may be able to find a re programmer who doesn't need a VIN.
It does also say that if you do not supply a VIN then it will be shipped as is. But would "as is" be out of the box with a police package or would it come "un-programmed" I wonder?
Old 11-19-2017, 08:02 AM
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Originally Posted by Anony
Most likely yes. The re-programmers often will cross-reference the VIN to the PCM, however you may be able to find a re programmer who doesn't need a VIN.

I unable to remember if the VIN is stored in the PCM or not. (I believe it is but not hundred percent certian) IIRc, things such as mileage is stored in the PCM and the instrument cluster.

You would need to write to them and ask. Let them know you want e.g. your 96 XJ standard PCM reprogrammed to a 56043202 1996 w/Police Pkg. See if they would go for it. or if your purchasing another PCM you would need to write and ask if they could program the PCM your purchasing from them to a police package PCM without a VIN. Possibly a VIN is required because of Chrysler licensing issues or other.

Another reason they may need a VIN is the VIN is related to any add-ons. A police package vehicle potentially has other add-ons and modifications effected by the PCM programming.

Other add-ons e.g. performance intake and exhaust manifolds, etc.

I think one known difference is the extended idle feature that comes with most police packages.
Thank you, I see you added more here. That was were I was going with this. It might be better to not give them a VIN or explain that you would rather not have it "detuned" to match your "civilian" VIN. lol
Old 11-19-2017, 03:18 PM
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I had a 93 police package. It was awesome.

Until the computer fritzed out.

They only made 800 1993 XJs with the police package, and the PCM was encased in epoxy. I sent it off to get repaired and the PCM repair guys took one look at it and sent it back.

I tried to find a replacement for a year. Never did. Even put a $500 bounty out on some of the forums.

Of course, that was 10 years ago and I barely knew how to change my own oil back then. Now I'm pretty sure I could have just grabbed another 93 auto PCM* and been back in business.

Its the only vehicle I've ever owned that I truly regret selling.

* I had tried a 92, thinking that would work. When it didn't, I assumed that I needed the police package. Later, after I sold it, I found out that 91-92 share PCMs, 94-95 share PCMs, but 93 is it's own thing.
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Old 11-19-2017, 03:31 PM
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Originally Posted by wizardpc
I had a 93 police package. It was awesome.

Until the computer fritzed out.

They only made 800 1993 XJs with the police package, and the PCM was encased in epoxy. I sent it off to get repaired and the PCM repair guys took one look at it and sent it back.

I tried to find a replacement for a year. Never did. Even put a $500 bounty out on some of the forums.

Of course, that was 10 years ago and I barely knew how to change my own oil back then. Now I'm pretty sure I could have just grabbed another 93 auto PCM* and been back in business.

Its the only vehicle I've ever owned that I truly regret selling.

* I had tried a 92, thinking that would work. When it didn't, I assumed that I needed the police package. Later, after I sold it, I found out that 91-92 share PCMs, 94-95 share PCMs, but 93 is it's own thing.
Oh man... nothing like parts you could have had if you had known. I had a guy offer me ten bucks for a 292/312 ford four barrel intake and a set of early T bird "factory aftermarket performance rams horn" exhaust manifolds the other day. I was like "What...?"

"Excuse me...I have work to get done... and you have wasted enough of my time." He said "wait... how about..." BYE, PLEASE LEAVE SIR, I would rather give these to someone else for free than have my intelligence insulted! lol
Old 11-19-2017, 04:47 PM
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Originally Posted by Bugout4x4
Oh man... nothing like parts you could have had if you had known. I had a guy offer me ten bucks for a 292/312 ford four barrel intake and a set of early T bird "factory aftermarket performance rams horn" exhaust manifolds the other day. I was like "What...?"

"Excuse me...I have work to get done... and you have wasted enough of my time." He said "wait... how about..." BYE, PLEASE LEAVE SIR, I would rather give these to someone else for free than have my intelligence insulted! lol
He might as well offered you $10 for and original BOSS429! He was hoping you had no idea what you had there
Old 11-19-2017, 05:02 PM
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Originally Posted by jedijeb
He might as well offered you $10 for and original BOSS429! He was hoping you had no idea what you had there
Lol... And claimed to be a "Ford guy"... He was a city guy who thought I was a backwoods hillbilly and didn't truly know what those particular castings are worth.

They are so rare that I am pretty sure I have the only matching not cracked set in the country. lol
Old 11-20-2017, 03:06 PM
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I think you would need to find a reprogrammer who doesn't require a VIN.

