Engine Cranks no Start

[mkyledoyle]

This tool would probably help diagnose the "no start" condition and does give some sensor info.
But you would still need a wiring diagram to know how the power and ground distribution are done in that car.

https://www.kirbanperformance.com/c...-coil-ignition-sensorcheck-module-7723/p44305

Thank you.
I have all of the wiring diagrams.

 

[mkyledoyle]

Here's where I am at. I will have the leads for my multi meter today so I can back probe the crank sensor. Aside from that, I have gone through the "No Start Tree" from Vortexbuicks. I end up at the end of step 3 "Spark on all" > Check for fuel wet spark plugs. If OK see "Diagnostic Aids" on facing page. I don't have the facing page.
I decided to go through the next steps on page two just to see if I could find anything unusual. I get to step 10 "Check Voltage between Cam Sensor harness terms B and C. Voltage should be 6-9 volts. Is it? It is not. It is only 5.01 volts. I follow the steps to number 11 "Check voltage from Cam Sensor harness terminal B to ground. Reading should be 6 to 9 volts. Is it? No it is not. It is only 5.01 volts. The flow doesn't cover a slightly low voltage situation. Do you think that matters?

 

[John Larkin]

I think 5 volts is the base voltage on those. TPS only gets 5 volts as I recall.

 

[John Larkin]

This is from gnttype.org:
CODE 42

Trouble Code 42 indicates that there may be a malfunction in the Electronic Spark Timing (EST) system.

During cranking, the timing is controlled by the ignition module while the ECM monitors the engine speed. When the engine speed exceeds 400 RPM, the ECM sends a BYPASS signal to the ignition module which switches the timing to ECM control. The ECM calculates what the timing should be then "tells" the ignition module via the EST circuit.

An open or ground in the EST circuit will stall the engine and set a Code 42. The engine can be re-started but it will run on ignition module timing.

The conditions for setting this code are:

• System in BYPASS mode but the ignition module is still controlling timing
  - or -
• Engine speed > 600 RPM with no EST pulses (ECM controlled timing) going to the ignition module for 200 msec.

Typical causes for this code include:

1) BYPASS line is open or grounded
2) EST line is open or grounded
3) PROM or CALPACK not seated properly in the ECM
4) Poor connections between ignition module and ECM
5) Poor routing of EST harness and/or poor quality ignition wires (EMI induced electrical noise)
6) Faulty or incorrect ignition module
7) Faulty ECM

ECM is the actual computer, not the ignition module. II would look there.