The engine cranks but does not start, no Pulse at coils?

Tiny
PECAN
  • MEMBER
  • 2005 NISSAN ALTIMA
  • 2.5L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 180,000 MILES
Crank no start no pulse at coils.
Thursday, May 16th, 2024 AT 9:17 PM

2 Replies

Tiny
PECAN
  • MEMBER
  • 4 POSTS
Getting no pulse at coils.
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Friday, May 17th, 2024 AT 11:45 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,504 POSTS
Hi,

The first thing I suggest is this. If you have a live data scan tool, see if there is an RPM signal when cranking. Or see if the tachometer moves at all when cranking. If there is no RPM signal, suspect a faulty crankshaft position sensor.

This sensor is located slightly behind and above the starter. I attached a pic below.

If that isn't the issue, we need to check for power. Each coil will have a red wire at connector pin 3. With the key in the run position, confirm there is battery voltage at those wires and let me know what you find.

Let me know.

Joe

See pics below.
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Friday, May 17th, 2024 AT 8:30 PM

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