Engine Recently had some work done and wondering about something...

This might sound stupid (im not sure) As I dont know a lot about cars aside from the basics of how to change my oil etc... Anyway! I recently had a rebuilt transmission as well as new plugs and coils put into my 2001 automatic mustang, has been running fantastic for the past month until today and my check engine light popped on. I checked under the hood to see if there was anything unusual when I noticed a wire running to one of my coils that was wired to it that I had never noticed before, not to mention it was completly new. Looks really sketchy the way it is laying across my engine and was wondering what this is for as I had never noticed it before.

trinity_gt said:

Does the car have an aftermarket tach? An RPM window switch of some sort?

Tapping the coil wiring like this is typically done when you want an RPM signal inside the cabin.

Well, not like that. You're right: That looks unbelievably sketchy. Wires just twisted and not soldered? Hmmm. At least solder it but you should find out where the other end of that wire goes to see if it's equally sketchy or worse...

Click to expand...

Nope! Nothing in the cabin that isnt stock aside from a stereo receiver, but as far as rpm gauges or anything like that I have none, Im going to be going down there within the next few days as my car is now driving as if never had anything done to it, Still jumpy like i have bad coils and if i let off the gas after i get into 3rd gear the car jumps and i get a slight bang in the rear end. Wasnt doing this till the engine light came on.