Okay, So it’s pretty simple. i have a t25 turbo on my car, fully running and runs good most of the time. when it’s cold, no boost… No problem, normal, when city driving for…20 mikn or so, engine at FOT. i run only about 4 psi, get on the highway drive for about 15 min going about 120 km/h @ 3500 highway FULL BOOST(7psi) get back onto city right after highway and give from…2nd agian full boost, drive in city for about 20 more min and agian only about 4 psi…i have a full stock exhust from the cat back. My only guess is that the cat is plugged. what do you guys think?
Thanks.