No fire

Tiny
NATSLACK
  • MEMBER
  • 2006 CADILLAC DTS
  • 4.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 52,000 MILES
Suddenly will not fire at all. Has 55 psi on fuel rail. I have twelve volts DC and ground on coil pack. No codes on my Innova 3140g tool. I replaced cam position sensor and did not help.
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Sunday, January 21st, 2018 AT 8:35 AM

3 Replies

Tiny
PATENTED_REPAIR_PRO
  • EXPERT
First of all, I see the 2006 Cadillac DTS had a 4.6l engine, not a 4.3l.
Second of all, check your fuel injector fuse/s.
If you have any starting fluid, see if the engine will start and run for a few seconds after spraying a few shots of starting fluid into the throttle body.
If so, the ignition is fine and might be no injector voltage or no pulse.
If the fuel injectors do have voltage to them with the key on run and start then you may have either a blown PCM fuse or a faulty crankshaft position sensor and/or wiring, but I doubt that cause of no codes.
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Sunday, January 21st, 2018 AT 9:38 AM
Tiny
NATSLACK
  • MEMBER
I can smell gas after a couple times cranking. I do not know where the throttle body is but have 55 psi on fuel rail.
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Sunday, January 21st, 2018 AT 10:37 AM
Tiny
PATENTED_REPAIR_PRO
  • EXPERT
It is at the front of the intake manifold, shown in this diagram with a large round opening. You may have to remove the air cleaner in order to spray starting fluid into it, but if you do smell gas and it is still not starting, plus no codes meaning the ignition is working, then most likely the spark plugs are gas fouled. Remove one and smell it, if it has a strong smell of gas, they most likely they all do, so remove them all and clean them off with some carburetor cleaner or that starting fluid, allow them to dry for five minutes or so and put them all back in and try again.
Unless you want to confirm first of all that you do have spark on at least one cylinder.
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Sunday, January 21st, 2018 AT 11:00 AM

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