Https://www.jeepdied.com/no-start.html
manual trans or automatic, the are not the same.???????
so fix when not starting, afterwords that can be impossible
to fix this, scan it
the scan tool will tell why it lost spark
p03xx errors
do not play with CKP sensor,if you remove, it and not put it back like the FSM states, it will never start or be damaged
it has critical gap there. (see fsm exception)
there are 3 eCU inputs that kill spark
dead cmp
dead ckp'
and dead tachomter, ignitor signals,
all 3 , will kill the ASD relay dead, (6 ways) (scan it)
this fact , is why we scan ,and not guess.
if you install a new ckp , and do it wrong, its destroyed in some cases.
to read how to do it right (ckp)
read the free fsm
THE TJ JEEP
HERE
http://www.morris4x4center.com/knowledge-base/index.htm?utm_source=cj#service
WE HAVE 100'S OF posts here,making the CKP install error.
click ignition chapter
8D-12 read page 13
one 2.5l has a special machined sensor that fits with out adjustment. if you read that page 13, it covers a/t and m/t
rules. (2 engines, 2 trans) rules.
and if you buy autozoned parts,they will sell you that wrong part
toss 4 sided coin bam fail.
One sensor has glued paper sensor gapper, that must be used.
see>?
CKP have gaps that must be correct. keep that in mind and all works out. via the FSM.
all none HALL sensors are like this, (tuned with a gap)]
only how done varies.
heat soaked loss of spark
can be a bad sensor.
very common.
best scan a dead engine,first
and end the guessing, now.
the ASD dropping out cranked
is has 6 to 8 causes;
amazing the scan tool reports all.
https://www.jeepdied.com/ASD.html
on guy here , not wanting to scan it
stripped down the ASD relay so he could see it (with new spark i pocket sure.
desperate.
and cranked,
then saw it drop out mid cranking session
oops,, no scan tool, 8 reasons.
tis a fact.
no scan too, no joy, most the time.
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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: 1989 wrangler 2.5L won't turn off with new switch
Hi there:Bad installing or a problem with the connections.
The most likely problem is a bad ignition switch. To find out for sure, remove the plastic covers over the steering column and remove the 2 screws holding the ignition switch in place. Make sure the mechanism coming from the key is turning the ignition switch. If the mechanism works fine, replace the ignition switch.
I would suggest removing the ignition switch and checking the mechanism in the column to make sure it is actually turning the ignition switch off.
You could have a wiring problem, you will have to follow all the wiring from the ignition switch down the column and into the harness, there is sure to be a short in the wiring harness, that is if as you said you replaced the ignition switch for a new one.
To test this, remove the plastics around the steering column and pull out the wiring plug to the ignition switch, if the ignition turns off you have another faulty ignition switch if it stays on wiring harness has shorted out.
Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.
Thank you for using FixYa, have a nice day.
SOURCE: 92 wrangler wont start
Jiggle the wire connectors going in to the computer under the hood -- first check battery cables/terminal connections at battery -- beleive it or not, connection could SEEM good because you get crank & lights, but if it's faulty, loose, engine won't start - computer requires good solid voltage flow.. next check a fusible link very close to the battery off of the positive cable. check fusible link carefully. this could cause your problem for sure.
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