Had me some fun last night, but something happened that has me concerned. This happened 2 times last night out of a lot of times. When I launched it last night, my car stuttered and I heard a couple of soft faint boom boom. There's no smoke at all coming from tail pipe and this only happend twice last night. All the other times it doesn't happen. When I was on the highway and kept dropping it to 4th at wot at 7psi, it runs like a bat out of hell. Then other times when I launched it at wot, it doesn't happen. Could it be my spark plugs?

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"Tell them of us and say,
For their tomorrow,
We gave our today."
-- The Kohima Epitaph

or you could be running too rich

96RS ~ full 99GS Special Edit. body conversion, aem cai, greddy header, afx pulley, B&M SS, magecores & NGKs, A/F and Volt guages, Sparco Torino Seat, illuminas, prokits, ingalls camber, gunmetal GS rims, ST Sways, STBs, lower rear tie bar, Sony Xplode head, Xplode 10 disk, Boston Components, 2 Kenwood amps, 12" MTX sub, a shit load more.


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96 RS


97 GSX

Make sure your fuel mapper has a good connection to your MAP sensor. After that check that your plugs are good and your wires are good. ANd running rich can also do that to you like Kory said. Make sure you are not running too rich. Running rich does cause backfires sometimes.

Dave
05 Ford F150 SuperCrew FX4

at 7psi I'm running no more than 95psi of fuel pressure at wot. The a/f guage shows from .92 sometime to .94. What should my fuel pressure be and the ideal o2 voltage at that psi of boost?

intricatelines.com/ -graphics and vinyls

"Tell them of us and say,
For their tomorrow,
We gave our today."
-- The Kohima Epitaph

Ok guys this is weirder. When it does stutter it only stutters on 2nd gear at WOT and the a/f shows .98 sometimes and .92 sometimes. On the highway it's a killer. on 4th and 5th gear it shows .90-.91 at wot. What should I do?

intricatelines.com/ -graphics and vinyls

"Tell them of us and say,
For their tomorrow,
We gave our today."
-- The Kohima Epitaph

bump!

and BOOOM! it happened.

intricatelines.com/ -graphics and vinyls

"Tell them of us and say,
For their tomorrow,
We gave our today."
-- The Kohima Epitaph

Something was wrong. If it stuttered at WOT, it was either because you had already broken something, or because something was fucked up concerning your fuel system or your boost control.

The only time i ever stuttered at WOT was due to overboost from an incorrectly plumbed wastegate. too much air, not enough fuel = cracked pistons.

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'97 Talon ESi-T (poor impulse control)
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'13 Evo X (mostly stock)
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