Msm Hydra 2.7 problems.. - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 11-24-2013, 06:16 PM   #21
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Update: I just received my ecu back from hydra. Turns out I burned the output for the wideband and also for tps. It's fixed now and I just got it plugged in my car and calibrated. But I'm having a bad idle problem when it starts it idles really high around 2.5k rpms then it lowers down and begins to bouce between 1300-2000 rpms.

I also ended up buying a NTK 24302 wideband after my old one fried..
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Old 11-25-2013, 12:50 PM   #22
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I've unplugged the the wideband and the car will finally idle normal. Did I buy the wrong replacement? I bought a 24302 ntk is the 24300 ntk the right one for the hydra 2.7? I also did splice the plug off my old flyin miata sensor and soldered it to my new sensor.
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Old 11-27-2013, 01:35 PM   #23
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Quote:
Originally Posted by Danny_mx5 View Post
I've unplugged the the wideband and the car will finally idle normal. Did I buy the wrong replacement? I bought a 24302 ntk is the 24300 ntk the right one for the hydra 2.7? I also did splice the plug off my old flyin miata sensor and soldered it to my new sensor.
It's a point of debate. Hydra ships with a 24300 version, I would replace with that. 24302 is a lower amperage pump cell and some are claiming it works. I would also crimp rather than solder. Mp 150 male terminals iirc. CONN-56260 plus CONN-56057 seals.
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Old 12-03-2013, 10:41 PM   #24
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It's a point of debate. Hydra ships with a 24300 version, I would replace with that. 24302 is a lower amperage pump cell and some are claiming it works. I would also crimp rather than solder. Mp 150 male terminals iirc. CONN-56260 plus CONN-56057 seals.

I went ahead and ordered the 24300 I should be receiving this week hopefully it's the right one to be able to finally drive my car correctly. Do you have a link where I could order Mp 150 male terminals iirc. CONN-56260 plus CONN-56057 seals
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Old 12-11-2013, 07:03 PM   #26
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I've got the new ntk 24300 on the hydra 2.7 now. Still having issues I really wish I had a haltech :/ When I have the wideband plugged in the car revs up to 3k rpms and slowly comes down to 2k rpms and jumps from 1500-2000 rpms. The wideband isn't getting hot so the heater circuit isn't on. I checked the voltage coming out of the wideband wideband positive and it's at 9.5v hydra says it should be from 9-10v but when the fans on the car turn on the voltage on the positive drops down to a 8.6v. If I have the wideband plugged in and do a voltage check the voltage is at 2.6v.

At this point I really don't know what to do!!! I'm beyond frustrated with the hydra problems.
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Old 12-11-2013, 07:07 PM   #27
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If the heater circuit isn't working, check to make sure that the pins at the main harness are actually making good contact. I'm not terribly impressed with them. They may be too "compacted" to complete the circuit. If they're suspect, pull 'em back out, spread them a little, shove 'em back in.

Also double check to make sure that the wiring is correct. 2.7 SHOULD have only seen the "new style" wideband harnesses, but with the 2.5 and 2.6 there was some confusion at one point when the new wideband harness was updated. (Colors switched positions.)


I have the pinouts somewhere...
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Old 12-12-2013, 09:10 AM   #28
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I believe FM made a post somewhere about adding a ground at/near the ECU. If you're seeing a voltage drop with fans on, this might be something worth checking.
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Old 12-13-2013, 12:37 AM   #29
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I've decided I'm going to send the ecu out to flyin miata to have it tested and fixed if anything might be wrong with it. And I'm going to post it for sale anyone know how much I could get for the Hydra 2.7 with new wideband, Mazdaspeed harness, ecu mount? I'm going to switch over to a haltech sprint 1000
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Old 12-13-2013, 01:23 AM   #30
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$1200ish would be my guess.

The Haltech is nice, it's what i replaced my Hydra 2.5 with on my MSM.
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