Boost Leak?????

[ericherm1]

Hey all, I have a mild problem and was wondering if you all could help me out with diagnosing it.

It seems like I have a boost leak somewhere due to bucking at full throttle and high boost.

I have gone around and retightened all the hose clamps and that seemed to help alittle but it still does it specially when its cold outside.It backfires alittle everytime it bucks with puffs of black smoke(fuel) out the rear.

I turned down the boost controller from 1 bar to .5 and it doesn't do it any more.

When my car is in the on position the boost controller valve under the hood clicks repeatedly alot (Greddy Profec A).

I'm wondering if my boost controller is going bad or my waistgate (stock) is going bad?

Or do I have fuel problems such as injector pulse, still running stock 370cc's but 250lbm warlbo fuel pump along with a Z32 MAF.

Thanks guys in advance.