G35 runs without crankshaft sensor
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G35 runs without crankshaft sensor
I replaced both cam sensors and the crankshaft sensor due to my car taking 5 seconds to start and engine code p0335 after engine swap. I noticed my crankshaft sensor was bolted halfway into the transmission. I bolted the new crank sensor all the way in and the car starts normal but the car bogs and stalls a few seconds later. So, i took the new crank sensor out and re-bolted it halfway into the transmission, and my car runs normal. However, it takes 5 seconds to start everytime and check engine, vdc, and slip light is on. Does anyone know how can i fix this long start?
I can post videos later
I can post videos later
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Use only a Nissan CKP sensor, inspect the harness for damage. If you used anything other than an actual OEM Nissan sensor that's probably why it isn't working properly.
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Used z1 motorsports ckp, Where should i look for the damage on harness? I dont know how it could be the harness if the car starts normally when the ckp is bolted all the way in. It just stalls when it is all the way in. Could it be the flywheel? How can a flywheel be misaligned?
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I think Z1 only sells authentic OEM crank sensors, there's still a slight chance yours is defective but I would start by removing the CKP and thoroughly inspecting it for any physical damage, scuffing/abrasions/cracks/obvious damage, make sure the harness still looks sealed and that it doesn't have any visibly damaged pins in the harness or the connector on the CKP.
Next, with the CKP removed look up into the hole where it reads the flywheel signal plate, do you see any debris accumulated near the edge of the hole? Turn the motor by hand at least one full rotation and inspect the entire diameter of the signal plate for any missing teeth or other damage.
If everything looks ok I would reinstall the CKP, clear the codes and try to start the motor again to see if the code comes back, codes like this will be stored for some time they don't just automatically fall off when the issue is gone, it might take a couple days for it to be removed on its own. Once it's manually cleared see if it comes back when you try to start the vehicle again.
How the system is designed to work, you turn the ignition key which sends signal to the ECM to close the ignition contact and power the starter motor. Simultaneously the ECM monitors the CKP sensor and if a signal is found the ECM closes the fuel pump relay and pressurizes the fuel system. While cranking, the ECM continues to monitor CKP to determine engine speed while simultaneously monitoring CAM position sensors and combines the data to open injectors and deliver spark at the proper moment.
Typically people experience problems like "won't crank = CKP sensor" or "cranks but won't start = CAM sensor or fuel pump failure". You definitely want the CKP properly installed, without proper signal the ECU will shut off fuel delivery.
You may be experiencing another failure as well, possibly the fuel pump and unfortunately there is no factory installed fuel port to measure pressure. Z1 does make a convenient sandwich adaptor for the passenger side fuel damper and you can either install a permanent gauge or a schrader valve, or both.
Next, with the CKP removed look up into the hole where it reads the flywheel signal plate, do you see any debris accumulated near the edge of the hole? Turn the motor by hand at least one full rotation and inspect the entire diameter of the signal plate for any missing teeth or other damage.
If everything looks ok I would reinstall the CKP, clear the codes and try to start the motor again to see if the code comes back, codes like this will be stored for some time they don't just automatically fall off when the issue is gone, it might take a couple days for it to be removed on its own. Once it's manually cleared see if it comes back when you try to start the vehicle again.
How the system is designed to work, you turn the ignition key which sends signal to the ECM to close the ignition contact and power the starter motor. Simultaneously the ECM monitors the CKP sensor and if a signal is found the ECM closes the fuel pump relay and pressurizes the fuel system. While cranking, the ECM continues to monitor CKP to determine engine speed while simultaneously monitoring CAM position sensors and combines the data to open injectors and deliver spark at the proper moment.
Typically people experience problems like "won't crank = CKP sensor" or "cranks but won't start = CAM sensor or fuel pump failure". You definitely want the CKP properly installed, without proper signal the ECU will shut off fuel delivery.
You may be experiencing another failure as well, possibly the fuel pump and unfortunately there is no factory installed fuel port to measure pressure. Z1 does make a convenient sandwich adaptor for the passenger side fuel damper and you can either install a permanent gauge or a schrader valve, or both.
Thread Starter
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Registered User
Joined: Jan 2018
Posts: 32
Likes: 1
I think Z1 only sells authentic OEM crank sensors, there's still a slight chance yours is defective but I would start by removing the CKP and thoroughly inspecting it for any physical damage, scuffing/abrasions/cracks/obvious damage, make sure the harness still looks sealed and that it doesn't have any visibly damaged pins in the harness or the connector on the CKP.
Next, with the CKP removed look up into the hole where it reads the flywheel signal plate, do you see any debris accumulated near the edge of the hole? Turn the motor by hand at least one full rotation and inspect the entire diameter of the signal plate for any missing teeth or other damage.
If everything looks ok I would reinstall the CKP, clear the codes and try to start the motor again to see if the code comes back, codes like this will be stored for some time they don't just automatically fall off when the issue is gone, it might take a couple days for it to be removed on its own. Once it's manually cleared see if it comes back when you try to start the vehicle again.
How the system is designed to work, you turn the ignition key which sends signal to the ECM to close the ignition contact and power the starter motor. Simultaneously the ECM monitors the CKP sensor and if a signal is found the ECM closes the fuel pump relay and pressurizes the fuel system. While cranking, the ECM continues to monitor CKP to determine engine speed while simultaneously monitoring CAM position sensors and combines the data to open injectors and deliver spark at the proper moment.
Typically people experience problems like "won't crank = CKP sensor" or "cranks but won't start = CAM sensor or fuel pump failure". You definitely want the CKP properly installed, without proper signal the ECU will shut off fuel delivery.
You may be experiencing another failure as well, possibly the fuel pump and unfortunately there is no factory installed fuel port to measure pressure. Z1 does make a convenient sandwich adaptor for the passenger side fuel damper and you can either install a permanent gauge or a schrader valve, or both.
Next, with the CKP removed look up into the hole where it reads the flywheel signal plate, do you see any debris accumulated near the edge of the hole? Turn the motor by hand at least one full rotation and inspect the entire diameter of the signal plate for any missing teeth or other damage.
If everything looks ok I would reinstall the CKP, clear the codes and try to start the motor again to see if the code comes back, codes like this will be stored for some time they don't just automatically fall off when the issue is gone, it might take a couple days for it to be removed on its own. Once it's manually cleared see if it comes back when you try to start the vehicle again.
How the system is designed to work, you turn the ignition key which sends signal to the ECM to close the ignition contact and power the starter motor. Simultaneously the ECM monitors the CKP sensor and if a signal is found the ECM closes the fuel pump relay and pressurizes the fuel system. While cranking, the ECM continues to monitor CKP to determine engine speed while simultaneously monitoring CAM position sensors and combines the data to open injectors and deliver spark at the proper moment.
Typically people experience problems like "won't crank = CKP sensor" or "cranks but won't start = CAM sensor or fuel pump failure". You definitely want the CKP properly installed, without proper signal the ECU will shut off fuel delivery.
You may be experiencing another failure as well, possibly the fuel pump and unfortunately there is no factory installed fuel port to measure pressure. Z1 does make a convenient sandwich adaptor for the passenger side fuel damper and you can either install a permanent gauge or a schrader valve, or both.
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