1996 993 idle issue

[Jer944]

i was wondering if anyone could help, i have a 993 at my shop that had the headlamps stole out of it, the way they did it was they fired the electrical by removing the rear lights and shorting the socket out. well as soon as insurance took care of what they take care of we went to drive the car and it ran into alot of problems with not holding an idle and is also puffing alot of smoke. at first we had assumed it was because of fuel in the oil, it had been moved back and forth over about 30 yards every morning and everynight at the shop, so we did the oil change and nothing got better, so if anyone has run into a similar problem or knows someone who has the help would be great