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Old 09-14-2012, 08:16 PM   #1
neb_subi
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Default TGV delete aftermath??

I deleted my tgv's today, bought them off of another member and installed them. Now it runs kinda choppy like a misfire but the codes haven't popped up for it yet.
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Old 09-14-2012, 08:20 PM   #2
quazimoto
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Ok............cool story....
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Old 09-14-2012, 09:12 PM   #3
the suicidal eggroll
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Probably have a vacuum leak
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Old 09-14-2012, 09:31 PM   #4
StealthTL
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New gaskets all round, or just re-used the old?
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Old 09-14-2012, 09:31 PM   #5
bluepearlrex12
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Need a tune
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Old 09-14-2012, 09:35 PM   #6
scby rex
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probaly all the above, go to revolutions and have Adam hook you up.
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Old 09-14-2012, 09:48 PM   #7
neb_subi
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Ya I've used new gaskets. I'm thinking its needing a tune?
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Old 09-14-2012, 09:49 PM   #8
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But Idk it shouldn't be running rough should it?
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Old 09-14-2012, 10:23 PM   #9
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You have a vacuum leak. You missed one of the 900 vacuum fitting connections...it happens. Check every fitting. Same thing happened to me as I missed the one that goes under the throttle body.
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Old 09-14-2012, 11:07 PM   #10
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Tune. period.
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Old 09-15-2012, 03:34 AM   #11
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Vacuum leak. Get a tune as well.
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Old 09-15-2012, 09:44 AM   #12
neb_subi
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Yes plan to get e85 tune as soon as I get injectors.
But the vacuum leak could be a possability as I did have to pull up on the maifold as i put the tgv in
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Old 09-15-2012, 10:48 AM   #13
the suicidal eggroll
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Quote:
Originally Posted by bluepearlrex12 View Post
Need a tune
Quote:
Originally Posted by mikeydrives1 View Post
Tune. period.
You don't need a tune for TGV deletes (other than to turn off the codes, and to make sure the extra flow hasn't push you into untuned regions of your map at WOT). Do people forget we run a MAF-based fueling system?
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Old 09-15-2012, 11:19 AM   #14
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Quote:
Originally Posted by the suicidal eggroll View Post
You don't need a tune for TGV deletes (other than to turn off the codes, and to make sure the extra flow hasn't push you into untuned regions of your map at WOT). Do people forget we run a MAF-based fueling system?
People read too far into the "everything you do needs a tune" part of NASIOC.
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Old 09-15-2012, 12:41 PM   #15
neb_subi
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I figured out the problem that one of the injectors wires came out of the plug.
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Old 09-15-2012, 09:48 PM   #16
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Quote:
Originally Posted by neb_subi View Post
I figured out the problem that one of the injectors wires came out of the plug.
Did that too first time I did air pump or something. Never touched them but somehow plug on 4 got loose. Drove 2 hours to the tuner and just thought the roughness was normal with the check engine etc. sounded like a 3 cylinder but never dawned on me till tuner checked the spark timing and saw 4 was off. Wasted over half a tank of gas too in that short drive. Live and learn.
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Old 09-15-2012, 11:46 PM   #17
JhnBrackett
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Thank you for updating what the solution was. Vacuum leak was a great diagnosis though. Get a tune was on the verge of retardation. Only thing you should notice from this swap is a slightly rougher idle at cold startup.
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Old 09-16-2012, 04:36 PM   #18
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Glad to hear you got it figured out.

I'd be surprised if you noticed a rougher idle, even in cold starts.

It's a reasonable theory based on what the TGVs (better atomization) and when (my LGT only has them active at startup (some later models use them more)) but I have yet to hear of a first-hand report from someone who did cold starts with them, did a swap, and did cold starts without them.

One of the guys at LegacyGT.com, who lives in Canada and uses a block heater in the winter, said his car still started and idled just fine with the TGVs removed, even in the winter.

There was a time (and maybe it's still true) that TGVs were a USDM-only thing (or at least, they weren't used in JDM cars). So I'm pretty sure they're strictly for post-startup emissions.

And you don't need a tune for them.

And people create vacuum leaks while doing the delete all the time, so that was my guess too.
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Old 09-16-2012, 04:38 PM   #19
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Quote:
Originally Posted by StealthTL View Post
New gaskets all round, or just re-used the old?
Yeah, since those rubber seals wear out all the time...
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Old 09-16-2012, 04:43 PM   #20
the suicidal eggroll
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Quote:
Originally Posted by NSFW View Post
Yeah, since those rubber seals wear out all the time...
Rubber? OP has an 04 STi, there are no rubber seals in the TGV/manifold area.
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Old 09-16-2012, 06:25 PM   #21
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Quote:
Originally Posted by HinshawWRX View Post
People read too far into the "everything you do needs a tune" part of NASIOC.
this, and its ****ing annoying.



Quote:
Originally Posted by the suicidal eggroll View Post
You don't need a tune for TGV deletes (other than to turn off the codes, and to make sure the extra flow hasn't push you into untuned regions of your map at WOT). Do people forget we run a MAF-based fueling system?
what MAF?

(im sd )
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Old 02-11-2013, 12:26 PM   #22
Booggieman62
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Im getting ready to do the tgv delete i was going to do all the porting myself. Is there anything i need to know i watched a couple videos on YouTube looks pretty easy. But that's YouTube.
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Old 02-11-2013, 03:12 PM   #23
neb_subi
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You dont need to take the whole manifold out. Just unbolt from tgv and pull old ones put and rebolt the fuel rails to it
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