i can get my car to start w/ the stock ecu, but not w/ the hydra. the hydra will start my friends car but not mine so i know it's good. what could be the problem? the only other wireing in the car that might cause a problem could be the turbo timer and defi link as they are wirred into the iginition. i am at a lost what do you guys think?

Assuming you got your hydra from Element tuning, all the settings are correct. However... if you have different injectors than the map that was sent out, then you may have to make some adjustments.

I would add 1ms of fuel on the first 3 rows, all colums below 1 lb boost (all vacuum load sites). Try again.

did you read the ? it will work on one car but NOT mine so its the hydra. im trying to figgure out if the TT or the link would effect the ignition. phil said that the hydra doesnt use all of the wires in the harness so some neseccary for the hydra to start the engine may not be that important for the stock ecu to run

recap hydra doesnt work on my car, does on my friends. stock ecu will start my car. ?????

maybe the charge on the batt. Since it takes more cranks to start.
When i first got hydra, didn't know about the extra cranks, so about the 4 or 5 tries the starter seems little weaker. It drans alot of amps to start it that for sure.
Good luck.

naw man i tried that too, im completely stumped.

Remove the defi link and turbo timer. They're the only variables left. I don't know what they're specifically wired into, but if either alter a signal that the hydra is looking for, it could be enough to prevent the hydra from generating the correct output (fuel/timing) to get your car to start. It is just a computer, so junk in = junk out.

I'm just making a guess based on the info provided... Given you have a swap (shortblock? longblock? if so, are you trying to run the AVCS with the hydra?) it may be more complicated...

Good luck.

klug

bump

Your freinds car is a "normal" wrx, right?
And your car is a wrx with a USDM STI motor swap, right?

That may be the problem, If you got your Hydra with a USDM WRX 2.0L base map, it will not run your USDM STI 2.5L motor.

nope it would at least start. ive run the sti 2.5 no a normal wrx ecu before and it ran fine.

plus it's mapped for my setup of course.

nope it would at least start. ive run the sti 2.5 no a normal wrx ecu before and it ran fine.


This has NOTHING at all to do with you issue.

The issue is NOT the HYDRA....it is your car.

This has NOTHING at all to do with you issue.

The issue is NOT the HYDRA....it is your car.


if YOU can read the thread i stated that the hydra works FINE. im trying to trouble shoot what wrong w/ my car. thanks for the help.

Assuming you got your hydra from Element tuning, all the settings are correct. However... if you have different injectors than the map that was sent out, then you may have to make some adjustments.

I would add 1ms of fuel on the first 3 rows, all colums below 1 lb boost (all vacuum load sites). Try again.

I second this. All engines are different and some need more fuel to start. If you have a starting problem and the hydra is setup properly you more than likely need more fuel. When you crank the engine watch the fuel table and you'll see the load site/RPM where your engine is trying to start. Add fuel in tose cells and the surronding sites.

again the map is specifically for my car. anyone have any useful comments?

again the map is specifically for my car. anyone have any useful comments?
The stock ecu starts your car but the Hydra doesn't. The Hydra starts your friends car but not yours. Which means that Hydra works and so does your engine and sensors. Call Phil and if doesn't tell you what Darth and I already said I'll be surprised. Just so you know, I also ran the EJ257 long block with the stock wrx ECU for months waiting on the Hydra. I got my hydra "again the map is specifically for my car" and it wouldn't start. Why? Not enogh fuel in the startup portion of the fuel map.

i called Phil the first time it happened, just thought i might get some help here over the weekend. map has plenty of fuel, was running 10:1 on my buddies car.

i called Phil the first time it happened, just thought i might get some help here over the weekend. map has plenty of fuel, was running 10:1 on my buddies car.


I think Darth and CK are referring to cranking enrichment, not what the car idles at....but anyway, my vote is for either what they recommended, or the wiring.

What rpm do you see on your laptop when the engine is cranking? Is it a relatively steady 150 - 250 rpm? If you see no rpm, then goto tools->input diagnostic and check if the trig and sync timer numbers are changing on cranking. If either is not changing, then you have a crank (trig) or cam (sync) sensor issue.

If the rpm is a reasonable value, then you must have a fuelling issue.

Start with the fundamentals: Are you getting fuel out of the injectors (pull one and crank), and during the cranking are you making a spark (meter)?

Check the MAP sensor (not really used by the stock ECU, but fundamental for the Hydra). Maybe someone can tell him the voltage.

Will the car start with at push start, but not idle? or only idle when warm?, etc? Try a push start (only after you have confirmed fuel and spark).

Well, to update this issue. I got his car started today with the Hydra. It started right up...and idled like crap. Since he really needed to pick up his car, I pulled the UTEC out of my car which is tuned for the same injectors as Pux is running. I figured he should at least be able to drive it. The stock ECU with UTEC started up a bit worse than the Hydra...then promptly idled like crap for a couple of minutes and died. We swapped back and forth between the two ECUs a few times, all the while checking for vacuum leaks in the system, still both idled horribly.

Tomorrow I am going to search the map pretty thoroughly and do a very in depth search for vacuum leaks and maybe even pull a sensor or two from the remnants of my car and swap those out. Unfortunately, hooking either computer up to my car is no longer a possibility as my engine has now been pulled out and is currently in a hundred or so pieces around the shop.

I have to admit that with all the phone calls to Phil and all the reading up on the system, I am getting one heck of a crash course in Hydra programming.


Kent

no kidding, trouble shooting 101 huh! lol

awsome, i'm glad i ordered my hydra now. hopefully everything turns out ok- IC

Vacuum leaks aren't going to have a major impact during idle using the Hydra as they would if it was a MAF based system so I wouldn't spend much time on that. Unless it's a huge hole ;)

If it's idling really rough (lumpy) check the coil packs.

Thanks,
Phil
www.elementtuning.com

it finally runs. idles like hell, but is so smooth when driving. its great, im so glad im rid of my utec. w/ a bit of work this thing is going to drive better than stock.

Brandon, clean out your PM's, I can't send you any :D

ok gotcha

Did you get everything figured out?

So what was the problem with the Hydra?

finally got it going. the plugs were destroyed by all the cranking and fuel. the tec that ran the boost tube didnt install it in the right place and had a pinch in the tube so the hydra could not read VAC, inturn i dumped fuel on the engine as if it was in boost. on the way home coil pack went out. i finally got it to a friends shop this week and we checked all the plugs and coil packs. swapped a coil pack and now it works well. just gotta get the idle down a bit and its good to go. next im gonna try to wire in my avcs and see how that works out.

I'm glad you got it fixed. The AVCS wiring is simple. I cut the connectors off of the JDM engine harness and wired them straight to the hydra. You only need the solenoid connectors since the Hydra. The base AVCS map for the hydra is horrible. Phil can give better settings or PM me and I'll give you the settings. The settings I got from Phil work well but there is still room for improvement. I'm sure you already know but you'll need to retune the spool up area as it will be very rich once you wire the avcs.

how much did the avcs help w/ your spool up?

puxx88,

No need to change the AVCS mapping as it's already been updated to the latest Element AVCS settings.

Thanks,
Phil
www.elementtuning.com

how much did the avcs help w/ your spool up?A few hundred rpm on the 18G w/TMIC. I have herd that it makes a bigger difference on bigger turbos.

puxx88,

No need to change the AVCS mapping as it's already been updated to the latest Element AVCS settings.

Thanks,
Phil
www.elementtuning.com
Thats is good to know.