What is my next step?

Tiny
STUMPEDMECH
  • MEMBER
  • 1996 BUICK PARK AVENUE
  • 173,000 MILES
1996 buick park ave, wont start, has gas in the rail, has spark, but no pulse to injectors.
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Friday, August 26th, 2011 AT 6:11 PM

12 Replies

Tiny
JDL
  • EXPERT
What is the engine size? Check for rpm signal, comes from crank sensor. At the moment, I can't say that the crank sensor is faulty.
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Friday, August 26th, 2011 AT 6:51 PM
Tiny
STUMPEDMECH
  • MEMBER
Doesnt the crank sensor tell pcm when to spark too? So if it has spark that would mean sensor is ok right?
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Friday, August 26th, 2011 AT 7:31 PM
Tiny
JDL
  • EXPERT
It's a dual crank sensor. To answer your question, possibly. The crank sensor signals go to the ignition module. The computer has to see both sensor signals or it won't start. With a single signal crank sensor, where the signal goes to the ignition module, without that signal, no spark. I'm not sure about the dual crank sensor? With dual crank sensor, if either signal is lost, the vehicle won't start.

Any applicable codes? Usually the cost of a crank sensor is no where near the cost of ignition module. I haven't priced that dual crank sensor?

At the injectors, do you have voltage?
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Friday, August 26th, 2011 AT 7:51 PM
Tiny
STUMPEDMECH
  • MEMBER
Did have MAP sensor code but replaced and code went away. No voltage at injectors.
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Friday, August 26th, 2011 AT 8:01 PM
Tiny
JDL
  • EXPERT
The pink wire is voltage for injectors, fuse protected. Goes hot with the key on.
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Friday, August 26th, 2011 AT 8:08 PM
Tiny
JDL
  • EXPERT
Replacing the fuse may not fix it? Could have faulty wiring circuit or injector issue?
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Friday, August 26th, 2011 AT 8:17 PM
Tiny
STUMPEDMECH
  • MEMBER
No blown fuses at all one thing I could come up with would be replacing PCM.
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Friday, August 26th, 2011 AT 8:20 PM
Tiny
JDL
  • EXPERT
With the key on, use a voltage tester at the fuse leg, anything/voltage? If no voltage it isn't the pcm.
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Friday, August 26th, 2011 AT 8:30 PM
Tiny
STUMPEDMECH
  • MEMBER
13.1v at fuse leg for pcm/vats.
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Friday, August 26th, 2011 AT 8:58 PM
Tiny
JDL
  • EXPERT
Do you see the fuse in the diagram I posted? That is the one to check.

Does the starter crank?
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Friday, August 26th, 2011 AT 9:10 PM
Tiny
STUMPEDMECH
  • MEMBER
Got it taken care of that fuse blew again. Thanks for help take care
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Friday, August 26th, 2011 AT 10:01 PM
Tiny
JDL
  • EXPERT
How many times has that fuse blown? If it has blown several times, you need to find out what is causing that fuse to blow?
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Saturday, August 27th, 2011 AT 2:03 PM

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