Question about 2006 Jeep Liberty
Overheated removed coils on cyls 2, 4, 6, to run gasket repair process, no leaking coolant, but the 2 & 4 cyl has no spark
But before try 1,2 and 3..
You can check your spark plugs and coils from others (1,3,5,6) at 2,4.
If the spark plugs and coils work on 1,2,5,6 but 2,4 with change trying..
You have to check the 1,2 and 3.
(I hope you understand with my poor English explain)
Posted on Mar 31, 2014
3.7 V6, mileage?
most likely the HV wires bad.
then bad coil pack.
did you check spark directly at the coil pack?
i use 2 known good HV wires to do that and 2 good test spark plugs.
both plugs grounded to engine (shell)
that is how you test any wasted spark coil pack. 3 coil pack.
if that fails the FSM shows, unplugging it and check the coil resistances. if wrong the pack is bad,
keep in mind the res. can read ok and coil be bad ,due to internal insulation break down (internal shorts)
if thats ok. the resistance , make sure the wires are not (primary)
to the coil (the low voltage connnector)
if that is ok, its mostly likely a bad coil, (pray not bad PCM)
if tool-less? start with cheap parts , work to expensive. (guessing)
now wasted spark 101.
if one line opens , both spark plugs die. no spark
the wasted spark is wired in SERIES. ( like Christmas lights)
the magic cuts cost of 6 coil\'s.
so if the HV wires are say, cheap , carbon wire and open
you lose, both spark plugs. use MAG wire and end this issues.
get some nice NGK mag wire or Bosch Mag wires.
you can see i hate carbon wire. for good causes.
(carbon string wire)
mag wires is real wire that is coil spun and is inductive. it
has the correct impedance but is not a resistor its and inductor.
and lasts the longest , and worth every penny.
Posted on Mar 30, 2014
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Posted on Jan 02, 2017
This code is a catalyst efficiency code. The catalytic converter is most likely the problem, but it could still be caused by a defective oxygen sensor. The easiest way I know to check for this code is with a scan tool that is capable of reading live data stream. You need to look at the upstream and downstream oxygen sensors, and see if they are mirroring each other. In other words, if the upstream (the one before the catalytic converter) is reading .700, and the downstream ( the one behind the catalytic converter) is reading .700, or anywhere near that, then you have a problem. The numbers are just examples. The upstream should constantly swith from high to low voltage. If the downstream is identical, or even remotely close to having the same reading as the upstream, then you most likely have a defective catalytic converter. This does correspond to what happened a couple of weeks back. A misfire will take out a catalytic converter if not repaired quickly. Also, if you had a converter that was marginal, and was close to failure, then that misfire may have been just what it needed to fail.
Posted on Nov 10, 2008
your fluid is anti-freeze/coolant leaking from the heater hoses or heater core inside the heater box.check level of coolant in overflow reservoir under hood.
Posted on Oct 17, 2009
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