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civic blues · Apr 23, 2005, 07:47 PM

Please help. I have a problem with the AGC fuse blowing in the panel under the dash. Every time it blows the car shuts off. I have replaced the ignition control module, coil, cap and rotor but it works for a while and then it blows again. Can anyone HELP?

labman · Apr 23, 2005, 08:45 PM

I had the same problem with my old truck for a while. To try to track it down, I added some fuses on different branches of the circuit. Turned out, it was the fuel pump. I think put about 4 of them on my tuck over a few years. Finally rigged a different style, and it has been fine for about 5 years. It is kind of square as opposed to the OEM ones that were round.

civic blues · Apr 26, 2005, 02:20 PM

Thanks for your reply. This is what I have found out so far. When I turn the key to the second (or II position) the ACG fuse blows, even before the engine cranks. I removed the MAIN RELAY ASSY. And the fuse did not blow. I then tested the relay as described in the Hanes manual and the relay is OK. So far this is what I have done any more suggestions?

CroCivic91 · Apr 26, 2005, 02:32 PM

Are other fuses fine?

Main relay gives power to the fuel pump for "initial" fuel pressure before you crank it. Don't know if that helps anything with troubleshooting.

civic blues · Apr 26, 2005, 05:46 PM

Thanks for the response. I just did some more testing, I installed the MAIN RELAY ASSY. And disconected the fuel pump. I turned the key to the II position and the fuse did not blow. I plugged in the fuel pump and the fuse blew. I think the pump is bad. I don't know how the pump works but every time I plug it in the fuse blows. Am I on the right trac or will I just be wasting my $100's if I buy a new pump?

labman · Apr 26, 2005, 08:16 PM

If it is an external fuel pump, you can buy a generic fuel pump for less than $50. Before you buy any, make sure the wire to the pump doesn't have a bare spot somewhere.

CroCivic91 · Apr 26, 2005, 11:44 PM

Well, obviously the fuse blows because of an electrical problem. If your car was fine running on the previous pump, I would guess a problem might be just the wires to/from the pump. I believe the pump is on the gas tank, I will have to check it though when I get home. Will let you know if manual gives any troubleshooting guide.

civic blues · Apr 27, 2005, 07:11 PM

Thanks for all your help. The problem is now fixed. I found out after taking the pump out and pulling it apart from the assy. That the connector had a short in it. I tested the pump first and it spun when I gave it 12v's. I them checked the connector assy. Hooked up some wires to it, gave it 12v's and at the time of touching the battery I noticed that the wire would spark. So I continued to tap the wire on the battery till it stopped sparking. I figure that as I tapped the wire on the battery post it was blowing away the short till there was no more short. I guess it worked because I assembeld the pump assy and installed it and it WORKS!! Thanks again for all your help.

CroCivic91 · Apr 28, 2005, 07:59 AM

Glad we helped! :)