Complete 89 mustang ignition wiring diagram - Sounds just like the ignition manipulate module is getting warm and shutting down. Whilst it quits, spray some starting fluid down the throttle frame. It ought to run a few seconds on the starting fluid. If no longer, you have no spark and the module is the top suspect. Hth. -Jim. My boyfriend has an 89 mustang with a high-quality charger in it. It runs first-rate with the hood up but about five to 10 minutes with the hood down it completely turns off like you shut the key off. The gas pump is still operating to start the auto and the whole lot. If he is taking the hood off the automobile it'll stay going for walks no trouble it's miles simplest turning off like this when the hood is closed. He concept it was vapor locking so he rewired the fuel line that become sitting proper subsequent to the rapid.. That did not help. Wherein is the relay positioned? I checked out a couple different sites and it says underneath the drivers seat however there is nothing there. That is what he initially thought became occurring so then he rewired the gas line and it didn't assist. It's decently modified. Pretty a great deal the whole lot under the hood is after market. It is alleged to get nearly 400 hp. We cannot get it to that point as it doesn't live strolling long enough to have fun with it. He is also a mechanic but this one appears to be stumping him.
Because it takes a few minutes for it to give up (i simply reread your publish) i am nevertheless questioning something is getting warm and closing down. Have you tried spraying beginning fluid down the throttle frame when it quits? That'll slender it down to a gas or ignition trouble. If it's going to run at the beginning fluid it's a gas problem. If not, it is an ignition trouble. Hth. -Jim. Thats an smooth repair and it'd be a good time to improve to a more powerful fuel pump. Dont neglect to alternate gas filter and perhaps the injectors relying on what the set up is.