I have a plow on my jeep and as i drive it for work it shuts down and wont start i have to let it sit for about an hour befor it starts again there is no spark to the plugs
Which engine???????????????????????????
ASD is tricky on jeeps.
The Auto shutdown,relay.
what is it , how does it works is covered in the fsm. read it.
http://www.jeep4x4center.com/knowledge-base/index.htm?utm_source=cj#service
The ECU runs this RELAY, and if the ECU sees a gross error
it shuts this down, and the schematic there is clear as to what.
both spark and fueling.
here is what can drop it out.
1: crank sensor.
2: cam sensors or TDC ,etc.
3: sees spark dead or weak.
4: Immobilizer active. (failed)
as the book says , make sure spark is good for the 2 seconds cranking. (not after the 2seconds)
the ECU is programmed like this.
user cranks.
ECU creates spark,, using the crank/cam sensors at the time base
for 2 seconds
if the spark read back fails or the 2 sensors fail, the ecu shuts DOWN.
this is for fire prevention.
most other cars just cut the injectors, but not jeep
the drop the MAIN ASD relay.
using the check engine light flash codes, you can see which of the
3 failed, cranking for 5 second and releasing the key on all cars.
1996 and newer a scan tool is use to same effects.
now the 64,000 dollar qustion,
see page 8w-30-4
why does the ASD KILL THE IGNITION coil. easy.
1: it only guess it 2 seconds to make spark
2: if it cant,. it then drops the relay. killing fuel too.
3: this prevents the the crash and burn you see on TV.
so its 2 second permissive system. (or 3?) i forget exact seconds, its in then book and is short.
many dont know this. but is a fact.
now the flash codes.
crank for 5 seconds while in flash code mode
see emmisions page for how.
flash code 11 drops the ASD ! (cam or crank sensor dead)
code 54 cam signal dead?
code 43, spark bad.
SOURCE: 88 jeep starts sometimes
If you keep your tank under 1/2 rust can form on inside of the tank causing the fuel filter to get clogged. I'ld check that first. When your remove filter, if it's a rusty color gas that comes out, I'ld bet that's your problem.
SOURCE: no spark/wont start
i have a 98 and it has a distributor but it could be a fuel issue more than a spark if you have a fuel pressure gauge and check it.should be above 30 psi to me it sounds like a fuel pump thats bad
SOURCE: 89 jeep wrangler wont start
Sounds like the drainback valve inside the pump is shot...try just turning the key on and waiting a minute and see if it starts that way.
SOURCE: location of ignition module on a 96 jeep grand
96 Jeep Grand Cherokee wont start.Has fuel Press No spark.Poss Ignition Module?Cant Find location.
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