Question about 2003 Subaru Impreza

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Occasional loss of power and juddering in my subaru impreza

Occasionally when im driving i get total loss of power for a few seconds, or when i put my foot down the car will judder and the revs come and go for a few seconds. when this happens, the car will also cut out if i stop. it will start again and be fine for a while and then do it again. most of the time it drives fine and the power is ok. my car is a 1998 subaru impreza turbo terzo.
p.s the fuel pump was replaced by the previous owner in april this year.

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  • vsaldarriaga Apr 18, 2009

    My impreza 1997 is suffering from the exact same problem. Dealer has tried evertything they can think of: changing sparkplugs/cables, messing with the timing, cleaning the intake throttle assbly...



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I would plug in a car code reader , apart from that get a multimetre then check the coil , ht leads plugs , fuel injectors and so on , if you don't know how to do any of this then go and get a auto car electrican . Good luck colin

Posted on Jun 16, 2017


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: Knocking/juddering when taking off in first gear subaru impreza 1

Sounds like warped fly wheel.

Posted on Dec 03, 2008

  • 1 Answer

SOURCE: when i put the foot on the gas hard it starts to judder.

i had a similar problem with a 626 some years ago ,i replaced the H.T leads and this cured the problem hope this is of use to you

Posted on Mar 07, 2009

  • 58 Answers

SOURCE: turbo 2ooo i think it might be some sort off bushes

juddering is UK english for shuddering in US english. The center bearing shouldn't move, i/e/ the shaft should rotate w/o side play in the bearing, but the rubber mounts for the bearing should be flexible. The needle bearings in the universal joints in the front to rear drive shaft can go bad, causing noise when accelerating and they're not changeable w/o special tools. Your problem also sounds like differential, which would mean that you need to change the gear oil in the rear differential. As the oil ages it stops working properly in the limited slip differential even if visually OK. Do the front differential at the same time, engine heat ages it even faster. The center diff is in the AT, so you would change the AT filter and fluid.
How to tell which problem you have... in a parking lot with dry pavement, stop the vehicle, turn the wheel hard right, accelerate a moment, and repeat hard left and centered. If its worse turning, than straight suspect the differential fluids first. If its the same turning or not and especially if its the same on wet or dry pavement and at slow and high speed then look into the propeller shaft first.

Posted on Apr 06, 2009

  • 41 Answers

SOURCE: I have a 1.8T golf gti mk4, last night is juddered

im willing to bet that you had a coil pack fail on you. they are one of the most common failures on the 1.8t engine. another thing i would check is for any boost hoses that may have popped off if you were accelerating quickly.

but before you go and buy a new coil pack. unplug your maf sensor and see if it runs any better than before. if the problem goes away when you unplug you maf then the mass air flow sensor is bad. but if its the same then you have a bad coil pack.

Posted on Jul 11, 2009

  • 5568 Answers


Most likely you have one or both front disks warped. To reduce weight, disks have gotten thinner and warp fairly easily from heat buildup.
If the disk(s) are not too badly worn or too thin, it may be possible to resurface them to improve the flatness but in most cases, it makes better sense to replace them.
I would check Brembo to see if they make replacement disks for your car; I have had good service from them, better than OEM disks.

Posted on Sep 01, 2009

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