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Old 07-19-2007, 11:39 PM   #1
mxpunk
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Default Got P0120 CEL after emanage install & other issues

I wired up the emanage the other night and after I got it in the car through a CEL for the TPS/Pedal Position sensor (P0120)

I disconnected the TPS wire from the emanage harness and it still throws it..so what im gonna try and do is totally re-wire the emanage again tomorrow or this weekend.

But in the mean time..anyone got any ideas on whats causing this? The car didnt have any CELs prior to the emanage install.

Now for the 2nd problem; the car won't start with the ignition harness wires installed but when I hook the wires back up so they're going straight to the ECU instead of through the emaange it works..but when it goes through the emanage the thing wont start.

I checked the wires on the harness with a volt meter and they work..and I double checked the wiring and it appears to be right. Is it possible my emanage is busted??

Thanks
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Old 07-20-2007, 02:08 AM   #2
PhilSine
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I'm guessing that you got your input and output wires mixed.

I did the same thing.

All you need to do is to swap the wire that you thought was supposed to provide an input to the emanage with the one you thought was the output.

The TPS inputs a signal to the OE ecu. You cut the TPS wire to route the signal through the emanage. The input to the emanage should be coming from the harness side and the output from the emanage should go into the ecu.

I hope my rephrasing of this is what you needed to hear in order to get it figured out.
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Old 07-20-2007, 05:38 PM   #3
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hmm thanks dude. i will def. check it out..i thought the TPS was only a splice and not a cut....

im dumb!
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Old 07-20-2007, 06:19 PM   #4
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well i totally took out the emanage and the car has zero CELS.. lol

time to wire it back in!
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Old 07-20-2007, 06:44 PM   #5
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you should have just bought a wire harness. its kinda pricey but worth it for the less hastle.
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Old 07-20-2007, 08:04 PM   #6
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they dont make it for my car..they make one for the jdm wrx's ..ej20g's.....if they made one for NA subarus, i woulda bought it

i rewired it..no CELs..now my laptop isnt communicating with the emanage! argh!!
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Old 07-21-2007, 01:30 AM   #7
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After reviewing my notes, the TPS is an input only and like you said, a tap and not an interrupt. Its possible that you simply had a bad connection somewhere.

Don't forget to run the MAP sensor through the emanage so it can trick the ecu into thinking its there. Use the analog voltage in and out for this and remember that the harness side will input to the emanage and/or the ecu. So analog voltage in on no.31 from the emanage is the MAP sensor in from the harness and the analog voltage out on no. 37 of the emanage harness heads out to the ecu.
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Old 07-21-2007, 01:42 AM   #8
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my car doesnt have MAP, its MAF based but im getting it anyway cause ive been told it makes tuning easier!

for now i will try and trace MAF voltage and tune from there.

oh and..i rewired it..bad connection like you said and no CELS. tomorrow im going to try and put the ignition harness in, hope it works!
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Old 07-21-2007, 02:44 AM   #9
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Quote:
Originally Posted by mxpunk View Post
my car doesnt have MAP, its MAF based but im getting it anyway cause ive been told it makes tuning easier!

for now i will try and trace MAF voltage and tune from there.

oh and..i rewired it..bad connection like you said and no CELS. tomorrow im going to try and put the ignition harness in, hope it works!
Funny thing about that...I didn't think mine had a MAP sensor either and it did. You're probably right since you're working with a '96 about it not having a MAP sensor.

I have found it a lot easier to tune with the TPS voltage rather than the MAF voltage. You might have better luck than I did but if you do go to the TPS after trying with the MAF find some comfort in the fact that its an easy transition with respect to re-writing your maps from MAF based to TPS based.
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Old 07-21-2007, 02:12 PM   #10
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yeah i believe most phase II ej22's (ej22ez?) are MAP based. Not sure if the ej18 in the 97 impreza was maf or map but im guessing its maf and still phase I..

i will look into tuning via TPS, it does look alot easier..

just curious, how is your car idling? you said you're using 550 sti side feeds IIRC..

you using the injector scale back feature with your emanage?

the reason im asking is, im using USDM Turbo Legacy Pink injectors (370cc) and the car does idle without the emanage. however after driving it with just injector correction i noticed its alot smoother off idle and it doesnt stumble.

are you adjusting timing via TPS too?
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Old 07-21-2007, 11:10 PM   #11
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Quote:
Originally Posted by mxpunk View Post
yeah i believe most phase II ej22's (ej22ez?) are MAP based. Not sure if the ej18 in the 97 impreza was maf or map but im guessing its maf and still phase I..

i will look into tuning via TPS, it does look alot easier..

just curious, how is your car idling? you said you're using 550 sti side feeds IIRC..

you using the injector scale back feature with your emanage?

the reason im asking is, im using USDM Turbo Legacy Pink injectors (370cc) and the car does idle without the emanage. however after driving it with just injector correction i noticed its alot smoother off idle and it doesnt stumble.

are you adjusting timing via TPS too?
I haven't played with timing yet but think I might soon because of what's going on at higher RPM's under load (4th & 5th gears).

My car idles like crap but that's because a recent problem has emerged with my idle air control valve. It was idling pretty good before that problem surfaced using several adjustment maps.

