P0300 code and oil pressure gauge drops to zero at idle

fourmustangs

fourmustangs

TJ Enthusiast
Joined
Apr 10, 2017
Messages
280
Location
Houston, TX, United States
Because Jeep......

I have a P0300 code so its multiple misfies...but that is only code so doesnt specify a a cylinder.
It doesnt run bad...it occasionally has a shimmy in the engine...would that be a whole coil pack to replace or still could be a vacuum leak?


2nd issue

The oil gauge will drop to 0 at idle and set off the buzzer but the engine feels like it runs perfect while doing this. but it will go from 0 to about 60% on the gauge at idle, when driving im at 60%. would this be an easy fix?
135K miles 2005

2005 LJ.jpg


2005 oil pressure.jpg
 
It probably is the sender, and the sender may be okay. I bout had a cardiac when I looked at my oil pressure gauge the 1st time, it was below 40, no alarm.
That sending unit is not accurate, and that is what I was told in person by an employee at a Jeep store in Wylie, Texas.
I have not touched mine.
...however maybe in your case you should consider installing a new OEM sending unit, that should at least stop the alarm.
 
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