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Pete, Technician
Category: Australia Car
Satisfied Customers: 27825
Experience:  Over 17 years diagnosing and repairing various model vehicles with some certifications and training.
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I have the exact same problem inconsistent cranking time

Customer Question

I have the exact same problem
inconsistent long cranking time required, sometimes 1 second, sometimes 10-15 seconds or anywhere in between, not consistent at all. had a p0335 ckp sensor code, sensor replaced, no different. same code came back on with the new sensor after codes were cleared. After a few more startups the MIL went off. Then a few more startups and p0340 cam sensor code came on aswell. Check cam and crank sensor waveforms. crank has +-24Volt sine signal at idle. Heard that a bad starter motor could disrupt cam or crank signals; so disconnected starter cables and used an external jumper battery for cranking, inconsistent long cranking was still present. Checked glow plugs were receiving power, changed fuel filter. Check fuel rail pressure variation, starts around 6Mpa, within 2-3seconds rises to 60
mPa, and when it starts up settles at 36MPa. Drops to 6Mpa within 3sec o
Submitted: 1 year ago.
Category: Australia Car
Expert:  Pete replied 1 year ago.
My name is ***** ***** I am a professional here at Just Answer. I noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.
My info is limited on your model here but I see no one else has responded and thought I would see if I can help here.
In some cases this type of fault here can be caused by a timing component fault.If you have not had the timing components inspected to see if there is a worn component this should be done.I would also have the cam and crank sensor wiring checked for any faults and repaired as needed.
Thanks Pete