I did a mini me swap and have yet to install a knock sensor. I read somewhere that not having a knock sensor will advance your ignition timing. Is this true?


Modified by mattsthru at 6:53 PM 7/30/2007

 

retard

it won't advance,that would make the detonation worse..

what ecu do you have?

 

No, the ECU will throw a CEL. It will not advance timing.

If the knock sensor was installed and it detected sound waves normally caused by detonation it would then retard your timing, but since it's not there it will just throw a CEL.

 

if you dont have a knock sensor but do have a stock ecu that requires one isnt there a way you could fool the ecu? example put 12 volts to or ground the knock sensor wires to the ecu. what type of signal is the ecu searching for from the knock sensor to see normal operation?

search does not seem to be working for me right now....sorry

 

This particular sensor would be hard to fool the ECU with. It can be done but you'd need to make a power supply (voltage generator is what a knock sensor is by using a peizo electric transducer) and find the sweet spot.

However, there is an easier way obviously. You can use ANY Honda knock sensor that will thread in your hole on the block. On my OBDII B18C swap, I ended up using an Element K24 knock sensor. Just had to use the correct plug for that sensor. Put it in and no more engine light. I have probably driven 1000 miles since I put the sensor in; the light used to come on every time I drove the car.

Also, using a P28 ECU will eliminate the need for a KS..

Ryan

 

Actually the general concensus is that the D16Y8 ECU is an oddball that ADVANCES the timing if it DOES NOT sense any knocking, rather than retard it if it does sense knock.

But you only use a knock sensor if it came on the motor that ecu came with. If it had one and you don't use it, it throws a code. If it didn't use a KS, you'll have no input for the KS anyways.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RyanA &raquo;</TD></TR><TR><TD CLASS="quote">This particular sensor would be hard to fool the ECU with. It can be done but you'd need to make a power supply (voltage generator is what a knock sensor is by using a peizo electric transducer) and find the sweet spot.

However, there is an easier way obviously. You can use ANY Honda knock sensor that will thread in your hole on the block. On my OBDII B18C swap, I ended up using an Element K24 knock sensor. Just had to use the correct plug for that sensor. Put it in and no more engine light. I have probably driven 1000 miles since I put the sensor in; the light used to come on every time I drove the car.

Also, using a P28 ECU will eliminate the need for a KS..

interesting. thanks good info

Ryan</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HiProfile &raquo;</TD></TR><TR><TD CLASS="quote">Actually the general concensus is that the D16Y8 ECU is an oddball that ADVANCES the timing if it DOES NOT sense any knocking, rather than retard it if it does sense knock.</TD></TR></TABLE>

Thats what I was worried about. Would it be enough to cause a p1399 random misfire?

And I have a p2p by the way.

 

c'mon all you mini me people!!!

 

IF it worries you then why not just get a knock sensor and put it in?? Problem solved.....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RyanA &raquo;</TD></TR><TR><TD CLASS="quote">IF it worries you then why not just get a knock sensor and put it in?? Problem solved.....</TD></TR></TABLE>

Probably because if he doesn't HAVE to then he isn't going to.

 

Well, it's pretty much general knowledge that you don't want to advance the heck out of your timing. Just like cranking your distributor all the way advanced... This would be like doing a blanket add on the timing table. You do not do that when you add timing to a timing table.

Also, to see if it's advancing the timing, why not just take an adjustable timing light and see where the timing is? If it's advanced past a stock Y8 then I guess you have advanced timing. If it's stock, guess what?

Also, P1399 is Wait To Start lamp failure. It's used by Chrysler and Jeep only. This is not a valid code on Honda/Acura. Did you mean P0139 O2 Sensor Circuit Slow Response (Bank 1 Sensor 2)? Also, Random Misfire code on OBDII is a universal code number, P0300. Then, specific cylinder misfire codes just add the cylinder number in place of the last 0. IE: P0301 would be misfire, cylinder 1.

 

P1399(vehicle specific)Select manufacterer;honda;random misfire. Anyways I got rid of the code it was because timing was off by a tooth. I'm looking for a cheap knock sensor on ebay and craigslist cause money's low also looking for some odd and ends for my manual conversion but ek parts (used) are scarse around here. I need an adjustable cam gear because the belt goes off on either side and the marks barely make it within specks possibly in and out of range. But thanks for the input. Peace.

 

This is my first comment so it must be important. I found out there are 2 knock sensors that fit my 2006 crv. The cheap/aftermarket sensor says it works with both part numbers- 30530-PNA-003 and 30530–ppl-A01 but the A01 DOES NOT produce enough voltage(epically in 2000 to 3000 rpm range)to satisfy the Brain. People say only buy Honda parts for the quality but also they sell both parts not 1 universal for both. I believe half these comments are due to this once wiring is checked. Thanks Neil