Subaru Impreza Forum

scoob · 24 Aug 2005, 07:29 PM

Hello im new to all this. i have only had my 98 impreza about 2 months now and the knock sensor has gone and i just wanted to know how much i will be looking to pay for a new one. also will i be losing any performance from it. thanks for any help :wink:

bob · 24 Aug 2005, 07:34 PM

You will not lose performance. But if you do get any knock then the ignition will not retard and could cause an engine failier.

scoob · 24 Aug 2005, 07:39 PM

oh great its been like it for about 5 weeks. the car stutters does that sounds bad. thanks for you quick reply

buzz · 24 Aug 2005, 07:40 PM

Hi scoob, welcome to the site, as bob says and best get it replaced before anything happens, Your car will still be drivable just dont give it any welly until you replace it :wink:

Buzz

bob · 24 Aug 2005, 07:42 PM

Quote:

Originally Posted by scoob

oh great its been like it for about 5 weeks. the car STUTTERS does that sounds bad. thanks for you quick reply

This is not the knock cencer. discribe Stutters?

scoob · 24 Aug 2005, 07:49 PM

well the engine light keeps coming on then going out again so i had it put on the dyno and it came up saying knock. when i say stutter i mean when im driving along an sitting at say 30 the car will just hold back then it'll be alright then it'll do it again but if i boot it it'll be fine and you wouln't know anything was wrong

buzz · 24 Aug 2005, 07:56 PM

Sounds like it could be the maf sensor :roll:

Buzz

bob · 24 Aug 2005, 07:58 PM

If the ECU says Knock then this is a thing you should replace before giving the car to much full throttle. The surging is something else. Could be a number of differant things. Sounds like you are running rich then weak when holding throttle. Lambda sencer or maybe maf. worth getting it checked out though.

scoob · 24 Aug 2005, 08:06 PM

ok thanks to both of you for your help. i will get the knock sensor fitted and go from there.

dieard · 04 Sep 2005, 05:28 PM

did you get your knock sensor fitted? i got mine from foresters £53, fitted myself, worked lovely jubbley

scoob · 06 Sep 2005, 07:32 PM

no i still have not got round to getting one yet. where did you get your's from. was it hard to fit and how long did it take you. another Q, i just bought an earth kit sunday from trax and want to know if any one else has fitted it and where the best place's to fit them earth cables thanks

24 Aug 2005, 07:29 PM	#1 (permalink)
scoob Fresh Scooby Join Date: Jul 2005 Posts: 37	knock sensor Hello im new to all this. i have only had my 98 impreza about 2 months now and the knock sensor has gone and i just wanted to know how much i will be looking to pay for a new one. also will i be losing any performance from it. thanks for any help :wink:
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24 Aug 2005, 07:34 PM	#2 (permalink)
bob Senior Scooby Join Date: Jul 2004 Location: Bristol UK Posts: 1,547	You will not lose performance. But if you do get any knock then the ignition will not retard and could cause an engine failier.
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24 Aug 2005, 07:39 PM	#3 (permalink)
scoob Fresh Scooby Join Date: Jul 2005 Posts: 37	oh great its been like it for about 5 weeks. the car stutters does that sounds bad. thanks for you quick reply
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24 Aug 2005, 07:40 PM	#4 (permalink)
buzz Veteran Scooby Join Date: Apr 2004 Location: shropshire Posts: 3,565	Hi scoob, welcome to the site, as bob says and best get it replaced before anything happens, Your car will still be drivable just dont give it any welly until you replace it :wink: Buzz
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24 Aug 2005, 07:49 PM	#6 (permalink)
scoob Fresh Scooby Join Date: Jul 2005 Posts: 37	well the engine light keeps coming on then going out again so i had it put on the dyno and it came up saying knock. when i say stutter i mean when im driving along an sitting at say 30 the car will just hold back then it'll be alright then it'll do it again but if i boot it it'll be fine and you wouln't know anything was wrong
Offline

24 Aug 2005, 07:56 PM	#7 (permalink)
buzz Veteran Scooby Join Date: Apr 2004 Location: shropshire Posts: 3,565	Sounds like it could be the maf sensor :roll: Buzz
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24 Aug 2005, 07:58 PM	#8 (permalink)
bob Senior Scooby Join Date: Jul 2004 Location: Bristol UK Posts: 1,547	If the ECU says Knock then this is a thing you should replace before giving the car to much full throttle. The surging is something else. Could be a number of differant things. Sounds like you are running rich then weak when holding throttle. Lambda sencer or maybe maf. worth getting it checked out though.
Offline

24 Aug 2005, 08:06 PM	#9 (permalink)
scoob Fresh Scooby Join Date: Jul 2005 Posts: 37	ok thanks to both of you for your help. i will get the knock sensor fitted and go from there.
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04 Sep 2005, 05:28 PM	#10 (permalink)
dieard Regular Scooby Join Date: Apr 2005 Location: Wrexham (north Wales) Posts: 121	did you get your knock sensor fitted? i got mine from foresters £53, fitted myself, worked lovely jubbley
Offline

06 Sep 2005, 07:32 PM	#11 (permalink)
scoob Fresh Scooby Join Date: Jul 2005 Posts: 37	no i still have not got round to getting one yet. where did you get your's from. was it hard to fit and how long did it take you. another Q, i just bought an earth kit sunday from trax and want to know if any one else has fitted it and where the best place's to fit them earth cables thanks
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