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Bad knock sensor

 
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Old 06-13-2010, 06:44 AM
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Icon8 Bad knock sensor

Ok so another problem for me .. CEL23 ( knock sensor ). When I drive with the sensor , the car feels bad ( lower power , hesitation on 3000rev, timing ). Now I am without it and car feels much better ( no hesitation , no timing... ) , but when the engine light came on , the same problems occurs .
I have check the market for knock sensor and the prices are from 40$(aftermarket) to 140$ (stock). I really do not want to buy one and have the same problems. On many tuned/chipped ECUs the knock sensor is disabled , so I wonder if I can drive without it , only to clear this error in the ECU? I am driving with super unleaded fuel only (100RON). So is there any danger for my engine? Any suggestions what to do ?
I am not so sure , but I think my engine went a little bit noisier after I removed the knock sensor. For now there aren't any knocks on the block ... for now!

The car is H22A with OBD1 p13 ( swapped from H23A2 ).

Any advice will be highly appreciated
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Old 06-13-2010, 07:24 AM
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Re: Bad knock sensor

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Originally Posted by instruktor View Post
Ok so another problem for me .. CEL23 ( knock sensor ). When I drive with the sensor , the car feels bad ( lower power , hesitation on 3000rev, timing ). Now I am without it and car feels much better ( no hesitation , no timing... ) , but when the engine light came on , the same problems occurs .
I have check the market for knock sensor and the prices are from 40$(aftermarket) to 140$ (stock). I really do not want to buy one and have the same problems. On many tuned/chipped ECUs the knock sensor is disabled , so I wonder if I can drive without it , only to clear this error in the ECU? I am driving with super unleaded fuel only (100RON). So is there any danger for my engine? Any suggestions what to do ?
I am not so sure , but I think my engine went a little bit noisier after I removed the knock sensor. For now there aren't any knocks on the block ... for now!

The car is H22A with OBD1 p13 ( swapped from H23A2 ).

Any advice will be highly appreciated
Hi,

I had a knock sensor problem and it caused all kinds of issues.
Mine didnt even show up on the check engine side, bc it was intermittently failing due to coolant leaking on it.
Replace it.
it will stop all of the 3K power issues, and will feel like a sports car again.
you could try to replace the ecu w/ a p72 or p28, but that alone would pay for the right part for the car, if thats the code your getting.
just fix it w/ an oem one and save yourself the headache and running issues.
-Brian
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Old 06-13-2010, 08:53 AM
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Re: Bad knock sensor

Actually come to think of it, I'm having much the same problems. Loss of power, hesitation, etc. Although my ecu is supposed to advance the timing, which may be setting off the knock sensor, I dunno.

Unfortunatly I do not have the kind of access to the software I usually have at school, so where exactly is the knock sensor? And how would I test it? I have access to a DMM, not an oscilloscope...
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Old 06-13-2010, 09:47 AM
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Re: Bad knock sensor

You can just disconnect it and check if it feels better ( like mine ). The knock sensor is right to the oil filter ( very **** place ).

To the question ... here in Bulgaria ( somewhere in EU ) I have found 2nd hand knock sensor for about 110 USD !?!?!? . I can bid on this HONDA CIVIC ACURA RL VIGOR PRELUDE INTEGRA KNOCK SENSOR: eBay Motors (item 130388557125 end time Jul-02-10 21:59:48 PDT) and the total amount will be 61USD. So what do you (briand354) think for it. Is it good offer or another junk in eBay?
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Old 06-13-2010, 04:34 PM
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Re: Bad knock sensor

Quote:
Unfortunatly I do not have the kind of access to the software I usually have at school, so where exactly is the knock sensor? And how would I test it? I have access to a DMM, not an oscilloscope...
Props to you for even knowing what an oscilloscope is.

And I'm pretty sure if you just disconnect it on an OBD2 motor, it will throw the code continually instead of intermittently. That's why when you run the P28/P72 (OBD1), you can just disable the KS function without any problems.
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Old 06-13-2010, 04:54 PM
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Re: Bad knock sensor

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Originally Posted by dbd6604 View Post
Props to you for even knowing what an oscilloscope is.

And I'm pretty sure if you just disconnect it on an OBD2 motor, it will throw the code continually instead of intermittently. That's why when you run the P28/P72 (OBD1), you can just disable the KS function without any problems.
What if I just replace it?
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Old 06-13-2010, 05:10 PM
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Re: Bad knock sensor

If a faulty knock sensor was causing all the problems you were having, you'd probably be pretty relieved I'd imagine. lol You can go for it, and if it wasn't the problem, well, at least you have a new knock sensor and one less thing to worry about while trying to get your Lude running right.
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Old 06-14-2010, 09:21 AM
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Re: Bad knock sensor

Can someone tell me how to clear CEL23? I will not put another knock sensor , so need to clear this error.

