MSD Tech Support Forums

Go Back   MSD Tech Support Forums > MSD Ignition Forums > Trouble-Shooting

Trouble-Shooting Diagnose your ignition

Reply
 
Thread Tools
  #1  
Old 07-24-2006, 06:01 PM
yukon570 yukon570 is offline
Junior Member
 
Join Date: Jul 2006
Posts: 2
Question boost timing master

I had recently purchased a Holley procharger and an msd timing master for my 86 mustang.I had run the car about six times now and it really rocks but the last time I was driving it , it developed a backfire through the carb at low boost (2-3lbs) if you stay out of boost, the car runs great.Im only running 5-7lbs boost w/retard starting at 1lb/2degrees.Car was running great at this setting until this backfire came about.total advance is 36d.Im also running 110 torco fuel to help elliminate detonation.Any suggestion, is something going on with boost controller.
Reply With Quote
  #2  
Old 07-25-2006, 09:53 AM
smokkinjoe smokkinjoe is offline
Junior Member
 
Join Date: Jul 2006
Posts: 3
Default

I would take 2 or 3 degrees more timing away from it once and try it sound more like detonation still to me, at 7 psi I am running 31 degrees of timing with VP C16.

Joe
Reply With Quote
  #3  
Old 07-27-2006, 10:36 AM
msdtechsupport3's Avatar
msdtechsupport3 msdtechsupport3 is offline
Tech Support
 
Join Date: Feb 2006
Location: El Paso, TX
Posts: 3,300
Default

Were there any other changes made just before the problem came up?
__________________
MSD Tech Support
915-855-7123
Reply With Quote
  #4  
Old 08-21-2006, 07:05 AM
yukon570 yukon570 is offline
Junior Member
 
Join Date: Jul 2006
Posts: 2
Default

No. I had recently talked to one of your tech guys and they told me to shield the wire lead from the distributor to the bcm w/tin foil and ground to chasis.I did this and i still have the same problem,it works good at first and then it creeps up on you. I then turnd the control knob to 0 and it dosent backfire anymore but i also dont have timing retard when the knob is set at 0 if im correct here. Any other sugjestions?
Reply With Quote
  #5  
Old 08-30-2006, 08:17 AM
msdtech21's Avatar
msdtech21 msdtech21 is offline
Tech Support
 
Join Date: Mar 2006
Posts: 1,229
Default

How old is this BTM? What do you have the start point set at? How many psi of boost is the motor normally seeing? The knob is not just 1, 2, or 3. It is linear meaning if you give it a half turn into 1 it will give you half a degree of retard. Have you tried setting the starting point a little higher? Let us know.
Reply With Quote
Reply

Bookmarks

Thread Tools

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

Forum Jump


All times are GMT -6. The time now is 12:25 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
2011 MSD Performance