whats up guys. i was curious if anyone else running Punch it tunes are having an issue with some boost surging at low rpm driving. Every morning i start the truck and let it run for a minute or two. leaving my house there is a small hill that i go up and the truck boosts from 10 to 20 psi and then holds back at 10psi till the next gear. Seems like it goes along with the gearing and lock up. it will do this thru 3rd and seems to hold in third. Im running it at level 3 v8 PIP tunes. No limit intake and block offs. Also running the HS low pressure pump. Ill try and get a video tomorrow morning. Let me know if u have any ideas.
cold start boost surge?
- Thread starter brock1129
- Start date
20156point7
Member
Yea mine does it on lvl 4 v8, if you get on it while it's surging the boost will spike to 42 psi which I'm not really crazy about. The lvl 1 and 2 v8 doesn't surge at all.
BIG JUICE
Member
The tuning keeps it from shifting when cold. Prob doing same with boost
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