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02-02-2013, 01:38 AM | #541 | |
Mr. 155 and climbing
Drives: Seriously Modded 07 Sedan Join Date: Jun 2006
Location: In The Hotbox
Posts: 4,742
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Quote:
most likely not unfortunately...
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Team Tiamat Racing on Facebook Youtube Channel: Team Tiamat Racing Class record holder in Land Speed @ 154.5mph for 1.5 mile and 145.5mph in the mile in the F (2.016 to 3.014 L), G (1.524 to 2.015 L), and H (1.016 to 1.523 L) classes. |
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02-02-2013, 08:43 AM | #542 | |
ULTIMATE
Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
Location: USA, CT
Posts: 13,460
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Quote:
BlownXA mentioned the ring land issue in another thread. That does unfortunately seem like a possible cause. I wonder if pulling the fuel injector and coil connectors, individually off each cylinder, would allow you to see if one cylinder is acting differently than the others.
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02-02-2013, 10:11 AM | #543 |
Takes corners too fast!
Drives: Absolute Red 2009 Yaris HB Join Date: Apr 2012
Location: Columbia, SC
Posts: 830
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^ yep, pull one of the ways for a cylinder to run and if your rps only drops slightly then that is the problematic cylinder. if they drop a few hundred then it is most likely not that cylinder. you will be looking for minimal change in operation.
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02-03-2013, 09:09 AM | #544 |
C'est la vie
Drives: 2009 2 door hatchback Join Date: Aug 2009
Location: chicago
Posts: 482
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My friends supra had multiple cyl. missfires. Turned out to be bad coils. He replaced them all. May be worth a shot. Also if you buy a set of Noid lights you can check the signal coming from the injectors. Its just a light bulb that attaches to the injector connector. With the starter cranking you can watch them blink.
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02-06-2013, 06:30 PM | #545 |
Drives: 08 Yaris Turbo; 06 tC Turbo Join Date: Jan 2010
Location: New Jersey
Posts: 875
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Guys... It's finally over.
It turns out it was the blow off valve! I had just gotten a set of new coils, threw them in, and no dice. For whatever reason, the engine was running (slightly) better, and I noticed it was holding a fairly constant -12 vacuum. I don't know what possessed me to do so, but I started kinking portions of the vacuum lines. As soon as I kinked the line going to the reference port on the BOV, the engine immediately responded! In retrospect, it's obvious why this didn't turn up in any of the four leak tests done. They all used positive pressure (smoke, air compressor), and the BOV was leaking only under vacuum (which makes sense considering how it operates). I can't even begin to explain how relieved I feel lol... And I'll finally be able to enjoy my new wheels I got literally the day after the problems started lol. The company I bought this (likely knock off) BOV from will definitely be hearing from me. |
02-06-2013, 07:38 PM | #546 |
1NZ-6spd
Drives: '05 6-Spd Vitz RS Join Date: Oct 2008
Location: Oshawa, Ontario, Canada
Posts: 2,967
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Can you return the coils?
Glad you finally figured it out! |
02-06-2013, 08:12 PM | #547 |
Mr. 155 and climbing
Drives: Seriously Modded 07 Sedan Join Date: Jun 2006
Location: In The Hotbox
Posts: 4,742
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Tial BOV is the way to go for sure. If/when my HKS dies or if I get a wild hair I am gonna change to a Tial.
Awsum to hear that you finally figured it out!
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Team Tiamat Racing on Facebook Youtube Channel: Team Tiamat Racing Class record holder in Land Speed @ 154.5mph for 1.5 mile and 145.5mph in the mile in the F (2.016 to 3.014 L), G (1.524 to 2.015 L), and H (1.016 to 1.523 L) classes. |
02-06-2013, 10:54 PM | #548 |
Drives: no-longer-boosted '10 Yaris Join Date: Nov 2009
Location: Angus, Ontario
Posts: 1,891
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WTF NO F'N WAY! I SWEAR IF THIS WAS MY ISSUE IMMA B PISSED.......
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If it has boobs or wheels sooner or later your gonna have problems with it |
02-07-2013, 12:30 PM | #549 |
Drives: 08 Yaris Turbo; 06 tC Turbo Join Date: Jan 2010
Location: New Jersey
Posts: 875
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^ Lol. Your compression says otherwise though.
I've taken it apart and can't really figure out what's going on. My guess, since it was leaking past the valve, is that it wasn't sealing properly under normal operation. Kinking the reference line must have made it operate in reverse and force the valve closed. Maybe the spring is worn? I'm going to try shimming it before completely replacing it since I can use the Zage bov in the meanwhile. Still can't believe the hell I've been through for something so simple. I'm especially bitter about bovs now because I also had trouble with the one in my tc lol |
02-07-2013, 01:23 PM | #550 |
Mr. 155 and climbing
Drives: Seriously Modded 07 Sedan Join Date: Jun 2006
Location: In The Hotbox
Posts: 4,742
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Dude, now you have an idea of what I went through....after I had installed my "new" engine along with the new setup for boost control I was sooooo leery and scared especially after the first few drives the boost wasn't stopping on building. That made me really frustrated and then of coursing finding out my new wastgate was missing a line plug which then buttoned it up nice and solid.
__________________
Team Tiamat Racing on Facebook Youtube Channel: Team Tiamat Racing Class record holder in Land Speed @ 154.5mph for 1.5 mile and 145.5mph in the mile in the F (2.016 to 3.014 L), G (1.524 to 2.015 L), and H (1.016 to 1.523 L) classes. |
02-07-2013, 10:08 PM | #551 |
C'est la vie
Drives: 2009 2 door hatchback Join Date: Aug 2009
Location: chicago
Posts: 482
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Glad your back on the road. And that sucks. I have had mine cause some problems but not that bad. Now I recirculate the air back to the intake. It works much better if your using the stock mass air sensor.
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02-08-2013, 05:55 PM | #552 | |
Drives: Scion xA Join Date: Oct 2009
Location: Virginia
Posts: 449
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Quote:
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