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Old 07-10-2013, 03:35 PM   #51
Layvon
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Ditch the FIC for ID2K. Ask me how I can be confident. I wish I would have seen this a few weeks ago..

The problem is, you didn't drive your car for a while, "a little corrosion built up", and now they are off. My FIC were off by a lot at idle. Car idled better on 3 cylinder than 4. The 4th injector wasnt really spraying fuel more like dribbling like a frat boy with syphilis . Sold my FIC for ID2K... instant fix and I got my car running stable at idle myself in 5-10 min after coldstart.
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Old 07-10-2013, 06:45 PM   #52
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Quote:
Originally Posted by manitou View Post
Sounds like tuning but not load based. You should have him just run SD with no MAF. It may take him a bit more to get that right with the VE map and all but Jr. tune my car that way and it runs very nice from idle on up!

Did you do the re-wire of the Walbro with 10 or 12 gauge wire, bigger relay etc...?
I'm currently on SD with no MAF on my current map. We tried to do a hybrid set-up during my last tune and it did not work out to well due to the fuel issues the pump is hardwired and I'm not sure if larger gauge was used etc. I'll have to ask that question.
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Old 07-10-2013, 06:46 PM   #53
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Frat boy with syphilis.
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Old 07-10-2013, 06:49 PM   #54
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Quote:
Originally Posted by Layvon View Post
Ditch the FIC for ID2K. Ask me how I can be confident. I wish I would have seen this a few weeks ago..

The problem is, you didn't drive your car for a while, "a little corrosion built up", and now they are off. My FIC were off by a lot at idle. Car idled better on 3 cylinder than 4. The 4th injector wasnt really spraying fuel more like dribbling like a frat boy with syphilis . Sold my FIC for ID2K... instant fix and I got my car running stable at idle myself in 5-10 min after coldstart.
I've never had a issue with FIC injectors these are brand new and have not sat at all. Purchased with my build so no corrosion built up or anything that you speak of. Also I've already swapped injectors around a few times to see if I have any issue follow the injector but that's not the case. I'm ruling out my injectors of any issues unless there is some hard facts of why they would be bad nothing has ever hinted towards them.

As for my idle problems they where simply because I had the wrong map selected. I'm back on a pure SD map right now until I get my inline pump and surge tank installed. The MAF sensor is still installed in the car but it's not being used.
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Old 07-10-2013, 06:51 PM   #55
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Quote:
Originally Posted by CatfaceType-R View Post
Frat boy with syphilis.
+1
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Old 07-10-2013, 10:13 PM   #56
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Quote:
Originally Posted by CatfaceType-R View Post
Frat boy with syphilis.
LOL nice Carmi!
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Old 07-10-2013, 10:19 PM   #57
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Not fuel supply/return, not injectors, not plugs, not coil packs. Check injector wiring, plug wiring, scope head to look for crack around the plug, swap ecus.
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Old 07-11-2013, 12:34 AM   #58
manitou
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Quote:
Originally Posted by jtrakel View Post
I've never had a issue with FIC injectors these are brand new and have not sat at all. Purchased with my build so no corrosion built up or anything that you speak of. Also I've already swapped injectors around a few times to see if I have any issue follow the injector but that's not the case. I'm ruling out my injectors of any issues unless there is some hard facts of why they would be bad nothing has ever hinted towards them.

As for my idle problems they where simply because I had the wrong map selected. I'm back on a pure SD map right now until I get my inline pump and surge tank installed. The MAF sensor is still installed in the car but it's not being used.
I still think your problems are tune based but I also agree with Levon, ditch the FIC's and get some ID's. You'll be grateful you did. You may also want to look into a different tuner....? You're not that far from Maxwell Power, go get a Dom Tune!
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Old 07-11-2013, 12:56 AM   #59
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Did the tuner modify the small IPW table?

The stock tables for the 04-06 STi's w/ sidefeeds are very different than the topfeed 07+ tables....so if you're running topfeeds (especially large ones) on an 04 STi, that table needs to be updated. The whole IPW range that table is active and the compensations need to be changed. You sweep through the table very quickly coming on and off throttle, so the corrections really cant be applied in teh VE table.

If you want to see if its the injectors and/or that table all in one shot, swap in a set of stock 07+ injectors and copy/paste that table in.

Or you can take the car out and try to cruise down a hill at a steady throttle just holding speed, if your AFR starts bouncing up n down it is a sign that the table needs to be updated.

If that doesnt work, check the plug in that cylinder for signs of being richer/leaner than teh others and utilize the per cylinder fueling and/or timing to make adjustments.

Last edited by Phatron; 07-11-2013 at 01:14 AM.
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Old 07-11-2013, 01:52 AM   #60
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If your AFR starts bouncing up while holding speed with steady throttle, it's just a sign that your ECU is working normally. Log AF Correction #3 and you'll see what I mean. Oscillating AFR just helps the cat reduce emissions more effectively.
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Old 07-11-2013, 02:13 AM   #61
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not after u dial in the ipw table....and disable the rear 02 corrections

give +-7% fueling corrections to a narrowband on a catless car....no thanks

even with teh rear02 disabled the afr will still bounce....

