London Low Emission Zone - Feasiblility Study

the passing limit is 1500 my cars reading was 2700. I was wondering what could i do to lower it i changed the manifold, cat converter, graduated or did the cars timing, the first reading was 3200 the second reading was 3500 after changing the cat converter, i also took it to the mechanic and he put in some liquid which cleaned out the cars system. which lowered it to 2700 i really need some help all these mechanics have been ripping me off. I have spent almost 500 dollars fixing it i got a 95 accord with a vtech engine. The mechanic said the problem is the hoses are clogged I dont know if to believe him because i have paid so much already and there has not been a real big change. Can someone tell me what i should fix or if anyone knows of someone in connecticut who could help me out. I have seriously almost ran out of money. email me player2a2003@yahoo.com i mean i dont mind paying 300 as long as i pass the test. the only thing wrong is the Nox and i dont know what to fix. If someone knows of anyone who can hook me up just email me. Player2a2003@yahoo.com

The problem is with the exhaust gas recirculation valve. Its either stuck open, stuck closed or the lines going to or from it a plugged. That is the only thing that controls NOX. To replace the valve and clean the lines will probably cost around $300 or a little more.