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 Code 5 KLDE and misfire 
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Joined: June 29 2003, 2:01 AM
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Location: austin, texas
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Post Code 5 KLDE and misfire
Can't seem to shake this code. It was coming on in the morning. After about 10 mins of driving the light would go off and stay off until the car cooled down. Now the light comes on and stays on. Ive checked the obvious things like the connector and for any broken wires. I cant seem to find a flow chart/troubleshooter for code 5... Any help?

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1993 Mazda Mx-3 GS-Sold :(
1992 GS "The Bucket" Gone.
1993 GS 2.5 KLDE. Current daily.

92 GS 5spd for sale! Sold it....after I got a hatch cover in great condition :evil:
92 GS Auction Car, most expensive non-running mx-3 I have ever bought... Parted out and Crushed.

MY WORKLOG, check it out :) http://mx-3.com/phpBB3/viewtopic.php?f=46&t=79959


December 24 2012, 6:45 PM
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Location: CFB Val-Cartier, Quebec, Canada
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Post Re: Code 5 KLDE and misfire
Code 5 should be knock sensor

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1992 Mazda Mx-3 GSR - 2.5L KLZE : Award Winning Show Car & Race Car ['02-'09] (Retired)
2004 Mazda RX-8 GT - Renesis Wankel : LS3 Coils, BHR Mid-Pipe + Falken RT-615K 245/40r18
2011 Mazda Mazda2 GS - 1.5L Manual : Yozora Edition (1 of 500)
2003 Nissan Xterra SE - 4x4 Supercharged : 2" Body Lift, 4" Suspension Lift & 33" MTR Kevlar
2001 Nissan Frontier SE - The Frontrailer : Expedition/Off-Road Trailer Project


December 24 2012, 6:58 PM
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Post Re: Code 5 KLDE and misfire
Nd4SpdSe wrote:
Code 5 should be knock sensor


I know this. But I don't want to pull the intake if I don't have to. I am leaning toward the misfire being related to the code..but i dont know what i need to do to test it.

_________________
1993 Mazda Mx-3 GS-Sold :(
1992 GS "The Bucket" Gone.
1993 GS 2.5 KLDE. Current daily.

92 GS 5spd for sale! Sold it....after I got a hatch cover in great condition :evil:
92 GS Auction Car, most expensive non-running mx-3 I have ever bought... Parted out and Crushed.

MY WORKLOG, check it out :) http://mx-3.com/phpBB3/viewtopic.php?f=46&t=79959


December 24 2012, 7:01 PM
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Post Re: Code 5 KLDE and misfire
Don't have to. The connector for the KS is on the left side of the engine. I can't find the specs at the moment (it is xmas eve after all) but searching I found people say it's either around 330 or 560ohms. Ironically the Xterra is also 560, if you split the min and max difference, which apparently changes with temperature, so don't be surprised if it's a bit different, but check the online manual for the true specs.

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1992 Mazda Mx-3 GSR - 2.5L KLZE : Award Winning Show Car & Race Car ['02-'09] (Retired)
2004 Mazda RX-8 GT - Renesis Wankel : LS3 Coils, BHR Mid-Pipe + Falken RT-615K 245/40r18
2011 Mazda Mazda2 GS - 1.5L Manual : Yozora Edition (1 of 500)
2003 Nissan Xterra SE - 4x4 Supercharged : 2" Body Lift, 4" Suspension Lift & 33" MTR Kevlar
2001 Nissan Frontier SE - The Frontrailer : Expedition/Off-Road Trailer Project


December 24 2012, 7:51 PM
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Post Re: Code 5 KLDE and misfire
Check resistance and continuity on the knock sensor this morning and got no reading. Sound plausible? Are the knock sensors a common problem? I see some posts made but the search function is so hit or miss.... $146 for a new knock sensor....

_________________
1993 Mazda Mx-3 GS-Sold :(
1992 GS "The Bucket" Gone.
1993 GS 2.5 KLDE. Current daily.

92 GS 5spd for sale! Sold it....after I got a hatch cover in great condition :evil:
92 GS Auction Car, most expensive non-running mx-3 I have ever bought... Parted out and Crushed.

