No job stated, must we guess what state car is in or what about to do.??????? (just want to change coil packs?) or what?
what engine ?
3.8L is my guess... the V6, old design...
odd is why not the 3.7L in 2010.?? who knows?
i have 2008 JK with older, 3.8L
choices by generation.
2.8L VM Motori RA 428 Diesel I4 (no, that, it dont fire)
Complete engine specs
[show]
3.6L Pentastar V6 (2012 up)
Complete engine specs[24]
[show]
3.8 L EGH V6 (bingo i think and still like mine)
Complete engine specs[25]
[show]
now why ask that.
the PCM the firing order is fixed. (in computer code)
what matters with IS WIRING UP COIL PACKS
DID YO SCRAMBLE THOSE?
or are you messing with cam timing???
now the shocker, for 3.8L
it's
123456
per this drawing
http://www.fixkick.com/Jeeps/ASD.html#coil-pack
how to wire the coil pack
http://www.fixkick.com/look/odds-ends/jeep/2008-JK/slideshow/firing-order.JPG
SOURCE: my 2002 jeep wrangler sport
Have you taken it to your mechanic to run the diagnostics... I had the same issue and it turned out to be a vapor lock issue that required a gas tank gasket replaced.
SOURCE: 1998 Jeep Wrangler Sport codes P0121 and P0122
did you check voltage to sensors if you need help with proedure, contact me, or you may try patrs houses on line in how to section.
SOURCE: 1994 jeep wrangler no fire
Crank position sensor has a higher failure rate than it should...however i would not change it "at random" Check for continuity between b&c terminals of the sensor with a digital ohmeter.
There should be no continuity between them (b&c should be marked on connector) No continuity reading is same as when probes are not connected to each other.
I really dislike when people try and help and use terms that owners can't understand ... "check your zxy and qtr then add an abc" dosen't seem helpful. I hope I am as clear as I can be!!!
Good luck.
SOURCE: 2006 jeep wrangler check engine light came on it
There is a software update for the PCM that addresses this issue. TSB 18-028-06
SOURCE: firing order diagram for 1998 Jeep
1998 Jeep Cherokee 4WD 4.0L MFI 6cyl
To avoid confusion, tag and remove the spark plug wires one at a time, for replacement.
If a distributor is not keyed for installation with only one
orientation, it could have been removed previously and rewired. The
resultant wiring would hold the correct firing order, but could change
the relative placement of the plug towers in relation to the engine.
For this reason it is imperative that you label all wires before
disconnecting any of them. Also, before removal, compare the current
wiring with the accompanying illustrations. If the current wiring does
not match, make notes to reflect how your engine is wired.
Fig. 1: The firing order can usually be found cast onto the intake manifold
Fig.: 1989-98 2.5L engine Engine firing order: 1-3-4-2 Distributor rotation: Clockwise
Fig.: 2.8L engine Engine firing order: 1-2-3-4-5-6 Distributor rotation: Clockwise
Fig.: 4.0L engine Engine firing order: 1-5-3-6-2-4 Distributor rotation: Clockwise
Fig.: 5.2L and 5.9L engines Engine firing order: 1-8-4-3-6-5-7-2 Distributor rotation: Clockwise
Also, here can review the Jeep XJ Service Manual.
I hope help you with this, Good luck (remember rated this help).
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