My mk3 wont start please help - Intermittent ignition problems

[1_BAD_MK3]

ok i fixed my car all i needed was a new battery fixed my turbo but now it lags boost when i step on the gas it goes but then it starts to bog and it starts to backfire why

[Krem]

possible o2 sensor or otherwise clogged exhaust system, or possibly your timing (can't remember which type is which, sorry)

[1_BAD_MK3]

i changed my piping so its not that i put 3 inch straight piping no cats

[Green7mgte]

Originally Posted by 1_BAD_MK3

ok i fixed my car all i needed was a new battery fixed my turbo but now it lags boost when i step on the gas it goes but then it starts to bog and it starts to backfire why

glad to hear the problem was at the battery. could of been able to asses that problem if you described what your car was doing in the process (ie. slow crank at start up) instead of (no start) that is most def a batter problem. I guess I coulda offered that as a suggestion to start with but decided to skip the ez things figuring everyone knew what a dead battery sounded like.
to start, what did you do to fix your turbo? What exactly was your tubo doing that required fixing? booste leak + over rich fuel spray can cause turbo bog and backfire I supose. as the post above says "check your timing" and pull the codes to see whats going on.
and like always, don't create multiple threads asking the same questions. your problems won't be solved. its just annoying.

[1_BAD_MK3]

my old turbo was passing oil and my car started to throw smoke and i got a new turbo how do i check for codes