MY WORKLOG, check it out :) http://mx-3.com/phpBB3/viewtopic.php?f=46&t=79959


December 26 2012, 4:19 PM
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Post Re: Code 5 KLDE and misfire
Got rid of the misfire. One of my wires was arcing. Ordered new NGK wires on the 5th from a member here. But the code is still present. I hate CEL's. :welder: :welder:

_________________
1993 Mazda Mx-3 GS-Sold :(
1992 GS "The Bucket" Gone.
1993 GS 2.5 KLDE. Current daily.

92 GS 5spd for sale! Sold it....after I got a hatch cover in great condition :evil:
92 GS Auction Car, most expensive non-running mx-3 I have ever bought... Parted out and Crushed.

MY WORKLOG, check it out :) http://mx-3.com/phpBB3/viewtopic.php?f=46&t=79959


December 27 2012, 12:59 PM
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Post Re: Code 5 KLDE and misfire
Code is still present because you didn't fix the knock sensor issue, just the misfire, which is unrelated to a bad/non-existant knock sensor.

You can took up a knock sensor externally or use a resistor to trick it. Those are 2 options that the Xterra/Frontier guys do because the KS is burried and with shop time it's over a grand in labour to replace it and they are prone to failure.

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1992 Mazda Mx-3 GSR - 2.5L KLZE : Award Winning Show Car & Race Car ['02-'09] (Retired)
2004 Mazda RX-8 GT - Renesis Wankel : LS3 Coils, BHR Mid-Pipe + Falken RT-615K 245/40r18
2011 Mazda Mazda2 GS - 1.5L Manual : Yozora Edition (1 of 500)
2003 Nissan Xterra SE - 4x4 Supercharged : 2" Body Lift, 4" Suspension Lift & 33" MTR Kevlar
2001 Nissan Frontier SE - The Frontrailer : Expedition/Off-Road Trailer Project


December 27 2012, 1:56 PM
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Post Re: Code 5 KLDE and misfire
[quote="Nd4SpdSe"]Code is still present because you didn't fix the knock sensor issue, just the misfire, which is unrelated to a bad/non-existant knock sensor.

You can took up a knock sensor externally or use a resistor to trick it. Those are 2 options that the Xterra/Frontier guys do because the KS is burried and with shop time it's over a grand in labour to replace it and they are prone to failure.[/quote

Ill try to google search it and see if I can find a resistor trick. I'd rather do that, than buy another $125+ knock sensor. I don't mind doing the work to change out the knock sensor. I do this stuff for a living. I just cant seem to find the info on testing the sensor.

_________________
1993 Mazda Mx-3 GS-Sold :(
1992 GS "The Bucket" Gone.
1993 GS 2.5 KLDE. Current daily.

92 GS 5spd for sale! Sold it....after I got a hatch cover in great condition :evil:
92 GS Auction Car, most expensive non-running mx-3 I have ever bought... Parted out and Crushed.

MY WORKLOG, check it out :) http://mx-3.com/phpBB3/viewtopic.php?f=46&t=79959


December 28 2012, 5:15 PM
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Post Re: Code 5 KLDE and misfire
What's supposed to be normal resistance reading for knock sensor?

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December 29 2015, 7:19 PM
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Post Re: Code 5 KLDE and misfire
I found a reference of someone saying 500-600ohms, but here's a good post on PT. He says 5000ohms

http://forums.probetalk.com/showthread. ... ensor+ohms

_________________
1992 Mazda Mx-3 GSR - 2.5L KLZE : Award Winning Show Car & Race Car ['02-'09] (Retired)
2004 Mazda RX-8 GT - Renesis Wankel : LS3 Coils, BHR Mid-Pipe + Falken RT-615K 245/40r18
2011 Mazda Mazda2 GS - 1.5L Manual : Yozora Edition (1 of 500)
2003 Nissan Xterra SE - 4x4 Supercharged : 2" Body Lift, 4" Suspension Lift & 33" MTR Kevlar
2001 Nissan Frontier SE - The Frontrailer : Expedition/Off-Road Trailer Project


January 19 2016, 2:24 PM
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Post Re: Code 5 KLDE and misfire
Intake is easy to remove. I removed one and torqued to the max when I reinstalled it and the old gaskets worked fine. Don't you have to remove the coolant pipe as well, that might be a pain.

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January 20 2016, 6:30 PM
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Post Re: Code 5 KLDE and misfire
I'm friends with Stoker100. We bypassed the knock sensor on my car with a resistor and I've been reaping the rewards for years.

viewtopic.php?f=15&t=79912&p=626263&hilit=knock+sensor+resistor#p626263

And yes removing the IM and all that coolant piping for a bulls--- knock sensor is bulls---. These engines don't knock and I've advanced my timing map quite a lot too without issue.

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March 23 2016, 6:49 AM
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