Pontiac Street Performance
Home | Profile | Register | Active Topics | Members | Search | FAQ
Username:
Password:
Save Password

 All Forums
 Pontiac Performance
 Ignition Tech
 street fighter cdi
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

RickB
Buffalo

USA
62 Posts

Posted - 26 May 2014 :  3:41:56 PM  Show Profile  Reply with Quote
I installed my cd box today, I carefully checked all connections and started it up. It runs very rough and I can I can hear backfiring in the exhaust. I did not remove the Distributor and I double checked firing order. Any with a cd box experience this or have any suggestions before I remove it?

Bill Boyle
Horse Feathers (Charter Member)

USA
4797 Posts

Posted - 27 May 2014 :  07:00:48 AM  Show Profile  Visit Bill Boyle's Homepage  Reply with Quote
Just for clarification, whose box are you trying? Do you mean MSD's Street Fire?

"Dedicated to keeping the classic Pontiac engine alive."

----
400 bored +.030, forged TRW pistons, ported 62 heads, Hedman headers, 2.5 SS dual exhaust X Pypes, Comp 276AH10 cam, Scorpion 1.65 RR, 850 Q-jet, stock intake & tuned HEI; original owner.

Edited by - Bill Boyle on 27 May 2014 07:02:24 AM
Go to Top of Page

Jack_77GP
Tribal Scout

USA
28 Posts

Posted - 27 May 2014 :  1:56:04 PM  Show Profile  Reply with Quote
I haven't run a CD box before, but in general, backfiring through the exhaust would point to running rich or retarded timing (unburnt fuel igniting in the exhaust system, or charge still burning on its way out of the cylinder). Maybe with the longer spark duration of the msd system you'll have to advance initial timing a bit.

Also, make double sure your distributor hold down is tight. When I first got my car the gasket under the distributor was missing, and it seemed like I couldn't get the bolt tight enough to keep things from moving around, a new gasket fixed that.

77 Grand Prix LJ, 400, T-tops.

Edited by - Jack_77GP on 27 May 2014 1:57:55 PM
Go to Top of Page

RickB
Buffalo

USA
62 Posts

Posted - 27 May 2014 :  3:47:43 PM  Show Profile  Reply with Quote
Msd street fighter CDI
Go to Top of Page

bnorris_74
Crazy Horse

USA
1442 Posts

Posted - 06 Jul 2014 :  07:16:59 AM  Show Profile  Reply with Quote
TTT
Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
Pontiac Street Performance © 2006-2017 Go To Top Of Page
This page was generated in 0.11 seconds. This Site Sponsored By:
Powered By: Snitz Forums 2000 Version 3.4.05