I took the jeep on a mini-road trip to our lady of the snows thursday night to see some awesome christmas lights. Trip was about 100 miles round trip, as soon as I returned home I stopped to grab food. When I came back outside and fired the jeep back up it had alot of trouble starting and idled horribly. I turned it off then back on again and it started and Idled fine but now I have the p0300 code on my CEL. OBD-codes says its mutiple misfires? Has anyone had this before? Ill probably start with new spark plugs and then go from there.

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04 Rocky mountain KJ (SOLD)
OME Front Kit 790 springs on OME NS131s
skyjacker rear shocks and springs
ARB Deluxe bumper w/ Warn 9500i
Skid plates all under
ARB On-board Air w/ Front & Rear Air Lockers
JBA 4.5 UCA's
Lots O' Lights

"If it ain't broke...it might be after i try this!"

I thought P0300 was the o2 sensor

I just posted on that. Also, does not belong in the 4x4 section.

http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=1&t=57747

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New KJ Gear - Desert Armor Flak

2004 Renegade Light Khaki - 4" JBA Lift - Rock Lizard Products: Komodo Dragon Rear Bumper, Prototype Winch-mount Front Bumper, Super Skink Sliders - All J's Super Tranny Skid II - 31" Firestone Destination AT's on Moab wheels - Cobra 75W CB w/ stock Antenna mod

[b]Retired, US Military

Had that code once in the past. Got it fixed by changing spark plugs and cables

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It only takes one man to place a trail..

old thread i know, but add me to the list of P0300 "victims."
had the CEL flashing on my Jeep 2 days in a row now (flashes for about 15 seconds, then stops.) pulled the codes with my reader and it's got P0300 listed as 'pending'. CEL isn't lit steady either. It had OEM plugs and a full going over back at 30k miles (just under 36k currently).

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2007 Jeep Liberty Sport 4x4 3.7L 6spd

• MOABs with Goodyear Wrangler All-Terrain Adventure With Kevlar 245/70R16
• JBA UCA 4.5
• OME 790/948/90009/N32
• Western Suburbanite 7'4" plow
• DetoursUSA Backbone
• HF 12k# winch

[SIZE="1"]WTB: project liberty near N.NJ. stick shift, 4x4, working motor optional, CHEAP[/SIZE]

I have the same problem but no issues on running, no stumble, rough idle or anything like that. I will be changing my spark plugs and see where that takes me. I am wondering if maybe some how the remote start is the problem but I had a dealer install it so I will also talk with them to see if anyone else has the same issues.

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Its a Jeep Thing...
IF CAPS LOOK IS ON IM AT WORK DONT WORRY BOUT IT IM NOT YELLING HAHA

2005 RENEGADE 4X4
2.5 RUSTYS LIFT
245/75/16 GOODYEAR MTR'S
FULL TINT
13 MILES TO THE GALLON.....GOD darn HAHA

I used to have seen this code.

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