#52346, "WTF is my car doing @ 2 psi boost?????????????"
this just started today towards the end of a 2 hour road trip. every time i slowly enter boost (not putting it to the floor), at 2 psi my car jerks/studders very hard. i think if i stayed at 2 psi, it would keep jerking, but its not a little passive jerk, it feels as if i've been rear-ended at 5-10mph. if i enter boost faster or put it to the floor, its fine and i dont notice any jerk. everything else is fine:EGT, fuel pressure, A/F, and no new codes! What gives????????
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#52355, "RE: WTF is my car doing @ 2 psi boost?????????????" In response to Reply # 2
wastegate shouldnt be getting stuck, its not set to open till 7-8 psi and i have a modded stock wastegate, plus the jerking doesn't happen every time. Not using a FCD, i have the missing link (unless thats still considered a FCD)
USED TO HAVE...Everything you wish you had, and then some...
You are somebody special Tim, you matter! - from the admins (but nobody likes you, because your username is just like that other guy's, and you whine a lot)
#52356, "RE: WTF is my car doing @ 2 psi boost?????????????" In response to Reply # 0
sounds like your MAP is momentarily seeing boost for some reason. do u have a missing link? 1997 Silver RS Wiseco 8.8:1 Pistons(back to low compression!) Eagle Rods T3/T4 Turbo Custom FMIC Greddy Exhaust 440's Most current 1/8th mile time: 8.3@90mph 2.015 60'(Nitto Drag radials, i suck)
#52360, "RE: WTF is my car doing @ 2 psi boost?????????????" In response to Reply # 4
yes, see above. isn't there a new style that actualy sets into the hole on the intake?
USED TO HAVE...Everything you wish you had, and then some...
You are somebody special Tim, you matter! - from the admins (but nobody likes you, because your username is just like that other guy's, and you whine a lot)
#52368, "RE: WTF is my car doing @ 2 psi boost?????????????" In response to Reply # 5
could be as simple as your fuel getting too rich for an instant. depending of the disk you have on your fmu. the fuel rise curve could be set pretty steep and going into boost slowly will not add the sufficient air fast enough for the fuel that starts to go into the car.. happens to me sometimes also...
-97 GS (First project, 299 whp)(sold) - 97 RS 2.6 last numbers: 306hp, 352tq @16psi (Dead, parted out) - 99 GS OZ, Hahn Kit, 56k miles (Sold) -------- - 00 Nissan Maxima GLE (Daily Driver) - 02 Audi A4 1.8T Quattro
#52409, "RE: WTF is my car doing @ 2 psi boost?????????????" In response to Reply # 8
know what my car does the same thing. When I give it a little pedal it kinda jerks back and stuff like its losing power. But when I floor it doesn't do it. It might be fuel related, like maybe not getting enough fuel. I've noticed with a 10:1 disc I can lean the mixture by just not giving it a lotta throttle and its getting like 2 psi of boost, I managed to get the EGTs to like 1550. But when I floor it dang thing goes full rich and the egts come down.
http://www.hadesomega.info -car specz and movies 95 Eclipse RS | 76' 280Z | 89' MR2 | 99 Neon | 91 Zephyr Who sez FF can't drift?
#52453, "RE: WTF is my car doing @ 2 psi boost?????????????" In response to Reply # 9
Seems like I have the same problem too, besides the bad coil pack and maybe broken fuel pressure guage. My car runs rich. I have the craptech. Everytime I boost real high from 1st gear, the engine gets flooded with gas and I'll start misfiring. If I set the rise rate too high, it'll throw a CEL. I have 30ib injectors and have idle at 30psi. Only way it won't throw a lean code. Now I need new coil pack, new fuel pressure guage I think, and a new kind of fuel management. Sorry for the hijack but I have same problem and not sure what to do. SFMU, bigger injectors and safc anyone?
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