240zBoy Posted January 5, 2011 Share Posted January 5, 2011 (edited) I have the msd6al ignition and I was experiencing run on problems. I narrowed it down to the fact that the smaller red 12v wire that is suppose to be hot when key is on. That wire I accidentally had going to a constant 12v and thus it wouldn't turn off. Now here is the weird part. While searching my wire harness for a switched wire I found one that went to a metal box with a thick white wire and a blue-red wire and a couple others. The thick blue-red is hot when key is on only. Thus I connected it there and it will not turn on the car. I connect it back to constant 12v and it turns on first try. When I disconnect it from the constant 12v while running it shuts the car off to so I know the run on problem is there. I even voltage tested both wires and they are identical. Any ideas? I am stumped Edited January 5, 2011 by 240zBoy Quote Link to comment Share on other sites More sharing options...
GOTHALOSISM Posted January 5, 2011 Share Posted January 5, 2011 What I did was run the switched wire to a toggle switch in case I need to shut it off real fast. Just grab a toggle switch run a constant 12v wire to it (with fuse)then a ground and then the swiched from the harness. In case of a fire or anything I can just flip it down and it turns off the engine. Quote Link to comment Share on other sites More sharing options...
72240Z Posted January 5, 2011 Share Posted January 5, 2011 Check the wire to see if it is hot in both START and run. This may be your problem. Quote Link to comment Share on other sites More sharing options...
240zBoy Posted January 8, 2011 Author Share Posted January 8, 2011 Well I tried 3 different switched sources and none could do it I just said eff it and hooked up an engine cut off switch. I think my msd box might have got a little messed up when it was hooked to a constant 12v source or something. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.