I'm not certain what they would send you without a VIN as there's a bunch of PCM's OEM numbers for a 96 XJ each with slightly different programming. Some XJ's PCMs are for other countries with different emission regulations. Here in the US we have basically Federal and California PCM's (I'm not certain of states such as NY and a few others, some follow Calif emissions whereas most others follow Federal)

However if you can order a programmed 56043202 1996 w/Police Pkg or find one online then it would be already programmed as a police package.

Such as the one on eBay, price may be higher than you may want to pay. I've found good PCMs at the JY for my 98 for around $50.00, however to find a police package XJ at a JY may prove to be difficult.

Then there's other programming differences such as between manual and automatic transmissions, etc.

To flash or download the flash code for a PCM usually requires a Tech Authority subscription (unless you happen to already have the code).

Tech Authority offers from one day to one year subscriptions, from which pcm code is downloaded. A one day subscription is $24.95 so potentially this is all it costs to reprogram a PCM if the person is already setup to reprogram a Chrysler PCM.

Plus you need a compatible DRB-II/III scanner or device to program the code into a Chysler Jeep. I'm not certain from here the exact processes to reprogram as I've never reprogrammed an ECU or PCM. There are DRB III emulators which is a pc software that runs on a PC and interfaces with a DRB III scan too. I think some of these devices allow code to be downloaded directly to a scan tool or re-programmer.

There are J2535 Pass-thru devices and Chysler scan tools used to program the PCM. The aftermaret J2535 Pass-thru devices need to be DRB-II / DRB-III compatible and can be used instead of an actual Chrysler scan tool.

The Chrylser hand held scan tool runs around 6 grand new, but can be found for half the cost and less used.

Since the process is complicated and potentially expensive, most people use someone whose all setup to reprogram. Garages often will reprogram PCMs, some using aftermarket reprogrammers, so you may want to try a local garage and ask, perhaps charge a fee for around ~$50.00?

However they would either need to have the pcm code for a 96 XJ police package or perhaps a subscription to Tech Authority, which may require a VIN? I'm not certain about a VIN as people mod vehicles installing different engines, transmissions, etc. so a VIN wouldn't match their modded vehicle and would require other programming.

Last edited by Anony; 11-20-2017 at 03:24 PM.
Old 11-20-2017, 04:15 PM
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It was years ago I looked into finding a J2534/Pass Thru Device

to reprogram my own PCM, but never followed up on getting one.

There are aftermarket J2534 Pass-Thru OBD2 Devices from under $200.00 however whether it can actually reprogram a Chrysler PCM is questionable as many are only advertised as having diagnostic capabilities.

Some auto manufactures invested heavily into their ECU related equipment and their ecu or pcm technology can only be purchased by aftermarket vendors who may include with their scan tool products, costing at least several hundred dollars.

These scan tool products normally charge more for products with more features, functions and capabilities. Garages often invest heavily into these products as all newer vehicle are now computerized with at least one computer. These ECU/PCM related products are continually updated for a fee or replaced with newer models at a cost as newer model vehicles arrive on the market.

I know auto manufactures need to recoup their investments however imo vehilce owners should be able to easily tune up their own vehicles as the old days when we use to tune vehicles by adjusting the carburetor, timing, etc.

It shouldn't be such a hassle if one wants to adjust or improve things controlled by a computer. My current gas milelage is terrible however as my XJ ages I'm not able adjust anything to improve my fuel economy and runability. PCM programming is written for new vehicles and not older vehicles and vehicles with e.g. ~100,000 - 200,000+ miles. As a vehicle ages it often requires adjustments so it can run properly.

There are other things such as when owners create mods such as larger tires, suspension, different intake, exhaust, carrying constant loads, etc. These all may require some adjustments to the PCM which controls both the engine and transmission (shifting), etc.

Also you may not want to be tuned the same for all environments and terrains such as on-road, off-road, extreme, commuting, etc.

You can try and use one those addon computers, however how well those actually work and what areas of a PCM and other modules (such as the TCM) is accessible, is very questionable.

Last edited by Anony; 11-20-2017 at 04:33 PM.
Old 11-21-2017, 06:18 AM
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Originally Posted by Anony
I think you would need to find a reprogrammer who doesn't require a VIN.

I'm not certain what they would send you without a VIN as there's a bunch of PCM's OEM numbers for a 96 XJ each with slightly different programming. Some XJ's PCMs are for other countries with different emission regulations. Here in the US we have basically Federal and California PCM's (I'm not certain of states such as NY and a few others, some follow Calif emissions whereas most others follow Federal)

However if you can order a programmed 56043202 1996 w/Police Pkg or find one online then it would be already programmed as a police package.

Such as the one on eBay, price may be higher than you may want to pay. I've found good PCMs at the JY for my 98 for around $50.00, however to find a police package XJ at a JY may prove to be difficult.

