Acceleration hesitates, then surges

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Jan 23, 2004 | 10:27 PM

TheWickedWRX

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Help? Help!

I have a wrx with allot of modification. Every once in a while, I floor it once I'm already at 3000 RPM in in 1st, 2nd, 3rd gear, 4th... and my exhause sounds reallllly looud and makes a gurgeling noise. The car also accelerates wierd. It feel real fast when I start to floor it, and then it like slows down, and then lunges forward and slows down and keeps doing it. I dont know what that is, it only does it once in a while. It comes and goes. I took it to Turbo Tricks Racing in NJ and every time I take it to them, it stops doing it...I get it back, its fine. . . then it does it again. The CEL light flashes when I do it...but my laptop is broken and I cant check it.

Jan 23, 2004 | 10:49 PM

qwk_wrx

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From: Rohnert Park

Car Info: 05' Evo 8

sounds like your boost might be spiking....not sure tho

Jan 24, 2004 | 08:10 AM

TheWickedWRX

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That is what I think...what should I do, buy all nex vaccum line and replace the old ones? I hears something about using carberator cleaning fluid to find a leak...

Thanks

Joe

Jan 24, 2004 | 11:14 PM

Wingless Wonder

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From: Sacramento CA

Car Info: 02 Impreza WRX sedan

Quote:

Origami posted by TheWickedWRX
Ross Racing Pistons, Paeuter Rods, Turbo XS FMIC, Injen CAI, Turbo XS up/down pipe, hks hi-power exhaust, turbo xs u-tec, short shifter, rota subzero rims, engine grounding kit, hks type 1 turbo timer.

No engine management for these mods?

EDIT: It helps to use an appropriate Subject line for your thread.

--
0==WW==0
"…axles of evil…" - george w. bush

Last edited by Wingless Wonder; Jan 24, 2004 at 11:16 PM.

Jan 25, 2004 | 09:16 AM

TheWickedWRX

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I have the turbox xs utec dyno tuned

Jan 25, 2004 | 10:46 AM

simpwrx02

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my buddy has the same problem in his wrx he says that it is his car misfiring the check engine light flashes it is only when he gets on it. his wrx hasnt been dynotuned yet however.

Jan 25, 2004 | 10:48 AM

Speed Element

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From: San Jose

Car Info: Evo X, 04 STI, 335i, Fit

CEL flashing would indicate knock, do you have a boost gauge? are you over boosting above your dyno tuned setting? Perhaps you were tuned in the summer a little close to the edge and now with the colder temps your boosting a little more than expected?

Perhaps you should borrow a laptop and run some logs!

Mike

(510) 487-4447
www.mpjperformance.com
www.gb-motorsports.com

Jan 25, 2004 | 07:09 PM

TheWickedWRX

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I am boosting at a constant 18 lbs... It was tuned for it. The boost was spiking...so I looked for the leak. I found a small crack in the plastic vaccum line going from the back of the gauge to the engince comparment. I disconnected the gauge and blocked off the line. I took it for a ride....It drove beautifully...and the I turned it off. I drove it again like 30 min later...the problem came back. It accelerated good when I give it some gas....then floor it. WHen I just floor it from the start...the problem is back. I dont understand this ****. I spent so much money on this car, and the probles keep on coming. I would use the ecutek logger and show you people my logs when the problm starts....but my laptops lcd screen is busted. And the ****ty part it...I have no job yet. I just lost my old job so I have no money to get the car looked at.

Jan 25, 2004 | 11:26 PM

qwk_wrx

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From: Rohnert Park

Car Info: 05' Evo 8

are you running 18lbs on stock internals constantly....recommended max on stock is around 15.5-16lbs...

Jan 26, 2004 | 08:09 AM

#10

TheWickedWRX

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Im running the 18 lbs on ross racing pistond custom made in cali, and paeuter racing rods...

Jan 26, 2004 | 12:16 PM

#11

mmboost

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From: Longing for my ol' white '02 WRX :(

Car Info: 2016 Acura RDX ... meh. Um, nice subwoofer?

Well, time to stop complaining, and like Mike said, start logging. If you don't see any visually identifiable hysical problem you gotta find out what the computer's responding to. Go to that shop you spoke of and see if you can rent/borrow a logging tool... or make a friend on i-club

jason

Jan 26, 2004 | 01:43 PM

#12

TheWickedWRX

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If there is anyone here that has a laptop in the central nj area, and is willing to rent it to me or let me borrow it...please let me know. I would use my laptop...but I broke the monitor.

I have the ecutek deltadash logging software already...

I just need a laptop with a printer port and a 9 pin serial port...

Thanks, Joe

Jan 26, 2004 | 06:56 PM

#13

RacerZ22

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sounds to me like your over boosting, or spikeing as well. cant really think of anything else that would make that happen and then go away every once and a while.

Jan 26, 2004 | 06:58 PM

#14

TheWickedWRX

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can cel 1400 make my problem come and go?

Jan 26, 2004 | 07:02 PM

#15

DarkAngel

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From: SF Bay

Its prob your spark plugs or your coil pack. I had the same problem and it was a bad coil pack and its fine now. Basically you are running on 3 or even 2 cyl and its not that great for your car. It was also same with mine. It would be fine for a while than it would happen again. Its while its not jerking around the sparks are actually fireing but very weak, bc they are dirty or just bad. Hope that helps