Hydra
Sponsored by:
Sponsored by:

New FMII hydra 2.5 user - some questions

 
Old 02-22-2018, 10:56 AM
  #1  
Newb
Thread Starter
 
Join Date: Jan 2018
Posts: 3
Total Cats: 0
Default New FMII hydra 2.5 user - some questions

I recently bought a '98 miata NB with an FMII kit including a hydra 2.5 ECU which was installed in '11. It had the FM injectors, exhaust and GT2560 turbocharger. So far I am enjoying it immensely, but as you might have guessed there are a few minor issues .

ISC
When I got it the idle speed dipped quite far below setpoint, to the point it would almost stall every time idle control kicked in. Using information from this forum I managed to get rid of the dips, but now my idle speed is a bit high (~1500rpm). I've been tinkering with the PID settings but have not yet managed to get it to play nice.

What isc PID settings are you using?

Check Engine light
Also, my check engine light does not light up on key on. Should it? I'm a bit worried the check engine light does not work at all..

Basic ECU settings
The previous owner said he had tinkered with various settings in the ECU, and I am not convinced that the changes he made are for the better. If anyone had a template.s20 file as it came from Flying Miata back in the day I would really appreciate it if you could send me this file!
Bram van der Pol is offline  
Old 02-22-2018, 02:01 PM
  #2  
Junior Member
 
Join Date: Jul 2015
Location: Bremerton, WA
Posts: 440
Total Cats: 31
Default

Not too many people here use Hydra ECUs, so you aren't likely to get a whole lot of help. Doesn't FM provide support for their kits even after change of ownership?
Itty is offline  
Old 02-22-2018, 02:04 PM
  #3  
Elite Member
 
codrus's Avatar
 
Join Date: Mar 2007
Location: Santa Clara, CA
Posts: 4,513
Total Cats: 541
Default

I believe FM will provide support to a second owner of a Hydra for a one-time fee. That's probably your best choice.

I had a 2.5 Hydra, and idle control was never very good even at its best. I don't remember whether or not it lit the CEL at key on.

--Ian
codrus is offline  
Old 02-22-2018, 03:14 PM
  #4  
Newb
Thread Starter
 
Join Date: Jan 2018
Posts: 3
Total Cats: 0
Default

Thanks for the replies guys. I already got the idea that the hydra is kind of a niche product, as little information is availible on the internet. For now it does the job, so I don't plan on replacing it anytime soon. As I view it as a project car and it's not my daily driver I can live with some imperfections. As long as it puts a smile on my face when I apply the throttle it's fine .

If I run into more serious issues going the FM support route is a nice option, thanks for the suggestion. I might send an email to FM support to ask about the fee.

Out of curiosity, what do people run these days? From my limited, mostly googled together knowledge I would suspect Megasquirt? (I briefly looked in to MS2 on custom boards while I was looking to buy a miata).
Bram van der Pol is offline  
Old 02-22-2018, 03:18 PM
  #5  
VladiTuned
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 35,211
Total Cats: 3,173
Default

Hydra is trash. Most of us use megasquirt. MS3
18psi is offline  
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
MechE
Prefabbed Turbo Kits
11
08-20-2015 10:06 AM
97miatanola
Prefabbed Turbo Kits
23
05-20-2014 03:23 PM
MrStevo
Prefabbed Turbo Kits
17
03-21-2011 04:18 PM
Senor Aguas
Meet and Greet
12
06-12-2010 09:54 PM
posidon42
DIY Turbo Discussion
5
12-09-2007 02:32 PM


Thread Tools
Search this Thread
Quick Reply: New FMII hydra 2.5 user - some questions


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.