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Old 03-05-2009, 04:28 PM   #1
powerneedy
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Default Car cutting out when going wot???

So my dads car is now a 95 with pretty much everything 04 05 sti...

the problem is when you put the throttle 85% the car throws a tps high voltage code. its not the pedal out of wack as we had 2 and both do this. I am un sure how to test if the tps is in check and were it is, is it all contained in the dbw unit? is there a way to adjust this...

thanks guys
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Old 03-05-2009, 05:43 PM   #2
MasterKwan
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With an OBD2 scanner, you can watch the TPS voltage.
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Old 03-05-2009, 08:38 PM   #3
munkis
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you cant make any adjustments to the dbw throttle assembly. What code numbers are you getting?
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Old 03-07-2009, 07:45 PM   #4
wrxSLEEPER03
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Check all the wiring, it seems you have a nice swap. So check the wires and check voltage with a scanner. Most repair shops will have one but usually charge minimum an hour labor to do it so good luck.
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Old 03-09-2009, 05:24 PM   #5
powerneedy
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i can scan it with the a cobb ap...

I think its code high voltage tps d and e i will get the numbers and post it here shortly
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Old 03-09-2009, 09:45 PM   #6
Spiider
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Also check the vehicle speed sensor, if it is bad you get behavior just like this. It feel's a 4500 rpm cutoff like a stutter box in a bracket car.
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Old 03-10-2009, 10:08 AM   #7
kirkdunkan
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Where to see code numbers? Don't find.
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Old 03-13-2009, 12:35 PM   #8
powerneedy
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ok i have the code numbers, I pretty sure these are the only 2 it is throwing

p2123

p2128
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Old 03-13-2009, 01:38 PM   #9
MasterKwan
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You know there was a discussion about this same thing in the 2.5 forum. It's not happy with the DBW gas pedal (those 2 codes are DBW codes). You're probably getting it to read over 100% at the ECU and it's cutting the power.

The procedure implies you have a wiring problem with the DBW pedal though.
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Old 03-13-2009, 02:16 PM   #10
powerneedy
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ya i under stand that its a dbw issue and its going over 100%


How would i have a wiring issue when the only thing that has been cut on this whole harness is headlight taillight, and stuff for the doors???

could it be a ground? i just need to figure this out and i have completely ran out of ideas...

could it be the throttle body motor has gone bad? It makes a electrical whine when you have power going to it when the car is off... would that imply that its a ground? but i dont understand how if its a ground why it would be telling to that the pedal has more range

TIA
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Old 03-13-2009, 03:15 PM   #11
MasterKwan
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I'm just telling you what the trouble-shooting procedure says. I have no opinion of whether it's wiring or not. Going over 100% throws the car into limp mode according to the other topic. If it's going over 100% you need to do something to prevent it.

The whine you hear might be the DCCD. I was out dicking with the DCCD controller the other day and it makes a distinctive whine when it's in manual mode and I change the position,.
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Old 03-13-2009, 08:13 PM   #12
silentt
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Take a look at the ECS Pedal adapter, their adapter has a fix for that. Check it out on RS25, should be in the vendor section.
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Old 03-13-2009, 08:26 PM   #13
powerneedy
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no no i can here the whine coming from the throttle body
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Old 03-13-2009, 08:28 PM   #14
powerneedy
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i have the pedal adapter... what the fix, im trying to find it and cant?
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Old 03-13-2009, 09:24 PM   #15
MasterKwan
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My fix was to install the plastic bumper on the floor of the car that prevents the pedal from going too far.
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Old 03-14-2009, 05:08 PM   #16
powerneedy
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so this is not an uncommon thing then ?

if its just a matter of i have to stop the pedal thats fine i thought it was to do with somthing else
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