I have been having a rough idle for the past few days. And a strange problem. When I turn my headlights on. My rpms drop a good 50.

So, my normal idle aorund 820, I drop down into the 780s and the engine begins to stumble.

I tried play with the idle bypass and the tps sensor. non seem to help.

I changed spark plugs and that help a little bit. some of the idle went away.

anyway have any clues?

Right now I have to run at 880rpms with the lights off, so when they are on my idle around 820.

 

I think I found the problem.

pin hole in vacuum line.

 

i wonder how you got that...

It is a new car...

conspiracy...
eek!

 

Its not new.

Its got 32k miles on.

Been through several mods. 1 auto-manual swap and various over driveline/engine enhancements smile.gif

 

oh, my god, shadohh had to come to the board because he had a problem? wow, i don't see pigs flying, so what's up?