[smelly240]

if its backfiring out the intake - its almost certainly the dist/cas needing someone that knows what they're doing to adjust it.

I'm not sticking up for someone with obviously questionable ethics - but that is something I've dealt with before - when customers or their "friends" set their own timing - they assure me its right and then when i unplug the tps they look at me like im an alien. Its something thats probably a issue since he does mail order stuff.