Duramax Engine Swap
I need some help I traded out my motor with a like one both are 2003 6.6 still using my eletronics and computers now it wont start any one have and idea? Iam broke down in oklahoma.
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what exactly is it doing?
does it crank over? does it attempt to start at all? are you getting fuel as far as the fuel filter? have you rechecked all of your connections? any downloaders or anything like that installed? do you have a security light flashing? :hi: welcome to the forum. sorry to have to meet under these circumstances. :c: |
The motor came out of a 2003? out of wisconson and mine is a 2003 out of california. We have checked the crank and cam sensors and it seems good we are using the electrics from the california modle. It does crank but does not start at all. been all over the install and all seems right.dont know what you mean by down loaders? Does any one know weather the computer has to be reset by dealer? Thanks DAVE
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Engine Cranks but Does Not Run
Circuit Description The Engine Cranks but Does Not Run diagnostic table is an organized approach to identifying a condition that causes an engine not to start. The Engine Cranks but Does Not Run diagnostic table directs the service technician to the appropriate system diagnosis. The Engine Cranks But Does Not Run diagnostic table assumes the following: • The batteries are completely charged. Refer to Battery Inspection/Test in Engine Electrical. • The cranking speed is within specifications. Refer to Engine Cranks Slowly in Engine Electrical. • There is adequate fuel in the fuel tanks. Diagnostic Aids If the cause of an engine cranks but will not run condition has not been found, inspect for the following conditions: • Hard starting only in cold ambient temperatures. These may cause an intermittent condition that may not occur in the service bay: - Fuel heater inoperative, refer to Fuel Heater Inoperative . - Ice blockage at the fuel pickup in the fuel tank. This will be a high vacuum in the supply lines while cranking, and the problem will disappear after the vehicle is brought in the service bay. It may also exhibit a start and stall condition or a starting condition with no acceleration. • The correct cranking speed is 100 RPM cold and 180 RPM hot. A scan tool can be used to inspect cranking speed by pulling the ignition 1 relay and monitoring engine speed on the scan tool while cranking. • Water or foreign material in fuel system • A basic engine problem • If the crankshaft position (CKP) sensor and the camshaft position (CMP) sensor are disconnected or malfunctioning at the same time, an Engine Cranks But Does Not Run condition will exist. Test Description The numbers below refer to the step numbers on the diagnostic table. 5. This step tests for an ignition 1 voltage supply to the engine control module (ECM). 6. This step tests the 12-volt reference circuit to the CKP sensor and the CMP sensor. The 12-volt reference circuit for the CKP sensor and the CMP sensor is connected internally within the ECM. If the 12-volt reference circuit is shorted to ground, the engine will not start and no engine speed will be indicated on the scan tool. 7. If there is fuel in the engine oil, fuel may be leaking from the fuel injector or fuel injection pump into the crankcase. 8. If the fuel system will not even briefly prime to 10 psi and will not start, the check valve in the fuel filter/heater element housing is stuck open. 9. This step determines if the fuel system is bleeding down causing a no start. The fuel pressure will slowly drop to 0 psi, but should still be above 8 psi 10 seconds after pressurizing the fuel system. 11. This step determines if the problem is a stuck open or broken fuel injector. If fuel vapors come out of any of the glow plug holes, excessive fuel is being sent into a cylinder, and not being distributed to all of the fuel injectors. 12. The engine will not run without an actual fuel rail pressure more than 10 MPa (1,450 psi). 14. If the no-start condition takes place in cold operating temperatures, 2-4°C (35-40°F) or colder, a glow plug system failure may cause the no-start condition. 