Can anyone tell me why I keep burning up the #7 spark plug?
09-19-2005, 11:42 AM
#1
On The Tree
Thread Starter
Join Date: Aug 2004
Location: oklahoma
Posts: 193
Likes: 0
Received 0 Likes
on
0 Posts
Can anyone tell me why I keep burning up the #7 spark plug? I've sprayed a 200 shot on my car on just a few occasions (8.8:1 408ci). I haven't been able to tell if the number 7 spark plug is toast after just spraying once, or if it's when I spray back to back. So far I've replaced the plug twice. I've got a racetronix fuel pump and 42lb. injectors, but I do only have the stock fuel rails on my 99frc. Has anyone else heard of this problem? My shop says that they've got another guy w/an SS that's got stock fuel rails and he keeps burning the #7 spark plug. My shop thinks that upgrading the fuel rails will fix the problem and I agree w/them because comparing the stock fuel rail to an aftermarket fuel rail, it definitely seems to make sense. What do you guys think the problem is?Thanks a bunch!--Andy
09-20-2005, 04:00 PM
#3
Also check the spark plug wires for proper separation. The 5/7 combo is the most prone in the SBC for crossfire through induction. Put extra wire separators between these 2 wires so that they are 1/2" apart at all times.
This might help.
If it doesn't, I would also try moving the #7 injector to a different cylinder to see if the problem moves.
When you drive without spray, do you see any difference in the #7 plug?
Jim
This might help.
If it doesn't, I would also try moving the #7 injector to a different cylinder to see if the problem moves.
When you drive without spray, do you see any difference in the #7 plug?
Jim
