Home » Public Forums » GMCnet » [GMCnet] Howell EFI - Knock Sensor
| [GMCnet] Howell EFI - Knock Sensor [message #281725] |
Wed, 08 July 2015 21:03  |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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I’m in the final stretch of the Howell installation. All that is left is to install the knock sensor, the computer controlled distributor, and the air cleaner. The knock sensor is making me crazy. Where does that beggar go? I anticipated installing it on the back of the passenger side head, but those threads are too small for the sensor. The threads are 3/8 - 16 and the sensor is 1/2 - pipe thread (I think).
I was certain I read somebody’s installation where they put the knock sensor on the back of the head, but it must have been a different sensor.
Any help?
Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, CA
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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| Re: [GMCnet] Howell EFI - Knock Sensor [message #281729 is a reply to message #281725] |
Wed, 08 July 2015 21:42  |
rvanwin
Messages: 325
Registered: April 2007
Location: Battlefield, MO
Karma: 6
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Senior Member |
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ljdavick wrote on Wed, 08 July 2015 21:03I'm in the final stretch of the Howell installation. All that is left is to install the knock sensor, the computer controlled distributor, and the air cleaner. The knock sensor is making me crazy. Where does that beggar go? I anticipated installing it on the back of the passenger side head, but those threads are too small for the sensor. The threads are 3/8 - 16 and the sensor is 1/2 - pipe thread (I think).
I was certain I read somebody's installation where they put the knock sensor on the back of the head, but it must have been a different sensor.
Any help?
I would suggest starting with it in the water jacket. There is a plug on the lower right of the engine - just above the half axle. If you have a cold engine and are quick, you can remove the plug and put the KS in without losing too much coolant. Others have felt that this location is too sensitive and have put the KS in the front motor mount. I believe they drill and tap for it - I've never done that so others will have to comment.
There was some discussion of this on the EFI Forum: https://groups.google.com/forum/#!topic/gmcmh-efi/4LtNcEVt3QM
Randy & Margie
'77 Eleganza II '403'
Battlefield, MO
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| Re: [GMCnet] Howell EFI - Knock Sensor [message #281732 is a reply to message #281729] |
Wed, 08 July 2015 22:06 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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Read here
http://www.gmcmhphotos.com/photos/knock-sensor/p17094.html
On Wednesday, July 8, 2015, Randy Van Winkle wrote:
> ljdavick wrote on Wed, 08 July 2015 21:03
>> I'm in the final stretch of the Howell installation. All that is left
> is to install the knock sensor, the computer controlled distributor, and
>> the air cleaner. The knock sensor is making me crazy. Where does that
> beggar go? I anticipated installing it on the back of the passenger side
>> head, but those threads are too small for the sensor. The threads are
> 3/8 - 16 and the sensor is 1/2 - pipe thread (I think).
>>
>> I was certain I read somebody's installation where they put the knock
> sensor on the back of the head, but it must have been a different sensor.
>>
>> Any help?
>
> I would suggest starting with it in the water jacket. There is a plug on
> the lower right of the engine - just above the half axle. If you have a
> cold
> engine and are quick, you can remove the plug and put the KS in without
> losing too much coolant. Others have felt that this location is too
> sensitive
> and have put the KS in the front motor mount. I believe they drill and
> tap for it - I've never done that so others will have to comment.
>
> There was some discussion of this on the EFI Forum:
> https://groups.google.com/forum/#!topic/gmcmh-efi/4LtNcEVt3QM
> --
> Randy & Margie
> '77 Eleganza II '403'
> Battlefield, MO
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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| Re: [GMCnet] Howell EFI - Knock Sensor [message #281733 is a reply to message #281729] |
Wed, 08 July 2015 22:01 |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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Senior Member |
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Randy,
I looked at that bung but it looked too small. Could it be 1/2”? If that’s the case then that’s what I’ll do; drilling and tapping are beyond my pay grade, though I’ve done it once (the return fuel fitting!)
I’ll check out the EFI list too.