17. In some cases, no compression, possibly with excessive fuel, in a single cylinder can cause a no start 1- Did you perform the Diagnostic System Check - Engine Controls? yes-Go to Step 2 no-Go to Diagnostic System Check - Engine Controls 2- 1. Turn On the ignition, with the engine OFF. 2. Observe the DTC Information with a scan tool. Does the scan tool display DTC P0090, P0335, P0336, P0340, P0370, P0374, P0380, P0601, P0602, P0603, P0604, P0611, P0612, P1621, P1626, P1631, P1683, or U1800? yes-Go to Diagnostic Trouble Code (DTC) List no-Go to Step 3 3- Is the customer's concern with a fuel smell or fuel leak? yes-Go to Fuel Leaks no-Go to Step 4 4- Observe the Actual Fuel Rail Pressure parameter with a scan tool. Is the pressure within the specified range? 1-1.8 MPa yes-Go to Step 5 no-Go to Step 18 5- Observe the Ignition 1 signal parameter with a scan tool. Is the Ignition 1 signal parameter at the specified value? B+ yes-Go to Step 6 no-Go to Step 24 6- 1. Attempt to start the engine. 2. Observe the Engine Speed parameter with a scan tool while the engine is cranking. Is the Engine Speed parameter more than the specified value? 0 RPM yes-Go to Step 7 no-Go to Step 19 7- Inspect for the following conditions: • Excessive fuel in the engine oil--Refer to Fuel in Engine Oil in Engine Mechanical. • Contaminated Fuel--Refer to Contaminants-in-Fuel Diagnosis . Did you find and correct the condition? yes-Go to Step 34 no-Go to Step 8 8- 1. Install the J 44638 Vacuum Gage to the fuel system service port on the right front side of the engine. 2. Attempt to hand prime the fuel manager 30 times or until the specified pressure is reached. Can you prime the system to the specified value? 8 psi yes-Go to Step 9 no-Go to Step 31 9- Does the pressure measure more than the specified value for more than 2 minutes? 2 psi yes-Go to Step 10 no-Go to Step 13 10- Perform the Engine Compression Test. Refer to Engine Compression Test in Engine Mechanical - 6.6L. Repair the engine as necessary. Did you find and correct the condition? yes-Go to Step 34 no-Go to Step 11 11- Did any of the cylinders emit any fuel vapor during the Engine Compression Test? yes-Go to Step 28 no-Go to Step 12 12 1. Crank the engine for 15 seconds. 2. Observe the Actual Fuel Rail Pressure parameter with a scan tool. Is the Actual Fuel Rail Pressure parameter more than the specified value? 10 MPa (1,450 psi) yes-Go to Step 14 no-Go to Step 13 13 1. Reprime the fuel manager to 10 psi. 2. Attempt to start the engine while the prime is still above 8 psi. Does the engine start? yes-Go to Fuel System Diagnosis no- Go to Fuel System Diagnosis - High Pressure Side 14- Observe the Glow Plug System Type parameter with a scan tool. Is the Glow Plug System Type Federal? yes-Go to Step 15 no-Go to Step 16 15- Important: Repeat this procedure on both banks of the engine. This test may be repeated as many times as necessary. 1. Turn OFF the ignition. 2. Connect a test lamp to a glow plug harness connector and a good ground on one side of the engine. 3. Turn ON the ignition, with the engine OFF. Does the test lamp turn ON and OFF? yes-Go to Step 16 no-Go to Glow Plug System Diagnosis 16 Important: If there is high resistance in the signal or low reference circuits of the crankshaft position (CKP) sensor the Engine Speed parameter of the scan tool will display a value more than 0. It will not be an accurate measure of engine speed, and can cause an Engine Cranks but does Not Run condition. Test the CKP sensor signal and low reference circuits for high resistance. Refer to Circuit Testing in Wiring Systems. Did you find and correct the condition? yes-Go to Step 34 no- Go to Step 17 17 Inspect for the following conditions: • A plugged air filter • A collapsed air intake duct • The fuel heater is inoperative. If the customer concern is that the engine will not start when ambient temperatures are less than 2-4°C (35-40°F), refer to Fuel Heater Inoperative . • A restricted exhaust system--Refer to Symptoms - Engine Exhaust in Engine Exhaust. Did you find and correct the condition? yes- Go to Step 34 no- Go to Diagnostic Aids 18- 1. Disconnect the fuel rail pressure (FRP) sensor. 2. Observe the Actual Fuel Rail Pressure parameter on the scan tool. Does the Actual Fuel Rail Pressure parameter measure more than the specified value? 175 MPa yes-Go to Step 23 no- Go to Step 22 19. 1. Turn OFF the ignition. 2. Disconnect the CKP sensor. 3. Turn ON the ignition, with the engine OFF. 4. Probe the 12-volt reference circuit of the CKP sensor with a DMM connected to a good ground. Is the voltage more than the specified value? 