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Old 04-29-2004, 10:59 PM   #1
87rx
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Member#: 40423
Join Date: Jul 2003
Location: portland
Vehicle:
1998 2.5rs
wrc blue

Default ej25 hesitation

I have a 98 2.5 rs with 60k on it that since february has been hesitating when I am accelerating from a stop.
I only feed it super, and have replaced the plugs, oil/filter,fuel filter,air filter,de wetter treatment,injector cleaner, and switched fuel brands.
does anybody have any insight to this issue?
thanks
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Old 04-30-2004, 11:28 AM   #2
DrBoy01
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Member#: 20444
Join Date: Jun 2002
Chapter/Region: MAIC
Location: Wilmington, DE|Berkeley
Vehicle:
2006 Outback 2.5 XT
Garnet Red Pearl 5MT

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You might want to look into replacing the ignition wires with a new set of OEMs. Sometimes they tend to start going around 60k so that could be a problem.

Also, you might want to check out the ground mod here. Though it's specifically intented to eliminate mid-range hesitation, I found that it made the whole powerband smoother. Also, try cleaning some of your grounds, as well.

Do you have any mods?
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Old 04-30-2004, 07:41 PM   #3
Honkey3k
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Join Date: Jan 2004
Chapter/Region: BAIC
Location: Chico, Ca
Vehicle:
SOLD CGM 2005 2.5RS
35 PSI -- in my tires

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STP Fuel Injector Cleaner, STP Complete Fuel Maintenance and STP Gas Treatment
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Old 05-01-2004, 02:22 AM   #4
tre36
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Member#: 36707
Join Date: May 2003
Location: Kent, WA
Vehicle:
03 SG5

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Have you ever changed your PCV? This is one thing that is often overlooked. Stuck or clogged PCVs causes hesitations and not to say contaminates your engine.
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Old 05-03-2004, 02:10 PM   #5
87rx
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Member#: 40423
Join Date: Jul 2003
Location: portland
Vehicle:
1998 2.5rs
wrc blue

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thanks for the replys, Ill try the grounding fix.
new wires too.
no mods yet, but big plans I also have a 87 rx project that needs work.
thanks for pcv idea.
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Old 05-04-2004, 01:03 PM   #6
red22
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2002 Impreza
black

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i have a 02 rs manual that does the same damn thing since a couple of months after i bought it new and no one at the subaru dealership can find anything wrong with it. It has trouble most mornings with first and second gear. can't help you out though
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Old 05-05-2004, 12:00 PM   #7
Oquipah
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Join Date: Aug 2001
Chapter/Region: MAIC
Vehicle:
1998 Legacy GT
Silver

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I just had the same thing on my 2.5GT.

Replaced the plugs, wires, fuel filter, air filter and PCV.

Get your system pressure tested...could it be a head gasket issue?

Mine was.

peace,
Oquipah
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Old 05-05-2004, 09:36 PM   #8
maddbmxjumper
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Chapter/Region: Tri-State
Location: wappingers falls/ kingston
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01 sedona red ej20
stage 3 vf23 rs

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possible rear o2 sensor bad?? i had that prob but with a check engin light
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Old 05-06-2004, 02:42 AM   #9
joefocker20
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Chapter/Region: RMIC
Location: Colorado Springs, CO
Vehicle:
2004 STI
Silver

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Ditch your PCV and get a catchcan, get NGK wires and plugs, fuel filter, air filter, and a fresh front 02 Sensor. I'd also replace every single vacuum line. If our fuel pumps have a sock, replace that also.
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