nachospizza

iTrader: (1)

HI guys I need some help! My Z is the year 2004 Automatic Trans and once in a while I will have problems cranking it at startup! I need to crank two or three times to start the car! Recently I have replace both left and right side Camshaft Positions sensors, Both fuel return presurre dampers, new crankshaft sensor, new coils and oil change! But the problem still exist! I also recently installed the UR pulleys! Could you guys tell me what's the problem that causing me having the cranking problem? Thanks!

huyrua

iTrader: (30)

How old is the battery? Have you scan for error codes?

nachospizza

iTrader: (1)

The battery is only 11 months old going to be one year! Recently fixed the P0306 code due to bad coil pack or the coil harness!!! Replace both too! Couple days ago when I try to crank it up it just keep cranking til it stop and a loud noise of metal turning sound... today in the morning crank up fine... after a half an hour drive stop wait for gf pick her up crank up fine... then went to shopping mall parked for three hours came back to crank the Z up it takes two crank again to start it!!!

briin79

saw u onyl have 16 posts. if you find the answer make sure to post the resolution to help future people with these problems. I dunno myself what it could be.

Vivid Racing

iTrader: (67)

Sounds like your flywheel may be broken. If you need a new one, let me know.

BipJip

sound like a fuel filter problem, normaly if the filter is getting pluged it works intermitaly. i.e. starts fine than causes problems later.

Vivid Racing

iTrader: (67)

OP mentioned a metallic sound while cranking the engine. That's what made me think flywheel issue. It could be a fuel pressure issue as well.

JERZ350

iTrader: (2)

Sounded like a personal issue...

nachospizza

iTrader: (1)

Thank you for your reply! I am actually living in Hong Kong and I don't get on the forum that often... I sure will post the resolution on this forum for future people who need information regarding this issue!

nachospizza

iTrader: (1)

So do you mean the fuel filter is dirty causing cranking problem? Should I replace the fuel filter and also the fuel pump together???

nachospizza

iTrader: (1)

It never gave me the metallic sound before but from all the parts I replaced. The final part I replace is the crankshaft sensor and it gave me this metallic sound three days ago in the morning after I crank it two times... the second time I keep cranking and it crank for like five seconds then it stop and the metal sound from the engine or transmission part!

So how expensive is the flywheel for my automatic trans Z? Also my Z is the right hand drive so does the flywheel same as the left hand drive?

Also what can cause the fuel pressure issue? Fuel Pump??? Kindly advice me thank you very much!

nachospizza

iTrader: (1)

Ummmm... I am sorry am I being rude? I want to apologize if I said anything offensive.

nachospizza

iTrader: (1)

I search the forum and read this link and their Z problems are like my Z... seems like BCM might be a problem? What do you guys think? Is it easy to replace the BCM??? Is it really expensive?

https://my350z.com/forum/maintenance...ing-car-2.html

huyrua

iTrader: (30)

^^^listen with a grain of salt. He is a vendor on this site and will diagnose your problem to sell parts for you to buy. He's here to make money.

huyrua

iTrader: (30)

He's being sarcastic.

huyrua

iTrader: (30)

I would check the battery leads for lose connections. I had the same problem when I changed my battery. The terminals were smaller then the leads.

nachospizza

iTrader: (1)

Thank you very much Huyrua!!! I am still searching for the solution and I see someone post a video in Youtube regarding the starting problem and he said it might be the NATS Antenna which I have no idea what is it.... mind checkout this video and tell me. And please forgive me if my English writing skill wasn't that great...

http://www.youtube.com/watch?v=Z3N_PoT3R9Q

Fitzys350z

iTrader: (1)

watching that vid I'm guesing its the immobilizer. take your time when putting your key in. wait a few seconds before starting it.

nachospizza

iTrader: (1)

Thanks! So you mean the Anti theft alarm system? Also yesterday when I drove for half an hour... park my Z... wait inside my Z for my gf for like half an hour, I crank it up again some weird thing happened my Z crankup but not like the normal powerful crank it crank like weak... crank up and the rpm was like really low and the car shudder shake while the engine was running weakly... I know something wrong so I shut it off for like 3 sec and crank up again it crank up normal and rpm went normal again!

Today it crank up fine in the morning! It is weird I wonder what's wrong??? Have replaced so many parts already!!!

JERZ350

iTrader: (2)

Nah I was only kidding, was a joke