Help needed

Old 11-02-2013, 02:09 PM
  #1  
holeshotta
Junior Member
APPRENTICE
Thread Starter
 
Join Date: Jun 2003
Location: Gainesville, VA
Posts: 17
Default Help needed

My dragster starting acting very strange today. Would turn on fuel pump (fuse issue) then tach is bouncing all over throughout rpm range from idle on. It's a 582 with msd 7al3 and 16 volt system. Car seems to run fine but I am concerned the ignition is shot. Any thoughts from the group. Thanks Todd
holeshotta is offline  
Old 11-02-2013, 05:50 PM
  #2  
Swiley383
Senior Member
RACING JUNKIE
 
Swiley383's Avatar
 
Join Date: Apr 2010
Location: White Bluff TN
Posts: 623
Default

Check your grounds first that is always my first suspect I have seen them cause strange things.i would also check the tac
Swiley383 is offline  
Old 11-02-2013, 09:31 PM
  #3  
TheYellaBrick
Senior Member
RACING JUNKIE
 
TheYellaBrick's Avatar
 
Join Date: Mar 2008
Location: Emmett, Idaho
Posts: 7,334
Default

Not only the grounding POINTS but also for a broken wire will 'make and break' with engine vibration.
TheYellaBrick is offline  
Old 11-02-2013, 10:23 PM
  #4  
gearhead1011
Senior Member
EXPERT BUILDER
 
gearhead1011's Avatar
 
Join Date: Jan 2004
Location: Shepherdsville, KY
Posts: 313
Default

X2 on the grounds and don't count on the chassis for a ground. Run a wire from the battery to the MSD and one from the battery to the heads. You also should have a dedicated wire from the positive battery terminal to the MSD 12V. If it's not wired like that change it even if it has been like that since the car was built.
gearhead1011 is offline  
Old 11-03-2013, 06:57 AM
  #5  
holeshotta
Junior Member
APPRENTICE
Thread Starter
 
Join Date: Jun 2003
Location: Gainesville, VA
Posts: 17
Default

Thx all. Tearing all down and looking today
holeshotta is offline  

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


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service