Last edited by Phatron; 07-11-2013 at 02:28 AM.
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Old 07-11-2013, 02:41 AM   #62
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Heres the tables against one another.....the corrections are in completely different spots....and these will change depending on what injector you're running....and how low your pw is getting and how linear the pw is. It is not just completely normal functionality of the ecu. the ecu is simply doing what its told. take one table and paste it into the other and see how normal your car functions...
Then take the per cylinder fueling comps from a tf car and put em in a sf car.....then take the per cyl timing comps......
The roms are vastly different. If you try to tune the same mods on a 16bit car vs a sf car vs a tf car, the cars will drive very differntly with the stock tables in there. the 16bit cars have simple 2d per cyl fueling/timing tables, the newer 32 bits are 3d, and the tf vs sf cars are adding/subtracting fuel at very diff rpm and pw.
When you combine all these differences you can get fueling results that are 20-40% off.




Last edited by Phatron; 07-11-2013 at 03:28 AM.
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Old 07-11-2013, 04:47 AM   #63
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I will pass all this info to my tuner thanks for some good knowledge/info! Updates to follow
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Old 08-04-2013, 05:18 PM   #64
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Nice car, love the teal. Sorry about your buddy.
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Old 08-05-2013, 11:39 PM   #65
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Would ID's new 1300's be enough injector to support this if you went to top feeds? They are supposed to be designed for E85 fuel. Awesome build man, will be following to see you get the bugs worked out.
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Old 10-14-2013, 07:49 PM   #66
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No real update I was sent off for another couple months and just got back. Still having the same misfire issue on cyl #1. Anyone have a recommendation of where to possibly add a ground to my harness? I have the normal two main grounds on the harness (one on the block and one above the starter). I'm looking to possibly add some more grounds around the coil pack area any suggestions on where to ground "point A to B"?

Also I'm on 92 oct and no change on the misfires. I'm looking to get a pump gas tune soon and possibly switching tuners (new eyes may bring a solution) but I want to complete as much trouble shooting as I can before throwing in the towel and paying for someone to trouble shoot. I know for a fact my tune needs a lot of work as we speak but anything mechanically I can complete I want to ASAP! Thanks for listening and I look forward to a response
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Old 10-14-2013, 07:56 PM   #67
john 1badSTI
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check out the misfire thread in the engine build forum,larger cams on the stock ecu can throw misfire codes due to the cam overlap.
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Old 10-14-2013, 08:36 PM   #68
jtrakel
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Quote:
Originally Posted by john 1badSTI View Post
check out the misfire thread in the engine build forum,larger cams on the stock ecu can throw misfire codes due to the cam overlap.
I'll have to look into this. First time I've herd your statement before I found a small thread on the built motor area but not a whole lot of information at this time. I commented in that thread just waiting for more info thanks for the response though!
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Old 10-14-2013, 09:14 PM   #69
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check this link out. worked for me and an easy fix
http://www.dirtyimpreza.com/forums/s...ad.php?t=15711
GL

Quote:
Originally Posted by jtrakel View Post
No real update I was sent off for another couple months and just got back. Still having the same misfire issue on cyl #1. Anyone have a recommendation of where to possibly add a ground to my harness? I have the normal two main grounds on the harness (one on the block and one above the starter). I'm looking to possibly add some more grounds around the coil pack area any suggestions on where to ground "point A to B"?

Also I'm on 92 oct and no change on the misfires. I'm looking to get a pump gas tune soon and possibly switching tuners (new eyes may bring a solution) but I want to complete as much trouble shooting as I can before throwing in the towel and paying for someone to trouble shoot. I know for a fact my tune needs a lot of work as we speak but anything mechanically I can complete I want to ASAP! Thanks for listening and I look forward to a response
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Old 10-15-2013, 09:05 PM   #70
jtrakel
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Quote:
Originally Posted by bmxhotsauce View Post
check this link out. worked for me and an easy fix
http://www.dirtyimpreza.com/forums/s...ad.php?t=15711
GL
I think I'll try this over the weekend!
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Old 10-16-2013, 09:41 PM   #71
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GL. Keep us posted
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Old 05-28-2014, 06:32 PM   #72
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Any updates on this.
Fighting the same issue on cyl 3 after new cams.
It's not the injectors, plugs, coils, grounding etc.
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Old 05-30-2014, 01:50 AM   #73
2013stiguy
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Bringing this back up, any updates? I also have the same issue on cylinder 3.
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Old 05-30-2014, 08:46 AM   #74
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Mine was either the injector or coil plugs, cleaned every connector on Wednesday with no effect.

Unplugged everything yesterday, checked leak down etc all good, reassembled and runs like a champ.
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Old 05-30-2014, 09:10 AM   #75
spoolinsti05
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Being the coils only clip in in one side sometimes they can be pulled out some on the back side and cause a misfire.
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