03 Audi 1.8t

Never n Had an audi. But if itdid not do this before. Check plug gap. Dont believe man. Claim that theycome pre gaped. D If u only replaced 1 inject. Make sur elec conection is good. Inj plug can be loose and will cause all kinds of probs check all. Next start car colf let idle fo r a couple min. Turn off pull plug(s) 1 at a time see if any Re wet with un buned gas if so cecck that plug and wire. If u have 1 that is dry compated to others check that inj. Are u sure u got right plug and inject. Also Do Not use any kind of siliconr based pprod in Any part of fuel system it will clog inj. Ad cause probs. Gas will partly cdisolve and silic. Will clog up injectors. Do u have check enj light on. If so take to parts store amd get it read. Last i had a similar problem on my 97 lincoln drove me nuts i finally broke down and took it to a repair shpop that i had very gpod recomendations to. 1 of the mech even though he was very busy and i was a new cust came out looked at car in about 30 sev. He found prob. The wiring harness plug goong to eltronic foring module was bad. Had himm fix. Cost 100 for parts and labor. Since then these guys have helped me out many times. Its always good to have a shop u can trust wjen u need them. Good luck hope i helped out. T.