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 Drive by wire Issues

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hammond22
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PostSubject: Drive by wire Issues   March 14th 2012, 8:02 pm

ok guys i need some help, my 2005 sti has no throttle response. it idles a little bit high the pedal is good iv swapped throttle bodies and the dbw relay is good. if you have any ideas please let me know
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nate jackson
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PostSubject: Re: Drive by wire Issues   March 14th 2012, 9:01 pm

I idle at 1100-1200 which is also high imo. Have you pulled any data log with fuel parameters? What is you fuel doing when giving throttle? How did this come about??? I don't know really anything about subaru, but all need air, fuel, and spark. Hope things work out for you bro.
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hammond22
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PostSubject: Re: Drive by wire Issues   March 14th 2012, 9:08 pm

Well its drive by wire so all electronic throttle I brought up my tuning screen an I get like 6 percent tps an it happened when I was on it hard probably fried the ecu
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PostSubject: Re: Drive by wire Issues   March 14th 2012, 10:24 pm

it is extremely hard to just fry an ecm. if you have logged it and its showing 6% tps then the computer is communicating. i would check your throttle peddle
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PostSubject: Re: Drive by wire Issues   March 15th 2012, 7:22 am

I put my pedal into another kids car that night worked in his car the ecu is the last thing in the system .... I think its in limp mode IV tried resetting it...nothing
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PostSubject: Re: Drive by wire Issues   March 15th 2012, 11:57 am

Is it setting a P0506 by any chance?

Make sure throttle body assy is clean of carbon build up. Perform adaptive idle relearn precedure-seams as though you can do a poor mans version by disconnecting the battery for 15min.

I would suspect that if anything is faulty it would be the stepper motor in your throttle body assy. Servicable as a whole throttle body assy for your spending pleasure.
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PostSubject: Re: Drive by wire Issues   March 15th 2012, 2:44 pm

I have swapped that I think my map is corrupt I'm going to re upload the original map an c what that does I'll let u know an with the hydra ecu I can't run a diagnosis to check codes
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PostSubject: Re: Drive by wire Issues   March 15th 2012, 4:05 pm

That didn't work either
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PostSubject: Re: Drive by wire Issues   March 15th 2012, 4:25 pm

Is the throttle plate actually moving?

I had a brief throttle issue with my g35 that was drive by wire. Resetting the ecu and doing the "learn mode" setup got it back working.
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hammond22
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PostSubject: Re: Drive by wire Issues   March 15th 2012, 4:33 pm

My laptop says 6 percent that's all
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PostSubject: Re: Drive by wire Issues   March 15th 2012, 5:07 pm

Does anyone have a sti ecu or know of anyone with one? i dont know if it will run or not but its worth a shot to see if the ecu is my problem before i go drop $1500 on one Evil or Very Mad

Im thinking the ecu is the problem because i just downloaded a map but yet my fuel table reads zeros. just like before
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PostSubject: Re: Drive by wire Issues   March 15th 2012, 5:25 pm

hammond22 wrote:
Does anyone have a sti ecu or know of anyone with one? i dont know if it will run or not but its worth a shot to see if the ecu is my problem before i go drop $1500 on one Evil or Very Mad

You can't just drop in a stock OBD2/CAN computer into a car and expect it to run without doing the Vin# recignition and security relearn with a sutable factory style scan tool.
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PostSubject: Re: Drive by wire Issues   March 15th 2012, 5:27 pm

b1r - TS wrote:
Is the throttle plate actually moving?

This is a very valid question.... can you have someone operate the throttle pedal with key on and physically look at the throttle plate to see if it moves and responds to the pedal?
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PostSubject: Re: Drive by wire Issues   March 15th 2012, 5:32 pm

No the throttle plate does not move
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PostSubject: Re: Drive by wire Issues   March 16th 2012, 9:41 am

You probably have a bad throttle body assy. You have to do a relearn on whatever one you put on for testing.
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PostSubject: Re: Drive by wire Issues   March 16th 2012, 9:48 am

Why would i have to do a relearn? this throttle body does the same as the other one. it is just a sensor with a motor . the hydra 2.5 is in limp mode or "safe mode" im talking to phil at element tuning about it now.. my map reads zeros on the ecu but when i pull it off and save it to look at it. it reads normal.
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PostSubject: Re: Drive by wire Issues   March 16th 2012, 3:30 pm

I know that on my Autronic you need to reset the TPS every now and again. What I do to reset it is you unplug the TPS, turn the car to the on positon, plug it back in, give the car full throttle for 10 seconds and release.

I know the Hydra is about the same as Autronic and I have this problem from time to time. Mine will show throttle open 2%. This process fixes the problem instantly.

Hope this helps.

If you ever need any help figuring out the Hydra let me know. I beleve the setup is about identical to Autronic and I have 6 years of problem after problem. Have her pretty much figured out.

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PostSubject: Re: Drive by wire Issues   March 16th 2012, 6:21 pm

I appreciate that mike an if I upload this an still have no throttle Phil said he could send me a tune for another sti stock to put NY hydra in to c if they loose throttle this would tell if the hydra is defective but it has to be a 05 or 06
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PostSubject: Re: Drive by wire Issues   March 16th 2012, 7:37 pm

So who has a 06 or 05 sti that would be willing to put my hydra in thier car for a few bucks
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