Electrical Problem cranks but won't start

Asked by Guru6H4Q5 Mar 22, 2020 at 05:44 AM

Question type: Maintenance & Repair

Hi. I have a 2007 Ford Bantam Rocam. It
cranks but won't start. I discovered that I
might have some electrical problems with
the ignition system. I tested both the crank
and Cam sensors using a multimeter.  I first
tested resistance and both sensors are
within spec. I then tested for voltage on the
connectors. Crank sensor voltage is 5V
connector unplugged. Cam sensor is 0.05V
connector unplugged. Crank sensor is
300mV connector plugged and Cam sensors
is 0V connector plugged. I then checked for
AC voltage. With engine cranking Crank
sensor produced 100mV and Cam sensor
0V.  Crank sensor is working fine as I do get
spark and injection Pulse. I checked for a
short to ground on the camshaft sensor
wiring and there's no short.  Both sensors
are brand new bought from Ford. Should I
get 5V on Cam sensor connector?

1 Answer
16,485

Guru97FK8 answered 4 years ago

If the engine is cranking , but not starting with the key, Check the amperage draw on the started cable. Check also the started selonoid cable position. This starter selonoid cable normally runs right next to the Crank angle sensor wiring. The higher voltage from the seloniod cable will induce a higher voltage and effect the signals in the Crank angle sensor wires. Separate the starter selonoid cable from the CKP sensor wires. Move it away from the CKP sensor wires.

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