Notices
General Miata Chat A place to talk about anything Miata

Crank no start odd situation

Old Nov 29, 2025 | 04:08 PM
  #1  
Joen337's Avatar
Thread Starter
Newb
 
Joined: Nov 2025
Posts: 3
Total Cats: 0
Default Crank no start odd situation

My 03 has an fm turbo that I installed myself over a year ago has been running good with no major issues since. A few days ago my crank bolt decided to snap off while on the highway taking my harmonic balancer, crank boss and timing wheel along with it. Since that debacle I was able to remove the remains of the crank bolt from the crank and replace all the lost parts. Now ive ran into another problem, the car cranks good but wont start. The car has spark and fuel, a known good cam sensor and a replaced crank sensor, as the old one was nicked by the balancer as it fell off. Ive already made sure the trigger wheel wasnt backwards, which its not. Ive scanned the ecu for codes there was a p0441 code for evap which I dont think was relevant, after clearing codes and letting car sit with battery unplugged no new codes posted. I attached a picture of my timing marks which seem to be in time to me. This car is testing my patience, does anyone have any recommendations/things to try before i send it to a shop for diagnosis which I would hate to do. Ill be happy to take any more pictures/videos if needed


Old Nov 29, 2025 | 04:34 PM
  #2  
curly's Avatar
Cpt. Slow
iTrader: (25)
 
Joined: Oct 2005
Posts: 15,199
Total Cats: 1,398
From: Oregon City, OR
Default

Take a video of it cranking and post it.
Old Nov 29, 2025 | 04:57 PM
  #3  
Joen337's Avatar
Thread Starter
Newb
 
Joined: Nov 2025
Posts: 3
Total Cats: 0
Default

Originally Posted by curly
Take a video of it cranking and post it.
Here it is cranking
Attached Files
File Type: mp4
20251129_164419~2.mp4 (15.08 MB, 9 views)
Old Nov 29, 2025 | 06:38 PM
  #4  
curly's Avatar
Cpt. Slow
iTrader: (25)
 
Joined: Oct 2005
Posts: 15,199
Total Cats: 1,398
From: Oregon City, OR
Default

It's been a while since I've messed with a bone stock NB2, but I would expect RPM to jump while cranking. Do you have an OBD2 reader to look at live data, and see if it's at ~200rpm while cranking?
Old Nov 29, 2025 | 06:42 PM
  #5  
olderguy's Avatar
AFM Crusader
iTrader: (19)
 
Joined: Oct 2004
Posts: 4,716
Total Cats: 364
From: Wayne, NJ
Default

29325779751_83f59f0ebb_b.jpg (1024×768)

Looks like timing belt not correct
Old Nov 29, 2025 | 06:53 PM
  #6  
curly's Avatar
Cpt. Slow
iTrader: (25)
 
Joined: Oct 2005
Posts: 15,199
Total Cats: 1,398
From: Oregon City, OR
Default

Oh yeah, that should be E to E, and I to I, although VVT won't have I on the VVT sprocket.

More importantly when you zoom out, #1 cam lobes should be pointing away from each other at 9 (I) and 3 o'clock (e).

Old Nov 30, 2025 | 04:05 PM
  #7  
Joen337's Avatar
Thread Starter
Newb
 
Joined: Nov 2025
Posts: 3
Total Cats: 0
Default

Originally Posted by curly
Oh yeah, that should be E to E, and I to I, although VVT won't have I on the VVT sprocket.

More importantly when you zoom out, #1 cam lobes should be pointing away from each other at 9 (I) and 3 o'clock (e).

that did the trick, embarrassing rookie mistake. Thanks for the help!
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
theyeroc
MEGAsquirt
5
Mar 1, 2025 05:32 PM
just_a_mihawta
ECUs and Tuning
1
Jul 7, 2021 11:03 PM
psyber_0ptix
MEGAsquirt
42
Jun 5, 2017 12:51 AM
Shinjitago
Engine Performance
5
Dec 20, 2015 12:23 PM
AbeFM
ECUs and Tuning
22
Jan 3, 2010 10:23 AM


Thread Tools
Search this Thread

All times are GMT -4. The time now is 05:28 PM.