10 Volts yes-Go to Step 29 no- Go to Step 20 20- 1. Turn OFF the ignition. 2. Disconnect the camshaft position (CMP) sensor. 3. Turn ON the ignition, with the engine OFF. 4. Probe the 12-volt reference circuit of the CMP sensor with a DMM connected to a good ground. Is the voltage more than the specified value? 10 Volts yes- Go to Step 30. no-Go to Step 21 21 Test the 12-volt reference circuit of the CKP sensor and the CMP sensor for a short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? yes- Go to Step 34. no-Go to Step 33 22- Test the FRP sensor signal circuit for a short to ground. Refer to Circuit Testing in Wiring Systems. Did you find and correct the condition? yes- Go to Step 34. No- Go to Step 33 23- Test the FRP sensor circuits for high resistance. Refer to Circuit Testing in Wiring Systems. Did you find and correct the condition? yes- go to step 34. no go to step 25 |
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1. Test the ignition 1 voltage circuit of the engine control module (ECM) for a short to ground, a high resistance, or an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. 2. Replace the fuse if necessary. Did you find and correct the condition? yes-Go to Step 34 no-Go to Step 26 25- Test for an intermittent or for a poor connection at the FRP sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? yes-Go to Step 34 no-Go to Step 32 26- 1. Clean and tighten the ECM shared ground. Refer to Power and Grounding Component Views in Wiring Systems. 2. Attempt to start the engine. Does the engine start? yes-Go to Step 34 no-Go to Step 27 27- Test for an intermittent and for a poor connection at the ECM. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? yes-Go to Step 34 no-Go to Step 33 28- Important: When the fuel injector pressure lines are removed, debris will fall on the fuel injector inlet fitting. Vacuum the debris from the area to prevent the debris from falling in the fuel injector. Replace the fuel injectors on the affected cylinders. Refer to Fuel Injector Replacement . Did you complete the replacement? yes-Go to Step 34 29- Replace the CKP sensor. Refer to Crankshaft Position (CKP) Sensor Replacement . Did you complete the replacement? yes-Go to Step 34 30- Replace the CMP sensor. Refer to Camshaft Position (CMP) Sensor Replacement . Did you complete the replacement? yes-Go to Step 34 31- Important: Before replacing the fuel filter/heater element housing, inspect the fuel vent screw for damage or cross threading. Replace the vent screw w/"O" ring if either condition is found. Replace the fuel filter/heater element housing. Refer to Fuel Filter/Heater Element Housing Replacement . Did you complete the replacement? yes-Go to Step 34 32- Replace the FRP sensor. Refer to Fuel Rail Pressure (FRP) Sensor Replacement . Did you complete the replacement? yes-Go to Step 34 33- Replace the engine control module (ECM). Refer to Engine Control Module (ECM) Replacement . Did you complete the replacement? yes-Go to Step 34 34- 1. Clear any DTCs with a scan tool. 2. Attempt to start the engine. Does the engine start and continue to run? yes-Go to Step 35 no-Go to Step 2 35- 1. Allow the engine to idle until normal operating temperature is reached. 2. Observe the DTC Information with a scan tool. Are any DTCs displayed? yes- Go to Diagnostic Trouble Code (DTC) List no-System OK |
that is the "cranks but doesn't fire" flow chart directly from GM. you should have no reason to reflash the PCM if you used the one that was originally in your truck.
by downloader i was asking if there was any aftermarket programming. bully dog, efi live, edge, banks, any of that stuff. do you have any way of scanning it? i'd bet there's a code in there somewhere that will help us help you. |
have it scanned for security and other codes and also bleed your injector lines.
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dont try to bleed your high pressure system 30,000 psi will screw you up and many other things. silly old school mechanical pump guys
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done it several times, just do it til it starts to get wet around the threads then tighten it back down. there is a priming button i believe on top of the fuel filter housing also. try that.
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Did you Get It Running?
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