Thanks,
Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, CA
> On Jul 8, 2015, at 7:42 PM, Randy Van Winkle wrote:
>
> ljdavick wrote on Wed, 08 July 2015 21:03
>> I'm in the final stretch of the Howell installation. All that is left is to install the knock sensor, the computer controlled distributor, and
>> the air cleaner. The knock sensor is making me crazy. Where does that beggar go? I anticipated installing it on the back of the passenger side
>> head, but those threads are too small for the sensor. The threads are 3/8 - 16 and the sensor is 1/2 - pipe thread (I think).
>>
>> I was certain I read somebody's installation where they put the knock sensor on the back of the head, but it must have been a different sensor.
>>
>> Any help?
>
> I would suggest starting with it in the water jacket. There is a plug on the lower right of the engine - just above the half axle. If you have a cold
> engine and are quick, you can remove the plug and put the KS in without losing too much coolant. Others have felt that this location is too sensitive
> and have put the KS in the front motor mount. I believe they drill and tap for it - I've never done that so others will have to comment.
>
> There was some discussion of this on the EFI Forum: https://groups.google.com/forum/#!topic/gmcmh-efi/4LtNcEVt3QM
> --
> Randy & Margie
> '77 Eleganza II '403'
> Battlefield, MO
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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| Re: [GMCnet] Howell EFI - Knock Sensor [message #281735 is a reply to message #281732] |
Wed, 08 July 2015 22:58 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Senior Member |
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Mine went in where Randy's did. The hole is bigger than it looks with the
plug in.
Sully
77 royale
77 eleganza 2
Seattle
On Wednesday, July 8, 2015, gene Fisher wrote:
> Read here
> http://www.gmcmhphotos.com/photos/knock-sensor/p17094.html
>
>
> On Wednesday, July 8, 2015, Randy Van Winkle > wrote:
>
>> ljdavick wrote on Wed, 08 July 2015 21:03
>>> I'm in the final stretch of the Howell installation. All that is left
>> is to install the knock sensor, the computer controlled distributor, and
>>> the air cleaner. The knock sensor is making me crazy. Where does that
>> beggar go? I anticipated installing it on the back of the passenger side
>>> head, but those threads are too small for the sensor. The threads are
>> 3/8 - 16 and the sensor is 1/2 - pipe thread (I think).
>>>
>>> I was certain I read somebody's installation where they put the knock
>> sensor on the back of the head, but it must have been a different sensor.
>>>
>>> Any help?
>>
>> I would suggest starting with it in the water jacket. There is a plug on
>> the lower right of the engine - just above the half axle. If you have a
>> cold
>> engine and are quick, you can remove the plug and put the KS in without
>> losing too much coolant. Others have felt that this location is too
>> sensitive
>> and have put the KS in the front motor mount. I believe they drill and
>> tap for it - I've never done that so others will have to comment.
>>
>> There was some discussion of this on the EFI Forum:
>> https://groups.google.com/forum/#!topic/gmcmh-efi/4LtNcEVt3QM
>> --
>> Randy & Margie
>> '77 Eleganza II '403'
>> Battlefield, MO
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
>
>
> --
> Gene Fisher -- 74-23,77PB/ore/ca
> “Give a man a fish; you have fed him for today --- give him a URL and
> -------
> http://gmcmotorhome.info/
> Alternator Protection Cable
> http://gmcmotorhome.info/APC.html
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: [GMCnet] Howell EFI - Knock Sensor [message #281736 is a reply to message #281735] |
Wed, 08 July 2015 23:05 |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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Senior Member |
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Thanks.
Larry Davick
> On Jul 8, 2015, at 8:58 PM, Todd Sullivan wrote:
>
> Mine went in where Randy's did. The hole is bigger than it looks with the
> plug in.
>
> Sully
> 77 royale
> 77 eleganza 2
> Seattle
>
>> On Wednesday, July 8, 2015, gene Fisher wrote:
>>
>> Read here
>> http://www.gmcmhphotos.com/photos/knock-sensor/p17094.html
>>
>>
>> On Wednesday, July 8, 2015, Randy Van Winkle > > wrote:
>>
>>> ljdavick wrote on Wed, 08 July 2015 21:03
>>>> I'm in the final stretch of the Howell installation. All that is left
>>> is to install the knock sensor, the computer controlled distributor, and
>>>> the air cleaner. The knock sensor is making me crazy. Where does that
>>> beggar go? I anticipated installing it on the back of the passenger side
>>>> head, but those threads are too small for the sensor. The threads are
>>> 3/8 - 16 and the sensor is 1/2 - pipe thread (I think).
