No spark in the spark
Hi Marco:
You will have to prove out the wiring to make sure there are no shorts,
opens, or poor connections. If there are no wiring problems, then the
EEC may be at fault. The crank sensor produces an AC voltage signal that
may be getting corrupted by the time it reaches the ignition module,
due to bad wiring. Make sure to verify whether the ignition module is
receiving a clean strong signal by using an oscilloscope or at least
measure the signal with an AC voltmeter at the ICM connector while
cranking the engine. The voltage will vary with speed, you are looking
for a steady signal that doesn't drop out or become erratic. You can run
new wires, and make sure they are not connected to possibly shorted
sections of the old wiring, by cutting the old wires off at the
connectors and connecting new wires to the cut ends. Or replace the
connectors and wiring if you suspect that the connections are bad.
Inspect carefully for damaged terminals that won't make a good tight
connection with their mating pins when connected.
Here is a
basic diagram of the entire system, it is common to all the
distributorless units even though this one shows a 6-pack coil.
Zoom Image link HERE.
First
I sugest to check to see if the check engine light comes on key on
engine off. Chekc the EEC Power relay in the fuse box switch with
another relay (underhood fuse box, called PCM power relay). Check ground
connectiosn.
Zoom Image link HERE.
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.
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