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Old 04-28-2002, 11:53 AM   #1
IMPEZER22
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Join Date: Nov 2001
Location: Williamsport, PA
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95L 2.2T
02 WRX Cobb Stage II

Question hesatation problem

Last weekend I put my custom turbo on my car and im haveing a problem with it hesatating quite a bit from the time it builds boost(around 2K) to about 4K and then it takes off. Any help would be great.

Thanks Chris
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Old 04-28-2002, 02:59 PM   #2
Graham
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You know, my car does this also, but rarely, and only during the daytime when its really hot. I have not idea what it is, but its almost like there is a HUGE amount of timing retard feeling, then the car just resumes its normal power around 4000 RPM. Doesn't really bother me, I just figured it was from the hot weather.

Graham
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Old 04-28-2002, 07:05 PM   #3
STiTuner
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My car does that in NA form.

I alwasy thought that yes it had to do with the weather.

Brad
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Old 04-28-2002, 10:36 PM   #4
IMPEZER22
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Now I've noticed that its doing it sometimes around 5K.
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Old 04-29-2002, 02:08 PM   #5
Scoobie Steve
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Are you using a BOV? If you are it needs to be returned to intake pipe(not to atmosphere). I had a problem with the bov open at part throttle and mapping air that the engine never used, ran very rich!
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Old 04-29-2002, 02:35 PM   #6
Jewbaru
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Quote:
Originally posted by Graham
You know, my car does this also, but rarely, and only during the daytime when its really hot. I have not idea what it is, but its almost like there is a HUGE amount of timing retard feeling, then the car just resumes its normal power around 4000 RPM. Doesn't really bother me, I just figured it was from the hot weather.

Graham
Graham, when my car did that, it was because of a MAP spike, and the ECU was cutting fuel. Check your clamp if you're using one.
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Old 04-29-2002, 06:05 PM   #7
Graham
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That never even crossed my mind Jewbaru!!??

I don't doubt thats a catalyst for this problem, though its not to too too noticable. I thought fuel cut was when the car started bucking and what not?


Graham
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Old 04-29-2002, 07:58 PM   #8
IMPEZER22
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yes i am using a BOV. But im using a pinpong ball to keep it from sucking in air, and i haven't had a problem with it stalling or anything like that.

Chris
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Old 04-30-2002, 10:08 AM   #9
Jewbaru
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Quote:
Originally posted by Graham
That never even crossed my mind Jewbaru!!??

I don't doubt thats a catalyst for this problem, though its not to too too noticable. I thought fuel cut was when the car started bucking and what not?


Graham
If the clamp isn't grabbing hard from the get-go it'll feel like hesitation, or a real sharp drop in spark advance like you described. If you're using a Zener diode, check the soldering job, and hook up a multimeter too it. I eventually broke down and got the SS Voltage Clamp from Tom at Ludespeed.

If the clamp holds, then spikes, the car will stutter, or buck, if the car doesn't even slow the signal from rising, it'll feel like hesitation.
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Old 04-30-2002, 10:09 AM   #10
Jewbaru
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Quote:
Originally posted by IMPEZER22
yes i am using a BOV. But im using a pinpong ball to keep it from sucking in air, and i haven't had a problem with it stalling or anything like that.
Is the BOV is venting to the atmosphere? MAF based cars hate that. Also, what brand are you using? Most good BOVs don't open under vacuum.
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Old 05-01-2002, 10:13 PM   #11
IMPEZER22
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Im using a Talon BOV. But its ok, I fixed the problem. When i had my intake off i overlooked the vacuum line that ran to the FPR. I hooked it up and now it runs a lot better but it still has slite misses here and there through out the power band. Thanks for all the help anyway.

Chris
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