Help with trouble shooting error codes-
#1
Junior Member
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Help with trouble shooting error codes-
My nephew just got his first vehicle, a 2001 4.0 Cherokee Sport with 150,000 on the speedo. Right off the bat he had to have a radiator and now it is running rough especially on cold mornings. The check engine light came on and reading them indicates a P1494 and a P0300.
Read up on the valve/carbon problem that there was a TSB out on. However, the vehicle does not exhibit rough running or missing when under a load or while cruising on the Interstate at higher revs so I am thinking perhaps this isn't the problem.
It idles very rough on a cold start and even when warm it does not idle as smooth as it should, it still feels a bit rough. Being a kid he doesn't have a pocket full of money to start throwing at it. I thought this might be a good place to start looking for pointers.
Thanks for your help up front.
Read up on the valve/carbon problem that there was a TSB out on. However, the vehicle does not exhibit rough running or missing when under a load or while cruising on the Interstate at higher revs so I am thinking perhaps this isn't the problem.
It idles very rough on a cold start and even when warm it does not idle as smooth as it should, it still feels a bit rough. Being a kid he doesn't have a pocket full of money to start throwing at it. I thought this might be a good place to start looking for pointers.
Thanks for your help up front.
#2
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Join Date: Oct 2008
Location: Vail, CO
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Year: 2000
Model: Cherokee
Engine: 4.0
Try this website, it has helped me out too many times....
http://www.geocities.com/dtmcbride/h..._dtc_jeep.html
http://www.geocities.com/dtmcbride/h..._dtc_jeep.html
#3
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Year: 1996
Model: Cherokee
Engine: 4.0 I6
P0300 means there's a misfire in one or more cylinders. I had that problem with my '96, it cleared up a little bit when I replaced the cap, rotor, plugs and wireset but it still runs a little rough on colder mornings. Mine also runs rough after I push it pretty hard (pedal to the floor for a sustained period of time), does yours do the same thing?
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