How to get rid of Spark knock on a new motor - Ford F150 Forum - Community of Ford Truck Fans



How to get rid of Spark knock on a new motor

Reply
 
 
 
Thread Tools Search this Thread
Old 01-04-2018, 08:27 PM   #1
Junior Member
Thread Starter
 
Join Date: Jan 2018
Location: Clayton Nc
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
Default How to get rid of Spark knock on a new motor

So recently my old ford 302 in my 1990 f150 with who knows how many miles and 5 speed 4x4 died on me and rather than put a junk yard engine i bought a brand new reman from the dealer and from top to bottom its new except for the distributor before the new motor it spark knocked no mater what distributor was put in it same with the new motor it's driving me crazy as to what it could be and I don't want to break another motor due to spark knock any advice on what it could be
I'm starting to think the platinum plugs might be the issue could someone let me know if I'm on the right track thanks

Last edited by Wyatt Bowen; 01-04-2018 at 10:07 PM. Reason: More detail
Wyatt Bowen is offline   Reply With Quote
Old 01-04-2018, 08:55 PM   #2
Senior Member
 
wde3477's Avatar
 
Join Date: Jul 2007
Location: Cape Girardeau MO
Posts: 2,710
Thanks: 0
Thanked 68 Times in 68 Posts
Default

Welcome to the site!

Not a fan of all the specialty plugs offered, suggest to stick with the OEM-type Motorcraft copper-cores, gapped to spec.

Without further info on make, model, year, mods - assuming that all else is stock. Suggest knocking is due to either timing, poor fuel, or combustion chamber buildup. Being a new engine eliminates buildup, leaving timing and fuel quality as leading suspects.

Good luck, and keep us posted.
wde3477 is offline   Reply With Quote
Old 01-04-2018, 08:55 PM   #3
Senior Member
 
justintendo's Avatar
 
Join Date: Jul 2015
Location: western pa
Posts: 277
Thanked 19 Times in 19 Posts
Default

need to check and verify ignition timing
justintendo is offline   Reply With Quote
Old 01-04-2018, 10:05 PM   #4
Junior Member
Thread Starter
 
Join Date: Jan 2018
Location: Clayton Nc
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by wde3477 View Post
Welcome to the site!

Not a fan of all the specialty plugs offered, suggest to stick with the OEM-type Motorcraft copper-cores, gapped to spec.

Without further info on make, model, year, mods - assuming that all else is stock. Suggest knocking is due to either timing, poor fuel, or combustion chamber buildup. Being a new engine eliminates buildup, leaving timing and fuel quality as leading suspects.

Good luck, and keep us posted.
the plugs are motorcraft platinum and timing is dead on I'm probably gonna start with the plugs my next thing it could be is ecm all sensors are either new or tested ok I'm at a loss as what to do next

Last edited by Wyatt Bowen; 01-04-2018 at 10:15 PM.
Wyatt Bowen is offline   Reply With Quote
Old 01-04-2018, 10:08 PM   #5
Junior Member
Thread Starter
 
Join Date: Jan 2018
Location: Clayton Nc
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by justintendo View Post
need to check and verify ignition timing
we have checked and rechecked the timing and the distributor is almost brand new
Wyatt Bowen is offline   Reply With Quote
Old 01-04-2018, 10:12 PM   #6
Junior Member
Thread Starter
 
Join Date: Jan 2018
Location: Clayton Nc
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by Wyatt Bowen View Post
the plugs are motorcraft platinum and timing is dead on
Also on old motor it did same thing no mater which gas I use it's driving me crazy
Wyatt Bowen is offline   Reply With Quote
Old 01-05-2018, 01:01 PM   #7
Senior Member
 
wde3477's Avatar
 
Join Date: Jul 2007
Location: Cape Girardeau MO
Posts: 2,710
Thanks: 0
Thanked 68 Times in 68 Posts
Default

Perhaps verify that the timing controls are doing their thing - that is, make sure the timing advances as RPMs are slowly increased.
wde3477 is offline   Reply With Quote
Old 01-05-2018, 01:46 PM   #8
Junior Member
Thread Starter
 
Join Date: Jan 2018
Location: Clayton Nc
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by wde3477 View Post
Perhaps verify that the timing controls are doing their thing - that is, make sure the timing advances as RPMs are slowly increased.
thanks for the advice if timing doesnt advance or retard what would be the culprit
Wyatt Bowen is offline   Reply With Quote
Old 01-05-2018, 01:53 PM   #9
Senior Member
 
Join Date: Sep 2017
Location: Near Macomb, Illinois
Posts: 251
Thanked 40 Times in 30 Posts
Default

I'm a little vague on how the timing is controlled on your engine. Does it have a computer that controls the timing? Is it controlled by the distributor? If its controlled by the distributor, check inside of it to make sure the springs and weights are working correctly. Without more info I'd say you are getting to much timing advance. You can dial back the intial timing to see if that helps. On an older car I once put a timing tape on it. This lets you see how the advance kicks in as you rev the engine up using a timing light. Somewhere around 30 degrees or a little more should be the max the timing advances. A real lean condition can also cause spark knock. If the timing isn't advancing, I'd say its almost impossible for you to have spark knock unless you have crazy high compression.

Another question, are you sure its spark knock?
dodgeman1 is online now   Reply With Quote
Old 01-05-2018, 02:22 PM   #10
Junior Member
Thread Starter
 
Join Date: Jan 2018
Location: Clayton Nc
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by dodgeman1 View Post
I'm a little vague on how the timing is controlled on your engine. Does it have a computer that controls the timing? Is it controlled by the distributor? If its controlled by the distributor, check inside of it to make sure the springs and weights are working correctly. Without more info I'd say you are getting to much timing advance. You can dial back the intial timing to see if that helps. On an older car I once put a timing tape on it. This lets you see how the advance kicks in as you rev the engine up using a timing light. Somewhere around 30 degrees or a little more should be the max the timing advances. A real lean condition can also cause spark knock. If the timing isn't advancing, I'd say its almost impossible for you to have spark knock unless you have crazy high compression.

Another question, are you sure its spark knock?
it is computer controlled there is a little computer on the side of distributor and I haven't played with time yet it is for sure spark knock I'll check that when I get a chance thanks for the advice
Wyatt Bowen is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
anyway to get rid of key chime?? rocketrn25 2004 - 2008 Ford F150 9 06-21-2015 07:43 PM
07 I have a miss and spark knock I can't get rid of.. need some help!! bigcountry25 2004 - 2008 Ford F150 0 08-20-2014 02:13 AM
How to get rid of the squak caused by the springs? pcart23 1997 - 2003 Ford F150 8 06-16-2010 09:31 PM
2004 f150..how do i delete cats and get rid of 02 sensor??? please help dsmnightrider02 2004 - 2008 Ford F150 4 01-25-2010 10:11 PM
want to get rid of a set of tires? Ty Off-Topic 6 05-08-2007 08:17 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 11:48 PM.


Copyright 2006 - 2017 F150Forum.com We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: