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Old 07-13-2014, 03:04 AM   #1
Joshwrx04
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'05 CGM STi cornfed
'82 s-10 (427'nd soon)

Default Bad tank of e85?

So ive had a strange couple days with my car.

05sti

Mps long rod built sb 4k miles on it
ID 1300's with id conversion sidefeed>topfeed rails.
Dw 300 pump hardwired
Kevlar fuel lines 6an from firewall out
Dom 1.5 xtr
Tbxs frontmount
Aeromotive fpr
Aem 3.5 map sensor
Hybrid speed density tuned by cobb surgline
E85
Ect

So heres what happened.....

Other night leaving work, 4th gear pull, started bucking and stuttering hard.
Idle's find and drives fine out of boost.

Had some previous trouble with my #1 coilpack.
Changed it with a new one.
Nothing changed... This time threw misfire codes in # 2 ,3 and 4. Strange...

Today pulled both #1 and 3 coils, and plugs.
Plugs looked ok, re gapped them to .28 as they were at .30 after only 4k on my new motor.

And this time swapped the new coil into the #3 cylinder and put the original #1coil back into the #1 cyl.

Drove to the gas station with out getting on it...and drained my e85 and filled up with 92 pump, switched maps and started up, started strong. Drove around for a few miles then made a pull, pulled strong on the pump gas.

Anyway, so im kinda stumped on what was causing these issues...
So im wondering if i had some bad e85 or what.

Anyone have any input?

Thank
J
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Old 07-23-2014, 02:54 AM   #2
04sti_roma
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You get this fixed?
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Old 07-23-2014, 03:02 AM   #3
Joshwrx04
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'82 s-10 (427'nd soon)

Default

Quote:
Originally Posted by 04sti_roma View Post
You get this fixed?

No, was running alright on pump for a few days, no im having issues with it leaning out (17.1) when accel. It will spike down to 17.1 then go back.
And under full boost it hitting the target afr of 11.1 then creeping back to 14.7 at towards redline

its some kind of fuel delivery issue.
Very frustrating. My whole fuel system is less then 2k miles old.
Dw 301 pump hardwired
-6an from the firewall forward
Id 1300's
Id rails
Kevlar lines and a aeromotive fpr


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Old 07-23-2014, 08:22 AM   #4
KillerBMotorsport
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Definitely sounds fuel delivery. You have a decent E-85 filter.

BTW here's a good read on E-85 from INJECTOR DYNAMICS...
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Old 07-23-2014, 09:36 PM   #5
Joshwrx04
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'82 s-10 (427'nd soon)

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Nice read! Thanks killer b

And no i have the oem filter, cobb said oem would be fine for my setup when they tuned my car




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Old 08-01-2014, 08:40 PM   #6
04sti_roma
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Yea mines acting up again too. I was having same issues I checked my fuel stuff it all checked out good. Then started playing with intercooler pipping and it fixed it. Now the problem is sorta back. Check all your boost and vacuum lines. Double check the vacuum hose on fuel pressure regulator. Mine was pinched and had a little rip in it. But problem came back. Mines sputtering everytime I switch gears and at idle when I give it has it has a tiny sputter. I'm gonna start doing a boost leak test get some PVC caps and all that.
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Old 08-01-2014, 08:42 PM   #7
04sti_roma
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Also a thought, maybe crack in the headers or up pipe.
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Old 08-02-2014, 12:39 AM   #8
Joshwrx04
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'82 s-10 (427'nd soon)

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Ya I've went over everything a few times.
I did find a tear in my vacuum line from my fpr. Fixed that and its running better but still have the lean "stumble"


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Old 08-02-2014, 06:05 PM   #9
04sti_roma
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Yea me too and it's driving me crazy lol I'm gonna take my injectors out and clean them myself.
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Old 08-02-2014, 08:38 PM   #10
Paul
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Same issue here. Mine hits 11.1 then leans out to 12.5 after 7k. Going pull fuel pump to see of a issue is there.
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Old 08-02-2014, 08:57 PM   #11
Joshwrx04
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Ya im about to pull mine also.
Do you have headwork?
You said its leaning out at 7k


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Old 08-02-2014, 09:32 PM   #12
Paul
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Twin Scroll 2.5XTR EJ207

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Stock v8 Ej207 revs to 8k
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Old 08-03-2014, 12:42 AM   #13
Joshwrx04
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'82 s-10 (427'nd soon)

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Ok gotcha


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Old 08-04-2014, 02:57 AM   #14
04sti_roma
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I fixed my problem today. It's your injectors man. I ran them with 91 I live in Cali lol but yea I ran 91 and it seemed to help clean them but it was getting worse. I pulled out my injectors and just put some WD40 in them let them sit for like 5min. Then got a little 9 volt battery and at the same time I fed wd40 and it squirted them out. Easier to use two ppl but it's possible alone. So get a battery speaker wire. Butt connectors so they clip on the injector and run them with wd40 it has to work.
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Old 08-04-2014, 02:59 AM   #15
04sti_roma
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Don't hold the injector on too long. I'd counted about 4 seconds. Or just tap power not crazy fast but keep tapping power to them like 3 4 times.
And I have ID2000cc on e85 also.
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Old 08-04-2014, 03:01 AM   #16
Joshwrx04
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'05 CGM STi cornfed
'82 s-10 (427'nd soon)

Default Bad tank of e85?

Hows your car running now?
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Old 08-04-2014, 02:13 PM   #17
04sti_roma
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It runs like I just took it off the dyno. 600hp feels so good again haha clean the injectors I bet that's what your problem is too!
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Old 08-04-2014, 07:37 PM   #18
Joshwrx04
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Ill have to try it. So pull them out and run wd40 through them?
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Old 08-04-2014, 09:34 PM   #19
04sti_roma
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Yea. What I did was spray wd40 in them take them apart and wipe down. And spray a little more and put them back tougher. Then i let them sit till I made my connecter tool and found a battery. I had a friend spray wd40 with the draw going in the top of the injector. And at the same time he was spraying I was giving power to the injector. Did it about 3xs to each injector for about 3 seconds each time. Then wipe them down and put them back in the car. Started it up let it run for about 5 min no revving. Just started the car and waited. Gave r gas and the rpm went up smooth no more roughness like before.
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Old 08-05-2014, 11:36 PM   #20
04sti_roma
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Did you try it?!
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Old 08-05-2014, 11:44 PM   #21
Joshwrx04
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I haven't, I'm picking up new coil packs tomorrow and i have new plugs too throw in.
If i don't get anywhere with that then i will pull the injectors and bring them over to witchhunter (since they're local, and have them clean/flow test them. Im alil ehh about cleaning them myself lol
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Old 08-06-2014, 12:14 AM   #22
04sti_roma
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It's up to you. I just wanted something to fix it asap. Plus you'll have them flow tested too?
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Old 08-06-2014, 12:19 AM   #23
Joshwrx04
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'82 s-10 (427'nd soon)

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I might try it depending on how impatient i get.
Well i will have them clean them, i think they flow test them once they clean them..
Maybe not idk.

Your car still running good?
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Old 08-06-2014, 11:53 AM   #24
yamahaSHO
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Quote:
Originally Posted by 04sti_roma View Post
Don't hold the injector on too long. I'd counted about 4 seconds. Or just tap power not crazy fast but keep tapping power to them like 3 4 times.
And I have ID2000cc on e85 also.
You have ID2000's which are more likely to have issues on E85. The OP has ID1300's which were specifically designed around the use of E85.
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Old 08-11-2014, 11:39 PM   #25
04sti_roma
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Did you fix it yet?
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