Question about 1999 Jeep Grand Cherokee

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4.0 engine swap limititations

I'm hearing that only a 99-00 engine will replace mine in my 99 jeep grand cherokee 4.0. Do you know why that could be or if it is true and if so, what the difference is? thanks

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Hi, The earlier engines had a distribitor for the spark plugs, but later engines for the 1999-2004 cars, have a coil on top of each spark plug controlled by th PCM (or ECU). It may be possible to modify an older engine by using all the ignition gear from your later unit, but I haven't tried. Maybe ask at a Jeep used parts supplier, who may have done a similar job.

Posted on May 19, 2009

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Hello, I'm looking for a replacement for my jeep cherokee 99, the current part number is Chysler P56041 629AD, I found a Chysler P56041 278AD, can this computer works ok with my cherokee?


THE PCM MODULE.
no country stated, the 728ad shows Europe. (why?)
"I found"

where, at ebay, at pick-apart, or ?
USA cars have 11 PCM for one engine. fact.
and 100s more world wide.
what a question, just a p/n
then you post to grand Cherokee and then text leaving out Grand.?
why?
i searched the part at jeep and is wrangle part, 629ad.

you do know that it must be reprogrammed to your car right:?
the pcms on cars can vary
by engine, trans opted , 4wd/2wd,and year.
federal PCM
Calif PCM
and mexico PCM
and 9 more. just for 1999

is yours 42RE for 45RFE?? tranny??? 30/32 RH? what?
post county (or state if calif)
post engine and year
post body and not contradict.?
post drive line, in car, tranny and if 4wd?
then we can match it up
or call jeep.com

they (jeep) will do this magical thing!
ask you the VIN.
and then look it up in their database.
and see ALL THE ABOVE even what radio is in it. of 5.
me, im a glass half full guy (hard knocks, reality stuff)
id not even believe the part in car is correct.
im too SAVVY !
i find out from jeep what it should have first.

not one matches the 4.0L in the GC.


the 629 posted shows this at jeep.com

JEEP WRANGLER 2.5L Power Tech I-4 Cyl., 3-Spd. Automatic 30RH 1998
JEEP WRANGLER 2.5L Power Tech I-4 Cyl., 5-Speed Manual 1998
JEEP WRANGLER 4.0L I6 Power Tech, 3-Spd. Automatic 32RH 1998
JEEP WRANGLER 4.0L I6 Power Tech, 5-Speed Manual 1998
(if true needs to be programmed to each)

the send number
56041 278AD

lands at.
(part not found, is this a non usa part?) im stumped

was fun to try.
but im stumped.

Mar 31, 2016 | 1999 Jeep Grand Cherokee

1 Answer

I hav a 1997 Jeep Grand Cherokee and it engin just dies out while driving


Get some "dielectric" grease and put it on your ecm contacts. Also clean your "grounds" very well. Mine was located on the passenger side of the engine block on my 97' Grand cherokee laradoe. Mine did the same thing yours was. These jeeps are a wiring nightmare for some stupid reason, and this will be your least expensive fix before you start replacing EVERYTHING like i did!. Best of luck!

-B

Dec 28, 2012 | 1997 Jeep Grand Cherokee

1 Answer

I need the firing order for a 1994 Jeep Grand Cherokee Straight 6 engine


For 1994 Jeep Grand Cherokee:
2WD and 4WD have the same
4.0L In-Line 6-Cylinder:
Firing Order:

1-5-3-6-2-4
Cylinders:
(back)
...6
...5
...4
...3
...2
...1
(front)

Distributor:
....(back)
.....5....3..(+)-screw
1.............6
(+).4....2

Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!

May 20, 2010 | 1994 Jeep Grand Cherokee

2 Answers

Replace a crankshaft position sensor on a 1996


1st I need to know what engine you have, 4.0L or 5.2L V8.

Oct 02, 2009 | 1996 Jeep Grand Cherokee

1 Answer

What is the firing order of a 2005 jeep grand cherokee


I wrote all engine spec for a 2005 jeep grand cherokee

3.7L 6 cylinder
1-6-5-4-3-2

4.7L 8 Cylinder
1-8-4-3-6-5-7-2

5.7L 8 Cylinder
1-8-4-3-6-5-7-2

let me know if this help you.....

Sep 30, 2009 | 2000 Jeep Grand Cherokee

2 Answers

Jeep Grand Cherokee Laredo 1998 headlight assembly instructions


youtube.com type in 1998 grand cherokee headlight assembly, I just fixed mine in 10 minutes, both of them!

Mar 31, 2009 | 1998 Jeep Grand Cherokee

1 Answer

1995 jeep grand cherokee power loss


could be engine mounts have to replace mine engine almost jumps outta the compartment

Sep 18, 2008 | 1995 Jeep Grand Cherokee

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