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Old 12-23-2010, 01:11 PM   #1
mygreatgc8
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Member#: 230513
Join Date: Nov 2009
Chapter/Region: MAIC
Location: Warrenton, Va
Vehicle:
2001 rs/wrx/sti swap
black

Default car pulses while driving

i have an 01 rs with a 06 wrx swap, the engine feels like it pulses at 2500 rpms, but if i let off the rpms drop and almost cut out, ive put new gaskets on the intercooler and y-pipes, and checked the hot and cold side, i cannot figure it out, can you help
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Old 12-23-2010, 02:04 PM   #2
BenGSX
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Join Date: Apr 2009
Chapter/Region: BAIC
Location: Elk Grove, CA
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Automatic?
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Old 12-23-2010, 02:23 PM   #3
mygreatgc8
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Join Date: Nov 2009
Chapter/Region: MAIC
Location: Warrenton, Va
Vehicle:
2001 rs/wrx/sti swap
black

Default

no, ver 1 sti man
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Old 12-23-2010, 06:14 PM   #4
AKSubieDubie
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Location: Fairbanks Alaska
Vehicle:
2000 RSTi BW8375
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how long / frequent are the durations? if it's like a power surge for one sec, goes away for a second, comes back for a second, repeats ... its probably your o2 sensor =)
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Old 12-24-2010, 09:42 AM   #5
mygreatgc8
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Join Date: Nov 2009
Chapter/Region: MAIC
Location: Warrenton, Va
Vehicle:
2001 rs/wrx/sti swap
black

Default

It does it when it when it warms up
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Old 12-24-2010, 11:49 AM   #6
cruisnhard
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Chapter/Region: MWSOC
Location: Wisconsin
Vehicle:
2008 Impreza WRX
Silver

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map or maf?
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Old 12-24-2010, 11:52 AM   #7
mygreatgc8
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Member#: 230513
Join Date: Nov 2009
Chapter/Region: MAIC
Location: Warrenton, Va
Vehicle:
2001 rs/wrx/sti swap
black

Default

...maf
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Old 12-24-2010, 02:08 PM   #8
mygreatgc8
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Member#: 230513
Join Date: Nov 2009
Chapter/Region: MAIC
Location: Warrenton, Va
Vehicle:
2001 rs/wrx/sti swap
black

Default

Now it shuts off at idle, could it be a fuel pump
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Old 12-24-2010, 04:21 PM   #9
cruisnhard
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2008 Impreza WRX
Silver

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if its maf how is your blow off valve routed?

Are you atmospheric or recirc?
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Old 12-24-2010, 05:14 PM   #10
mygreatgc8
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Member#: 230513
Join Date: Nov 2009
Chapter/Region: MAIC
Location: Warrenton, Va
Vehicle:
2001 rs/wrx/sti swap
black

Default

Stock recir valve routed to stock hose, has been tunned 3months ago
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Old 12-24-2010, 08:42 PM   #11
mygreatgc8
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Join Date: Nov 2009
Chapter/Region: MAIC
Location: Warrenton, Va
Vehicle:
2001 rs/wrx/sti swap
black

Default

As well it the throttle duty percentage is all over the place, and when I stop after driving runs rough and shuts off, and throws every misfire code ass well as pfffe and pffff
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Old 12-24-2010, 08:51 PM   #12
mygreatgc8
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Member#: 230513
Join Date: Nov 2009
Chapter/Region: MAIC
Location: Warrenton, Va
Vehicle:
2001 rs/wrx/sti swap
black

Default

And could it be the wastegate solienoid, I've had it tuned with a machV electronic boost solenoid three months ago, this just started on the 20th of dec
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