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#1
08-01-2005, 11:38 PM
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ohhhhh Sh*t
ok i drive a 97 gst and i just posetd a thread on my anti lock break light, well this has happened a coupple of time but here the story, somtimes when i gun it in 2nd 3rd or even 4th i hit like 4.5 rpm's then my car jerks to the ground as if i let off the gas and got back on it?????? whats going on its so weird is my stock pos t-25 going to die or what!?!?! i have no idea what it is??
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#3
08-02-2005, 12:11 AM
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Re: ohhhhh Sh*t
Are you running stock boost? Sounds like fuel cut to me.
__________________
95 GSX:FMIC, 6-bolt, evo 3 16g, 2600 act clutch, 1g bov (crushed), and a 3" turbo back exhaust, dsmlink, dks 272 cams, wideband 02, Coming soon 2.3L Stroker, 1mm oversized valves, crower sprigs. 91 TSI AWD auto, gm 3.5 maf, maft, fmic, emanage, profec e-01, 3" turbo bk exhaust +more little stuff. http://www.ratemydsm.com/member/ez1286/?member=ez1286  
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#4
08-02-2005, 02:17 AM
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Fuel cut. It kinda feels like you're going along smoothly, then you suddenly hit a brick wall, and keep going. It's fuel cut.
__________________
1990 Eagle Talon TSI AWD MOD LIST: ______________________ Mitsubishi s16g, Turboback 2 1/2 in. w/ Hi-Flow Cat, ACT 2600 Clutch, K&N Filter, Taylor 10.5 mm Spark Plug Wires, BPR7ES Plugs, Dejon Tool UICP, Turbo XS Type H BOV, Samborskey Shift Kit, Walbro 255lph, Injector Clinic 550's, 2g mas, Vaccum line elimination, SAFC II, Pocketlogger, 17" Motegi Gloss Black Rims, VIS Carbon Fiber Hood, Eibach Lowering Springs, KYB AGX, Homemade boost controller, Autometer Boost/Air Fuel
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#5
08-02-2005, 12:00 PM
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If you're hitting fuel cut with the t-25 it's because something has gone wrong. I'd guess the car is assuming more air than there actually is, because of a leak somewhere.
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I used to own a DSM. Quote:
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#6
08-02-2005, 03:10 PM
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Re: ohhhhh Sh*t
I can almost guarantee %100 that its not fuel cut. No matter what boost you run, the t25 wont flow enough air for the ecu to even THINK about activating fuel cut.
Most stumbling problems like that are caused by ignition-related gremlins. What kind of spark plugs are you running? I say check your plugs, make sure they are ok and that they are gapped correctly. Check your plug wires and make sure there is no arcing. It wouldn't hurt to do a boost leak test either.
__________________
 95 GSX DSMlink, "50 Trim", and track times coming VERY SOON! 
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#7
08-02-2005, 03:14 PM
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Re: ohhhhh Sh*t
I have something similar going on with my car... I just changed the wires and plugs, so I dont know, but it is boost related for sure. At times at WOT, the car pulls like its on steroids. Other times, it stumbles and though the boost guage reads 10 psi (where i set it), the car accelerates as if it were an NT, with stumbling and slight jerking.
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 The daily driver.
The weekend cruiser.  The lazy shop hog. 
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#8
08-02-2005, 03:46 PM
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Re: Re: ohhhhh Sh*t
Quote:
Are you doing any datalogging? It could be that your getting some knock and the ecu is pulling back timing. Even a few degrees of timing pulled makes a huge difference and also feels kinda like the car is stumbling. Hook up a logger and see if this is the case.
__________________
95 GSX DSMlink, "50 Trim", and track times coming VERY SOON!
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#9
08-02-2005, 04:26 PM
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Re: ohhhhh Sh*t
I'm not running a logger as yet, but you could be right. I just checked my spark plug well, and there was a puddle of oil collected there. The car does make a knocking/ticking (not injector or lifter tick, different kind) sound on acceleration, almost as if a cylinder is not active. I'm going to get that checked soon.
__________________
The daily driver.
The weekend cruiser. The lazy shop hog.
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#10
08-02-2005, 05:04 PM
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speaking of the anti-lock...I recently noticed that my fuse was missing in the fuse box under the hood. Does this mean that my anti-lock is not being activated or is screwed up? Thanks
__________________
 05 Srt4 Agp 3147 w/supporting mods  97 Mx-5 T28, hks man, ebay int/pipes, rfl bov, xtd 6 puck, 3" magnaflow, msd timing box,
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#11
08-03-2005, 04:52 PM
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For the first question, if it is a sudden and complete loss of acceleration that could be fuel cut (if you have upgraded parts). For the car that's getting messed up at about 10psi, if you are running iridium plugs they could be your problem. I had the same exact thing happen. I put in brand new iridium plugs and it still happened. I put in the $2.00 NGK plugs and it worked perfectly. Even if they are brand new plugs, get some NGK stock plugs and put them in (it's only like $10.00). That problem drove me nuts for over a month. It was intermitent like you described. Fuck Iridium plugs.
tedX
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I'm>everything
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