boosted svt miss at 52-5500 rpm in second third and fourth?????? - Focus Fanatics
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Old 05-14-2009, 01:58 AM   #1
04yellowsvt
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boosted svt miss at 52-5500 rpm in second third and fourth??????

I just recently boosted my 04 svt it has professional tune 44lb hr fuel injectors, t3/t4 externally wategated turbo. When i go from a stop it pulls hard in first when i shift to second it still pulls hard but it misses 2 or 3 times it does it in 3rd and 4th too i upgraded the coil, new wires and sp463 plugs i was wonderin if anybody else has had this problem and kno how to fix it. And i just put a dry shot of nos on it with 7psi of boost and was wonderin what whould b a safe shot for the nos.


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Old 05-14-2009, 04:12 AM   #2
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What is the gap of the plugs set to ? should be in the .030 to .035 range

Do you have a J&S Safeguard

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Old 05-14-2009, 07:13 AM   #3
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J&S will help pull timing if things get out of excellent conditions.

Also, what were your a/f ratio like during the pulls? A couple of hard pulls and the engine can start to lean out.

Personally, I'd up the boost over nitrous any day on a boosted application. Unless your using the nitrous to help "cool" the intake charge because you aren't intercooled.
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Old 05-14-2009, 08:26 AM   #4
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My plug gap is .032 and im not sure what J&S is my a/f ratio stays at 10.9 under boost no matter. What the miss gets better if i have a battery charger hooked up and turned on when making dyno pulls and the NOS is more for show than any thing i had it laying around from before i boosted just wondered what would b safe if i decided to use it.
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Old 05-14-2009, 12:04 PM   #5
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Sounds like its missing when the DSI opens up.
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Old 05-14-2009, 01:01 PM   #6
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You should get a J&S Ultrasafeguard first and formost....Yellow Foci have ahabit of popping motors w/o them...Where are u in Ohio???
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Old 05-14-2009, 03:48 PM   #7
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coshocton north of zanesville. what is the j&s ultrasafe gaurd?
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Old 05-14-2009, 04:54 PM   #8
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Sorry missed that question...http://focus.c-f-m.com/index.asp?Pag...OD&ProdID=1159
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Old 05-14-2009, 05:05 PM   #9
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BTW Bring that thing to Spring into Focus in Columbus on May 24th, we can compare...should be at least two other turboed SVTs there
http://www.focusfanatics.com/forum/showthread.php?t=190956
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Old 05-14-2009, 05:17 PM   #10
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We can also datalog your car and see whats going on while we are there at SIF.
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