Have had installed a head unit. SOmething under dash fried. A red wire melted.

SInce red wire melt performance on car has been bad. Has not been producing boost nearly like it used to.

There is a red wire that seems to stem out and do alot of things, I am wondering if it messed any thing else up. Like mention car was tuned and ran fine before this headunit short out. Some type of electrical malfunction. No codes on car. I want to try figure it out before I go any further.

Next steps are compression test, valve train inspection, valve adjustment. Inspection of rear intake manifold. Maby there is a leak? Maby some loose hardware I cant see causing vaccume issue?

Have checked all hoses and couplers. Not sure if a valve is bent or floated one.

dont build boost like it did before, I thought my waste gate was not working.

 

Bump

 

hmmm maybe you burnt a fuse and its causing you to run in limp mode but im not sure what fuse would cause poor performance. Are you sure your problems happened after the head unit install?

 

MM&Y of car would help.

On Honda/Acura, a red lead at the stock radio harness is the illumination ground lead from the Dash Lights Brightness Controller, [sometimes mistakenly called the dimmer switch] red/black is illumination power.

Without knowing the MM&Y of car I can't be of anymore help other then to say, when one lead burns it almost always damages other wiring running next to it in the harness, and as in all cases of burnt wiring the only "fix" is to, at the very least, pull the harness and open it up and trace the red lead to inspect for damage to other wiring.

Although the "easy" fix is to replace the harness, repairing the existing harness is not that much more work and definatly cheaper. 94