My 87 grand national is driving my up a wall. I'm driving pops a ccci fuse put another one in pops it instantly. I put 10 which is required it blows, I just put in a 25amp fuses car fine stays running what gives. No other circuit connected on that line. It popped fuel,ing fuse once it never popped again.
Car keeps popping ccci fuse
- Thread starter Lturbo6
- Start date
jarredsoon
Member
- Joined
- Aug 9, 2007
You may have a short somewhere. I would check all wires on that circuit connected to that fuse. I had a relay not fully plugged in and my charging/generator fuse kept blowing, causeing my batter volt gauge to be low and eventually a dead battery. I can't recall what the relay was maybe an ac relay but as soon as I snapped it back in the fuse stopped blowing. It would blow instantly when inserted and was very annoying. I had to look in the service manual to see what other circuits were on that fuse.
Good Luck
Good Luck
Never a good idea to put in a bigger fuse let alone one that is over twice as big as the original! You can start a fire that way. The 10 amp fuse is protecting wiring that can only handle 10 amps. Putting in a 25 you could now be drawing 20 amps and heating up wiring or other components and can do severe damage or even start a fire. put the 10 amp BBC back in and find whst is causing the problem.
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I just checked service manual the 10 amp fuse feeds the primary side of the ignition coils. There is probably a problem in the coil pack. I think I read somewhere if the tabs that the wiring connect to in the coil pack are bent the wrong way they can rub through the insulation in the ignition module in short out. I would take the coil pack of and look very closely under it and at the wiring that connects to the ignition module. I can't stress enough not to run with a 25 amp fuse in that circuit.
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greeneyegi
Well-Known Member
- Joined
- Feb 21, 2010
mine was right after replacing a stock type coil also,
after upgrading to a TR6,that is when you put a 20 or 25 A fuse in.
after upgrading to a TR6,that is when you put a 20 or 25 A fuse in.
Team Banana
Well-Known Member
- Joined
- Aug 9, 2008
We upgraded the fuel pump on a GN and it blowed the fuse on the first test drive. I had to put the pump on a separate fuse
Team Banana
Well-Known Member
- Joined
- Aug 9, 2008
Found that out the hard way
That checks the secondary side of the coils. A problem on that side usually causes a misfire under load/boost. It does not cause the fuse to blow. The 10 amp fuse feeds the primary side of the coils-that is where the problem is. To test that side you need to take the coil pack off the ignition module. It could still be a bad module but the wiring to the primary wiring needs to be checked as well.
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