I recently had a 96 engine (40k)put in my 95 and my car was running great for 3 weeks. Then one day iw as on the highwway and i couldnt pass 40 mph it would spudder and such. I replaced my plugs for the hell of it. Was working great for another week. Now The problem has turned into much worse hard starts + bad vibration @ idle. I recently got 0302. The question i wanted to ask is would 0302 a clogged egr valve tube would that make my car not start and run poorly from acceleration? Would it also give me a bad vibration at idle ? The rpms when i come to a stop drops to 500 or below. So basically what i want to know is what are the effects of a bad egr valve. Ive searched threads but some people saya ll thiese different things. So if anyone knows please let me know, thanks.