HELP! Car Wouldn't Start After Motor Swap - Need Reflash?
#1
HELP! Car Wouldn't Start After Motor Swap - Need Reflash?
My Z is/was a 2003 Touring, ATI procharged with an Osirus tune. I just got another motor (also from a 2003 Z) swapped into my car. I won't get into details as to why since it's another long story. The issue now is that my car would not start. It cranks but there's no spark. So we're suspecting that the ECU is what is stopping the car from starting. All sensors are checked and even swapped to brand new ones. From what I was told from a few experienced shops is that a reflash is sometimes necessary especially when the year of the motor and the car itself don't match.
Couple questions...
1. Any idea besides ECU and sensors?
2. If ECU does need a reflash, only dealership could do it I believe?
3. If I get a ECU reflash, I'd lose my osirus tune since the data is stored in the ECU?
4. If I have Osirus tune done at one shop previously, does the license transfer to another shop?
HELP!
Couple questions...
1. Any idea besides ECU and sensors?
2. If ECU does need a reflash, only dealership could do it I believe?
3. If I get a ECU reflash, I'd lose my osirus tune since the data is stored in the ECU?
4. If I have Osirus tune done at one shop previously, does the license transfer to another shop?
HELP!
#7
Here's an update. So towed the car to Nissan and they reprogrammed the BCM? But the car's still not firing up. It's cranking and trying to start but it just would not fire up. While the car was at Nissan, the tech was able to get some read when the car was attempting the start and the timing was at -7 which is supposed to be WAYYY off. He said that could be the reason.
1. Does that -7 timing during crank mean anything at all? Variables fluctuate so I'm not sure if that really is the issue. The seller of the motor basically swore by his motor that it was running 100% before it was pulled with no issue.
2. Is the timing completely controlled mechanically or it has something to do with tune (keep in mind I am supercharged and running Osirus tune)?
3. Mechanic is gonna check coilpacks and spark plugs again to verify that there is spark. Any other suggestions?
4. Could someone let me punch him in the face just because?
1. Does that -7 timing during crank mean anything at all? Variables fluctuate so I'm not sure if that really is the issue. The seller of the motor basically swore by his motor that it was running 100% before it was pulled with no issue.
2. Is the timing completely controlled mechanically or it has something to do with tune (keep in mind I am supercharged and running Osirus tune)?
3. Mechanic is gonna check coilpacks and spark plugs again to verify that there is spark. Any other suggestions?
4. Could someone let me punch him in the face just because?
Trending Topics
#8
Registered User
iTrader: (1)
Make absolutely sure the flywheel is aligned properly. There's notches along the edge which trigger the crank sensor and control timing. If it's not clocked correctly it will run poorly or not at all. Common mistake for mechanics unfamiliar with VQ's. Giving clutch jobs to the new guy and watching them pull the trans again afterwards is like a hazing ritual at dealers LOL.
Last edited by djamps; 10-21-2012 at 11:36 PM.
#14
Registered User
Join Date: May 2015
Location: Bradenton, FL
Posts: 38
Likes: 0
Received 0 Likes
on
0 Posts
Make absolutely sure the flywheel is aligned properly. There's notches along the edge which trigger the crank sensor and control timing. If it's not clocked correctly it will run poorly or not at all. Common mistake for mechanics unfamiliar with VQ's. Giving clutch jobs to the new guy and watching them pull the trans again afterwards is like a hazing ritual at dealers LOL.
#16
Registered User
Join Date: May 2015
Location: Bradenton, FL
Posts: 38
Likes: 0
Received 0 Likes
on
0 Posts
#17
New Member
iTrader: (6)
Easy way to check you flywheel position... unplug the crank sensor. If the motor fires up, but in limp mode, the flywheel is off. If it doesn't fire, that's not your problem.
Thread
Thread Starter
Forum
Replies
Last Post
etkms
Engine & Drivetrain
29
06-19-2022 06:30 PM
lolwatbro
Maintenance & Repair
9
10-09-2021 04:58 AM
SpartanZ32
Zs & Gs For Sale
4
10-22-2015 09:36 AM