95 Deville runs rough with a/c on
 

Hi Everyone,

I new here please be easy on me. My car runs rough and stalls a lower RPMs and if its cold out it starts hard. I accidently blow the A/C fuse when I was working on something else and the car ran realy good then including gaining about 50 miles on a tank of gas. replaced the fuse and milage droped back down and car ran bad again. Today we hit 90 here and needed to have A/C.

I checked the codes had a bunch

P012 History
P013 History
P030 History
P039 History
P040 Current
P052 History
I039 Current
I052 History
I cleared all codes and drove about 5 miles and the only one to return was I039

Thank you for your time and expert wisdom
George

RE: 95 Deville runs rough with a/c on
 

Welcome George, well the majority of the codes you posted are ignition & emissions. Except the 52 code which is anidle speed control. The 039 code is ignition misfire. So you probably have an electrical demon roaming around at the moment.

RE: 95 Deville runs rough with a/c on
 

Hi Big five double zero,

Thank you for your help, The only eletrical thingy that I notice is my rader detector goes off at will, I thinking its picking up noise(feedback) from something but cannot figure from what. everytime something with a big electrical load happens it goes off such as the trunk pull down motor or a big accelation on the gas.

George