I bought a 1990 Acura Integra and when you turn it on, u need to hold the gas pedal for awhile while the car idles. After awhile you can take ur foot of the pedal and it will stay on. During idle if you accelerate, a lot of white smoke comes from the exhaust, when u drive you can smell exhaust. I have ran at 70mph no problem. I took out the spark plugs and they were really covered with carbon so i cleaned them. What can the possible problem be? Also when you stop at like a stop sign, the car jerks and idles rough, but does not turn off. Please give me possible solutions or check points, I will update question as you give me suggestions. So if we can work, or IM me so we can check and think it out THANKS