Car won't start .......
Thread Starter
Intermediate
Joined: Nov 2008
Posts: 26
Likes: 0
From: Brooklyn NY
Car won't start .......
I went to start my 2008 c6 and there is plenty of power but will not kick in like it's not getting fuel. Any suggestion on what it might be. Don't want to have to flatbed it to a mechanic if it's a simple fix.
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Joined: Jun 2001
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From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
air gas and spark.
You got air.
Do you hear the fuel pump prime?
If yes, I wonder if there is a fuse for the injector circuit?
You got air.
Do you hear the fuel pump prime?
If yes, I wonder if there is a fuse for the injector circuit?
Thread Starter
Intermediate
Joined: Nov 2008
Posts: 26
Likes: 0
From: Brooklyn NY
Yes I hear the fuel pump priming but I'm not a mechanic and don't know where the fuses are but will check the engine now for fuse box. Just trying to avoid having to have the car flatbed transported to a mechanic shop and doing damage to the new ZR1 kit I just had installed. Thanks for the suggestion.
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Joined: Jun 2001
Posts: 18,599
Likes: 3,954
From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
I found this in my Helms DVD:
Elmer
Circuit/System Testing
Crank the engine for 15 seconds.
Observe the vehicle DTC information with a scan tool.
⇒ If any DTCs are set, then repair those DTCs first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
With the ignition ON and the engine OFF, test the fuses that are supplied ignition 1 voltage by the powertrain relay. The test lamp should illuminate ON for each test point of the fuses.
⇒ If the test lamp does not illuminate on, for at least one test point of each fuse, refer to DTC P0685, P0689, or P0690 .
Crank the engine for 15 seconds. Observe the engine speed parameter with a scan tool.
⇒ If engine RPM is not indicated, refer to DTC P0335 or P0336 .
Install a spark plug tester onto one ignition module/coil assembly, on each bank of the engine.
Observe both spark plug testers.
Important: An erratic or weak spark is considered a no spark condition.
Crank the engine for 15 seconds. The ignition coil secondary voltage should be observed across the gap of both spark plug testers.
⇒ If the ignition coil secondary voltage is not observed, is inconsistent, or weak on either spark plug tester, refer to Electronic Ignition (EI) System Diagnosis .
With the ignition ON and the engine OFF, command the fuel pump ON and OFF with the scan tool. The fuel pump should energize when commanded ON, and de-energize when commanded OFF.
⇒ If the fuel pump does not turn ON and OFF, refer to Fuel Pump Electrical Circuit Diagnosis .
Turn OFF the ignition.
Install the J 34730-1A . With the ignition ON and the engine OFF, command the fuel pump ON several times with the scan tool. Refer to Fuel System Diagnosis for the fuel pressure specification.
Inspect for the following conditions:
• Compare the actual engine coolant temperature to the ECT parameter
• Filter and air intake system for restrictions and obstructions
• Test the fuel for contamination--Refer to Alcohol/Contaminants-in-Fuel Diagnosis .
• Inspect the spark plugs--Refer to Spark Plug Inspection .
• Test the exhaust system for restrictions--Refer to Restricted Exhaust .
• Engine mechanical conditions, such as worn timing chain, sprocket gears, low compression, etc--Refer to Symptoms - Engine Mechanical .
Crank the engine for 15 seconds.
Observe the vehicle DTC information with a scan tool.
⇒ If any DTCs are set, then repair those DTCs first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
With the ignition ON and the engine OFF, test the fuses that are supplied ignition 1 voltage by the powertrain relay. The test lamp should illuminate ON for each test point of the fuses.
⇒ If the test lamp does not illuminate on, for at least one test point of each fuse, refer to DTC P0685, P0689, or P0690 .
Crank the engine for 15 seconds. Observe the engine speed parameter with a scan tool.
⇒ If engine RPM is not indicated, refer to DTC P0335 or P0336 .
Install a spark plug tester onto one ignition module/coil assembly, on each bank of the engine.
Observe both spark plug testers.
Important: An erratic or weak spark is considered a no spark condition.
Crank the engine for 15 seconds. The ignition coil secondary voltage should be observed across the gap of both spark plug testers.
⇒ If the ignition coil secondary voltage is not observed, is inconsistent, or weak on either spark plug tester, refer to Electronic Ignition (EI) System Diagnosis .
With the ignition ON and the engine OFF, command the fuel pump ON and OFF with the scan tool. The fuel pump should energize when commanded ON, and de-energize when commanded OFF.
⇒ If the fuel pump does not turn ON and OFF, refer to Fuel Pump Electrical Circuit Diagnosis .
Turn OFF the ignition.
Install the J 34730-1A . With the ignition ON and the engine OFF, command the fuel pump ON several times with the scan tool. Refer to Fuel System Diagnosis for the fuel pressure specification.
Inspect for the following conditions:
• Compare the actual engine coolant temperature to the ECT parameter
• Filter and air intake system for restrictions and obstructions
• Test the fuel for contamination--Refer to Alcohol/Contaminants-in-Fuel Diagnosis .
• Inspect the spark plugs--Refer to Spark Plug Inspection .
• Test the exhaust system for restrictions--Refer to Restricted Exhaust .
• Engine mechanical conditions, such as worn timing chain, sprocket gears, low compression, etc--Refer to Symptoms - Engine Mechanical .
Moderator emeritus
Joined: Jun 2001
Posts: 18,599
Likes: 3,954
From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
Hearing the pump is good but you might need to actually have a gauge on the fuel rail to see if the pressure is actually coming up.
I'm out of ideas on this. Sounds like a flat bed run might be in your future.
Elmer
I'm out of ideas on this. Sounds like a flat bed run might be in your future.
Elmer
Thread Starter
Intermediate
Joined: Nov 2008
Posts: 26
Likes: 0
From: Brooklyn NY
I did ZMax treatment about 2 months ago, do you think that could have anything to do with this? I think your right about the flatbed thing and thank you for trying to help, appreciated.
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Moderator emeritus
Joined: Jun 2001
Posts: 18,599
Likes: 3,954
From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
Elmer