>>>>
>>>> I was certain I read somebody's installation where they put the knock
>>> sensor on the back of the head, but it must have been a different sensor.
>>>>
>>>> Any help?
>>>
>>> I would suggest starting with it in the water jacket. There is a plug on
>>> the lower right of the engine - just above the half axle. If you have a
>>> cold
>>> engine and are quick, you can remove the plug and put the KS in without
>>> losing too much coolant. Others have felt that this location is too
>>> sensitive
>>> and have put the KS in the front motor mount. I believe they drill and
>>> tap for it - I've never done that so others will have to comment.
>>>
>>> There was some discussion of this on the EFI Forum:
>>> https://groups.google.com/forum/#!topic/gmcmh-efi/4LtNcEVt3QM
>>> --
>>> Randy & Margie
>>> '77 Eleganza II '403'
>>> Battlefield, MO
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
>>
>> --
>> Gene Fisher -- 74-23,77PB/ore/ca
>> “Give a man a fish; you have fed him for today --- give him a URL and
>> -------
>> http://gmcmotorhome.info/
>> Alternator Protection Cable
>> http://gmcmotorhome.info/APC.html
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> _______________________________________________
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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| Re: [GMCnet] Howell EFI - Knock Sensor [message #281740 is a reply to message #281732] |
Thu, 09 July 2015 02:50 |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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Senior Member |
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Gene,
Thanks for the 1,000 words equivalent. I get it now!
Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, CA
> On Jul 8, 2015, at 8:06 PM, gene Fisher wrote:
>
> Read here
> http://www.gmcmhphotos.com/photos/knock-sensor/p17094.html
>
>
> On Wednesday, July 8, 2015, Randy Van Winkle wrote:
>
>> ljdavick wrote on Wed, 08 July 2015 21:03
>>> I'm in the final stretch of the Howell installation. All that is left
>> is to install the knock sensor, the computer controlled distributor, and
>>> the air cleaner. The knock sensor is making me crazy. Where does that
>> beggar go? I anticipated installing it on the back of the passenger side
>>> head, but those threads are too small for the sensor. The threads are
>> 3/8 - 16 and the sensor is 1/2 - pipe thread (I think).
>>>
>>> I was certain I read somebody's installation where they put the knock
>> sensor on the back of the head, but it must have been a different sensor.
>>>
>>> Any help?
>>
>> I would suggest starting with it in the water jacket. There is a plug on
>> the lower right of the engine - just above the half axle. If you have a
>> cold
>> engine and are quick, you can remove the plug and put the KS in without
>> losing too much coolant. Others have felt that this location is too
>> sensitive
>> and have put the KS in the front motor mount. I believe they drill and
>> tap for it - I've never done that so others will have to comment.
>>
>> There was some discussion of this on the EFI Forum:
>> https://groups.google.com/forum/#!topic/gmcmh-efi/4LtNcEVt3QM
>> --
>> Randy & Margie
>> '77 Eleganza II '403'
>> Battlefield, MO
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
>
>
> --
> Gene Fisher -- 74-23,77PB/ore/ca
> “Give a man a fish; you have fed him for today --- give him a URL and
> -------
> http://gmcmotorhome.info/
> Alternator Protection Cable
> http://gmcmotorhome.info/APC.html
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
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Unsubscribe or Change List Options:
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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| Re: [GMCnet] Howell EFI - Knock Sensor [message #281741 is a reply to message #281740] |
Thu, 09 July 2015 05:20 |
Steve
Messages: 506
Registered: September 2013
Location: East Greenville, Pa
Karma: 1
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Senior Member |
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Gene,
Yes, thanks for the link. I have been searching for the picture of the dash cover cut out. It is the photo right after the knock sensor. My dash cover will get modified this weekend.
ljdavick wrote on Thu, 09 July 2015 03:50Gene,
Thanks for the 1,000 words equivalent. I get it now!
Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, CA
> On Jul 8, 2015, at 8:06 PM, gene Fisher wrote:
>
> Read here
> http://www.gmcmhphotos.com/photos/knock-sensor/p17094.html
>
>
> On Wednesday, July 8, 2015, Randy Van Winkle wrote:
>
>> ljdavick wrote on Wed, 08 July 2015 21:03
>>> I'm in the final stretch of the Howell installation. All that is left
>> is to install the knock sensor, the computer controlled distributor, and
>>> the air cleaner. The knock sensor is making me crazy. Where does that
>> beggar go? I anticipated installing it on the back of the passenger side
>>> head, but those threads are too small for the sensor. The threads are
>> 3/8 - 16 and the sensor is 1/2 - pipe thread (I think).
>>>
>>> I was certain I read somebody's installation where they put the knock
>> sensor on the back of the head, but it must have been a different sensor.
>>>
>>> Any help?
>>
>> I would suggest starting with it in the water jacket. There is a plug on
>> the lower right of the engine - just above the half axle. If you have a
>> cold
>> engine and are quick, you can remove the plug and put the KS in without
>> losing too much coolant. Others have felt that this location is too
>> sensitive
>> and have put the KS in the front motor mount. I believe they drill and
>> tap for it - I've never done that so others will have to comment.
>>
>> There was some discussion of this on the EFI Forum:
>> https://groups.google.com/forum/#!topic/gmcmh-efi/4LtNcEVt3QM
>> --
>> Randy & Margie
>> '77 Eleganza II '403'
>> Battlefield, MO
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
>
>
> --
> Gene Fisher -- 74-23,77PB/ore/ca
> "Give a man a fish; you have fed him for today --- give him a URL and
> -------
> http://gmcmotorhome.info/
> Alternator Protection Cable
> http://gmcmotorhome.info/APC.html
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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1978 GMC Royal
Eastern Pennslyvania
1968 Chevrolet C20 396 Camper Special
1969 Chevrolet C20 Camper Special
1985 Buick Electra Park Avenue
1992 Camaro 25th Anniversary Heretage Edition Black
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| Re: [GMCnet] Howell EFI - Knock Sensor [message #281747 is a reply to message #281729] |
Thu, 09 July 2015 07:58 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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I also have never done this is but the previous posting is the same recommendation I have heard from others who have. The back of the head is supposedly too noisy, picking up noise from the valve train. The motor mount is supposed to be a much quieter location.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Howell EFI - Knock Sensor [message #281757 is a reply to message #281747] |
Thu, 09 July 2015 10:53 |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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Senior Member |
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Ken,
My preference would be to use the back of the head. It’s easily accessible and within reach of the wiring. However the threads are only 3/8" and the knock sensor (at least the one I have) has 1/2” threads. When I crawled under the coach to install the sensor in the water bung it looked like 3/8” to me, but I’m not certain. That’s were I’ll try to put it today.
Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, CA
> On Jul 9, 2015, at 5:58 AM, Ken Burton wrote:
>
> I also have never done this is but the previous posting is the same recommendation I have heard from others who have. The back of the head is
> supposedly too noisy, picking up noise from the valve train. The motor mount is supposed to be a much quieter location.
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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| Re: [GMCnet] Howell EFI - Knock Sensor [message #281892 is a reply to message #281777] |
Sat, 11 July 2015 19:30 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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MSD was supplying a threaded hex Stand offs for their Knock sensor kit.1/2
to 3/8.
We should have then in stock soon and include them in or EFI EBL kit..
On Thu, Jul 9, 2015 at 2:40 PM, Larry wrote:
> I am using the GM 7730 ECU with software from Dynamic EFI and was plagued
> with excessive knock counts from a knock sensor located in a threaded dead
> end hole on the block...passenger side... of my Cad 500. I ended up
> installing a knock filter in the ECU. If you are using EBL by Dynamic EFI,
> I
> believe that you can get some kind of knock filter that plugs into the ECU
> and filters out the extraneous noise. Don't know if this is available for
> the 7747 ECU, but try contacting BobR for more information on this. JFWIW
>
> --
> Larry
> 78 Royale w/500 Caddy
> Menomonie, WI.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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