Thanks.
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Old 06-14-2010, 09:34 AM
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Re: Bad knock sensor

disconnect the battery neg side for about 10 minutes ,
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Old 06-14-2010, 09:59 AM
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Re: Bad knock sensor

Already done it... doesn't fix the error. After I go over 3500rev the CEL comes :(
Still searching for the solution...
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Old 06-14-2010, 11:41 AM
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Re: Bad knock sensor

if your not going to put another knock sensor ,your check engine light will stay on even after resetting your battery ,the reason is because the ecu goes into open loop were the missing sensor is going to be out of the loop and triger no signal for closing the loop or completeing the circuit ,this is some info that you might consider looking into okay.
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Old 06-14-2010, 11:59 AM
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Re: Bad knock sensor

Thanks
I know that, that's why I need info about clearing the error.
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Old 06-14-2010, 04:04 PM
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Re: Bad knock sensor

dude try switchin ur fuel to premium. that could be part of the problem. h22s are meant to run on premium unleaded.
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Old 06-14-2010, 04:15 PM
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Re: Bad knock sensor

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I am driving with super unleaded fuel only (100RON).
I am driving with the best that our local station offers.
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Old 06-15-2010, 10:52 AM
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Re: Bad knock sensor

New problem for me.

Today the car start to burn oil @!$!@#!@#!@ the "gray lady " start to come out from my exhaust .
Too many problems after the SWAP. I am so angry at this car ... I may trow her from a bridge @#$@$@ car !

H23A2 very very very ... very very stronger than H22A !!! Just because of this Vtec , now I have so much problems with the car @#% grrrrrrrrrrrrrrr !
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Old 06-15-2010, 10:54 AM
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Re: Bad knock sensor

Quote:
H23A2 very very very ... very very stronger than H22A !!!
Uhh, no.

Since you don't want it any more, can I have your motor and your headlights? lol
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Old 06-15-2010, 01:01 PM
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Re: Bad knock sensor

Hahah man I am from Bulgaria , the shipping will be priceless .

So now I went for a little ride and the gray lady was gone ! WTF ?! How can this be ?

P.S This bit** just plays with me
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Old 09-07-2010, 06:45 PM
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Re: Bad knock sensor

CHANGE THE ECU! it will solve all your problems.
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Old 09-08-2010, 04:13 PM
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Re: Bad knock sensor

either get a p28 p72 or buy a damn knock sensor its the only way to fix it
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Old 09-09-2010, 10:07 AM
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Re: Bad knock sensor

Im having the same problem with my 93 h22a1, its like hesitating until bout 4k then starts going ok. This should be a knock sensor? I have no cel on. Will diconnecting it hurt anything?
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Old 09-09-2010, 10:43 AM
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Re: Bad knock sensor

It could be a lot of things. Instead of threadjacking, why don't you make YOUR OWN thread. I bet you will get a lot more help.
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Old 09-09-2010, 05:14 PM
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Re: Bad knock sensor

hi there,. how are u!!

the best way is change p13 ecu with p28 ecu,.since u don't want to buy a new knock sensor..im from malaysia ..2nd hand knock sensor here is around 22 dollar..
because p28 is hard to find here..

but better using knock sensor because it will auto retarded timing if knocking is detect..
and one more thing,.if u change ur mind to buy a knock sensor,please buy b20z usdm long intake manifold knock sensor..hard to crack than h22a knock sensor..
im using b20z knock sensor from 2003..no problem until now..
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Old 05-29-2012, 11:59 AM
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Re: Bad knock sensor

Not to steal this thread but im having the same problem and would i be able to switch to a p2p ecu instead of a p28? Jw
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Old 05-29-2012, 12:17 PM
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Re: Bad knock sensor

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Originally Posted by kritikallyrics View Post
Not to steal this thread but im having the same problem and would i be able to switch to a p2p ecu instead of a p28? Jw

Hi, this thread is like 2+ years old, but Ill still try to help..
I have had 4 preludes .. (and still have one)

I know this sounds crazy, but check your distributor. see if it is leaking from where it goes into the motor.
If that is leaking, replace the seal , and if your valve cover is also leaking, replace the seal ($25).
The knocksensor is in a really bad spot. If you do have to replace it, it is under the intake about halfway in the middle. be careful when removing, easily broken.

but to address your questions .. P2P .. it should be P5P first of all..

that is the 5th gen ecu. and no, it wont eliminate the knock sensor.
the p28 will, (from the 'tegra) because it didnt have a knock sensor.
the P5P is the stock 5th gen prelude ecu, and it wont fit a 92-96 OBD1 prelude harness w/o an adapter.

You are better off getting the knock sensor.. I paid $180 for mine when I needed one back in the day. You can find them online .. cheaper ..


Genuine Honda Acura Knock Sensor KS66 B16 B18 Vtec Type R Civic Integra Prelude | eBay

$20 for a genunine honda knock sensor

Honda Acura Knock Sensor - Brand New with Warranty | eBay
$10 for a replacement one

HONDA CIVIC SI DEL SOL INTEGRA PRELUDE RL KNOCK SENSOR | eBay
$30 for another one

My best advise is get one of these, prefferably the genuine one, or a new one for $10/$30 and try to put it in, reset the CEL and then go for a cruise.

If you cant hit vtec, after installing one of these, it could be something else..

like the VTEC solonoid ... and those are also expensive.. but skunk2 has them for $140.

Let me know if this helps.

-Brian
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Old 05-29-2012, 12:43 PM
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Re: Bad knock sensor

Well it was from a 97 civic ex. But i was told p2p is basically same as the p28 ecu which im guessig wasnt too true lmao
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Old 09-03-2015, 05:57 AM
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Re: Bad knock sensor

Hi can I run a 97-01 knock sensor on 96 h22a1? Thx
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