Then there's other programming differences such as between manual and automatic transmissions, etc.

To flash or download the flash code for a PCM usually requires a Tech Authority subscription (unless you happen to already have the code).

Tech Authority offers from one day to one year subscriptions, from which pcm code is downloaded. A one day subscription is $24.95 so potentially this is all it costs to reprogram a PCM if the person is already setup to reprogram a Chrysler PCM.

Plus you need a compatible DRB-II/III scanner or device to program the code into a Chysler Jeep. I'm not certain from here the exact processes to reprogram as I've never reprogrammed an ECU or PCM. There are DRB III emulators which is a pc software that runs on a PC and interfaces with a DRB III scan too. I think some of these devices allow code to be downloaded directly to a scan tool or re-programmer.

There are J2535 Pass-thru devices and Chysler scan tools used to program the PCM. The aftermaret J2535 Pass-thru devices need to be DRB-II / DRB-III compatible and can be used instead of an actual Chrysler scan tool.

The Chrylser hand held scan tool runs around 6 grand new, but can be found for half the cost and less used.

Since the process is complicated and potentially expensive, most people use someone whose all setup to reprogram. Garages often will reprogram PCMs, some using aftermarket reprogrammers, so you may want to try a local garage and ask, perhaps charge a fee for around ~$50.00?

However they would either need to have the pcm code for a 96 XJ police package or perhaps a subscription to Tech Authority, which may require a VIN? I'm not certain about a VIN as people mod vehicles installing different engines, transmissions, etc. so a VIN wouldn't match their modded vehicle and would require other programming.
Originally Posted by Anony
It was years ago I looked into finding a J2534/Pass Thru Device

to reprogram my own PCM, but never followed up on getting one.

There are aftermarket J2534 Pass-Thru OBD2 Devices from under $200.00 however whether it can actually reprogram a Chrysler PCM is questionable as many are only advertised as having diagnostic capabilities.

Some auto manufactures invested heavily into their ECU related equipment and their ecu or pcm technology can only be purchased by aftermarket vendors who may include with their scan tool products, costing at least several hundred dollars.

These scan tool products normally charge more for products with more features, functions and capabilities. Garages often invest heavily into these products as all newer vehicle are now computerized with at least one computer. These ECU/PCM related products are continually updated for a fee or replaced with newer models at a cost as newer model vehicles arrive on the market.

I know auto manufactures need to recoup their investments however imo vehilce owners should be able to easily tune up their own vehicles as the old days when we use to tune vehicles by adjusting the carburetor, timing, etc.

It shouldn't be such a hassle if one wants to adjust or improve things controlled by a computer. My current gas milelage is terrible however as my XJ ages I'm not able adjust anything to improve my fuel economy and runability. PCM programming is written for new vehicles and not older vehicles and vehicles with e.g. ~100,000 - 200,000+ miles. As a vehicle ages it often requires adjustments so it can run properly.

There are other things such as when owners create mods such as larger tires, suspension, different intake, exhaust, carrying constant loads, etc. These all may require some adjustments to the PCM which controls both the engine and transmission (shifting), etc.

Also you may not want to be tuned the same for all environments and terrains such as on-road, off-road, extreme, commuting, etc.

You can try and use one those addon computers, however how well those actually work and what areas of a PCM and other modules (such as the TCM) is accessible, is very questionable.
Thank you for sharing the time to write up these last two detailed explanations! Great info on this!

Last edited by Bugout4x4; 11-21-2017 at 06:21 AM.
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Old 11-21-2017, 11:14 PM
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Originally Posted by wizardpc
if you're asking because yours is bad, just grab a pcm from any 96 auto. It must be a 96!
my pcm is fine. Was curious if they were programmed different or chipped for hp gain like many police vehicles.
Old 07-13-2021, 09:19 AM
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Originally Posted by a1racer
on the police model xj there is a switch to raise the idle right by the fog and wiper
Not all police package xj’s came with the ext idle switch I had a 98 jeep that was a burn jeep and there wasn’t a ext idle switch. And the title read that it was a fleet vehicle.
Old 07-13-2021, 01:20 PM
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I believe that the "police package" is another name for "fleet vehicle". If a business or agency purchases a large enough fleet of vehicles, the manufacturer will build them to order, within reason. My VIN decodes as "Police Package" but damned if i know what makes it different from a Sport.
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Old 07-13-2021, 01:37 PM
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IMO Police XJ and a Fleet XJ are 2 different things.
Fleet could be for anybody. Car rental company, gas company, government, etc.
Thinking just a volume purchase.
2 significant things, that are easy to spot, I believe separate a real Police XJ from a regular one is the rubber floor and the Ext Idle switch.
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