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Discussion Starter · #1 ·
1998 Regal GS 3.8 Supercharged
Replaced fuel pump, crank sensor, cam position sensor
Tried swapping PCM from a Pontiac Grand AM.

I found a broken pink wire that runs from the fuze box, behind the radiator, and up to the engine (to the fuel injectors, I believe). I'm wondering if it could have damaged my PCM.

I have spark and fuel up to the rails. Stuck a test light on injectors and tried to start... light not pulsating. No signal being sent to injectors. I wonder why.

ANY SUGGESTIONS?
 

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Important: Before proceeding with this diagnostic Table, ensure that the vehicle battery is fully charged.

Important: If any DTCs are stored as failed since code clear, diagnose the DTC(s) before continuing with this table.

Check the fuses which supply ignition positive voltage to the following components:
  • Electronic ignition control module.
  • Fuel injectors.
  • If either fuse is blown, locate and repair the short to ground in the affected ignition positive voltage circuit.
  • Was a problem found?
If NO

  1. Turn the ignition switch to the OFF position.
  2. Install a fuel pressure gauge at the fitting on the fuel rail.
  3. Turn the ignition switch to the ON position.
  4. Observe the fuel pressure gauge.
Is the fuel pressure 48-55 psi and holding?
If NO Diagnose the fuel pump Issue

If Yes go to the next step

  1. Turn the ignition switch to the OFF position.
  2. Remove the fuel pressure gauge from the fuel rail.
  3. Install the scan tool.
  4. Turn the ignition switch to the ON position.
  5. Select the Engine Data 1 display on the scan tool.
  6. Observe the engine RPM while cranking the engine.
Does the scan tool indicate an engine RPM?
I would have to say YES because you have spark -- Correct?

If yes from above then
  1. Turn the ignition switch to the OFF position.
  2. Disconnect all of the fuel injector connectors.
  3. Turn the ignition switch to the ON position.
  4. Observe the fuel injector test light when installed in each injector connector.

Was the injector test light ON for any of the injectors?

NO correct

Then if NO above go to this step

  1. Leave the fuel injector connectors disconnected.
  2. Leave the injector test light installed in the injector connector.
  3. Observe the injector test light while cranking the engine (repeat for each injector
Did the injector test light blink for any of the injectors?

NO Correct

If no go to this step

  1. Leave the fuel injector connectors disconnected.
  2. Turn the ignition switch to the ON position.
  3. Connect a test light to ground.
  4. Probe the ignition positive voltage feed circuit to each injector connector.
If NO then you need to find the issue with the power circuit.
If YES then go to the next step

then check for DTC P1626 Theft Deterrent Fuel Enable Signal Not Received
 

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If it did you would think that it would run on the other 5 cylinders.

Do you have power going to the injectors?
 

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Discussion Starter · #6 ·
no power to injectors

The test light isn't pulsating when I try to start it. No power at the injectors. I found a broken wire behind the radiator fill inlet. It was pink wire going up to injectors.
 

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Discussion Starter · #7 ·
I was wondering if when the wire grounded out could this have damaged my pcm?

I just read something about security relearn procedure. Before I found the broken wire, I dicsconnected the pcm. I swapped ffor a pontic pcm (no luck) then I put the old one back in (then I found broken wire)
 

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The test light isn't pulsating when I try to start it. No power at the injectors. I found a broken wire behind the radiator fill inlet. It was pink wire going up to injectors.
Do you have power on the pink wire at the injectors while the other end goes to ground?
 

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I was wondering if when the wire grounded out could this have damaged my pcm?
The PCM is very hard to kill and you need to check for DTC's
 

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Is the VATS system shutting off the fuel injectors?
Checking DTC's with a scanner will tell you that
 
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