[unicoder]

These people are trying to help, it's considered a little rude to ask a question on here and then just reply with why their suggestions aren't good.

First off, the previous comments:
- Noid light rental is FREE
- Check your TPS because these cars are notorious for needing them adjusted/replaced
- Check your Fuel Pressure. If you "highly doubting" it's an issue is enough not to test something, you got a bad road ahead with the car


Also, Check the little things, they can sneak up on you seriously.


Since you said the ONLY thing that changed was the harness if it were me I would start there to see what was missed. It may be a grounding issue, if you have a wideband watch your AFR at idle as you toggle the accessories/lights/AC/wipers. Does it drop .5-1 point each time you turn one on or off?

If so, or just a good idea in general - Did you remember to ground the harness when hooking it up? Is your engine grounded to chassis? do you have an extra ground strap from the neg battery terminal to the engine?