I have had to use my emanage to both add fuel where it starves and cut fuel where it loads up. There is one point in my map where I have a value of -5.0% set to stop the injectors from flooding the engine at 5500 RPM's
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Old 07-21-2007, 11:24 PM   #12
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so you're pulling MAF @ that high rpm? i cant make mine do negative numbers on the injector map, only the MAF.


i was told not to mess with any MAF stuff since i have full control over timing and injectors via the harnesses
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Old 07-22-2007, 11:17 AM   #13
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I've eliminated the MAF from every fuel equation. I tune strictly on the TPS now.
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Old 07-22-2007, 11:27 AM   #14
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So when are we gonna see some pics of your OBS-T? Hows it running??

Post your build on RS25 like I did, things are alittle more relaxed then over here. And everyones cool.
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Old 07-23-2007, 02:53 AM   #15
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Its running decent although I'm still tweaking a little here and there on my maps to get all RPM and load ranges working smooth.

I replaced the right front wheel bearing today and had it up to 125 mph on the post-op test run. I know that car has more in it but the fuel maps turn funky on me at 5k rpm's and up in 5th gear.

I think I'm done with my fuel maps and just need to play with timing a little because when the boost hits is when things will act up a little

It wants to go way rich at certain points. I tweaked the ignition map to advance timing a bit at 5k and up at 70***37;-100% throttle by .5* and I'll upload and test tomorrow.

From 0-4k rpm's in any gear things are great. At partial throttle (10% - 70%) from 4k rpm's on it likes to load up on fuel. I have a timing advance of .5* at 4k + RPM's at 10% - 70% throttle now and I'm gonna see how that does.

I'm not sure how much differecne .5* will make but its a starting point.
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Old 07-23-2007, 01:36 PM   #16
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Hey i wanna see the OBS-T. post some pics
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Old 07-23-2007, 11:43 PM   #17
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Quote:
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Hey i wanna see the OBS-T. post some pics
Fine...

I'll get off my but and try to get some out by Thursday or so.
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Old 07-24-2007, 11:00 PM   #18
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errrhhhhhh for some reason my ignition harness wont work with my car

i checked the wires..they're in right..........guess my emanage is borked? the car runs fine without it..i have use of MAF control and the injectors but..car is no show with the ignition.

sucks.
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Old 07-25-2007, 11:25 AM   #19
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and...on top of this, the light on my emanage is blinking red constantly. help!!
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Old 07-26-2007, 01:44 AM   #20
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still running bad? blinking red light eh.. isnt that means ur not getting power or something.. dude double and triple check the wiring.. i had to check mine like 10 times..well maybe 4.. but at the 3rd time i still corrected something.... u know those color will get u crazy..

englsihtown eh.. maybe i should swing by one day and check it out!
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Old 07-26-2007, 11:02 AM   #21
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it works! but still flashing red lights once in awhile..
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Old 07-26-2007, 02:55 PM   #22
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Cool.

What features of the Ultimate are you using (ie. Autotune w\ wideband, MAF elimination with MAP VE tables)?

I plan to eliminate my MAF using the MAP sensor from my Profec E-01 but am wondering how hard its going to be to set up the VE tables.

I'm also wondering if the Autotune feature does closed loop adjustment as well as timing.

And no I haven't taken time to read through the 300 page instruction manual from Greddy that is only half legible
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Old 07-26-2007, 09:38 PM   #23
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im using emanage blue. no cool features here..

i plan on getting the ultimate for my 22b poser build though (rs heads & ej22e block) lol.
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Old 07-26-2007, 11:34 PM   #24
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Quote:
Originally Posted by MY99 2.5GT View Post
Cool.

What features of the Ultimate are you using (ie. Autotune w\ wideband, MAF elimination with MAP VE tables)?

I plan to eliminate my MAF using the MAP sensor from my Profec E-01 but am wondering how hard its going to be to set up the VE tables.

I'm also wondering if the Autotune feature does closed loop adjustment as well as timing.

And no I haven't taken time to read through the 300 page instruction manual from Greddy that is only half legible
i tried the auto tune using the wideband .. it sux ballz!!! i think my tuning skill is better than that.. it only add and cut fuel... to match the AFR that u wanted to at that PSI vs RPM curve...doesnt mess with ur timing.. and it does get learned over by the super duper smart ecu.. under 4k rpm.. beside a reflash to take out that completely there is no other wasy to bypass that learnover.. i dunno the MAF thingy since my car is doesnt have a MAF..

if u have a MAF based car.. that means u have a pre 00 ecu .. those are the dumb ecu and u can actually do something with it
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Old 07-27-2007, 12:37 AM   #25
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Quote:
Originally Posted by darkmist2k1 View Post
i tried the auto tune using the wideband .. it sux ballz!!! i think my tuning skill is better than that.. it only add and cut fuel... to match the AFR that u wanted to at that PSI vs RPM curve...doesnt mess with ur timing.. and it does get learned over by the super duper smart ecu.. under 4k rpm.. beside a reflash to take out that completely there is no other wasy to bypass that learnover.. i dunno the MAF thingy since my car is doesnt have a MAF..

if u have a MAF based car.. that means u have a pre 00 ecu .. those are the dumb ecu and u can actually do something with it
There is no way to do closed-loop auto-tune. You will have two o2 sensors fighting eachother. A/F ratio is meaningless in Closed-loop. You need to look and fuel trims and match your tune to the factory ecus fuel trims. IE fuel trims very close to zero.

If you are having issues keeping the A/F ratio you are tuning for then a reflash will not help you either. Try reflashing an ecu to run richer during during cruise. Eventually you will be running lean in open-loop. Reflashing and Piggybacks do the same thing in differnet ways. You still have to work with the factory ecu to get what you want.
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