Quick highway pull shows suspicious MAP readings in log.
#1
Junior Member
Thread Starter
Join Date: Jun 2016
Location: Novi-ish, Michigan
Posts: 67
Total Cats: 4
Quick highway pull shows suspicious MAP readings in log.
Did a quick 4th gear pull on the highway to check AFRs at boost, but when i checked the log, it shows erratic MAP readings. Im worried this could be a sign of preignition. anyone have experience with this anomaly? fluctuates between 160-170 kpa, as the attached photo suggests.
#2
Moderator
iTrader: (12)
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 20,705
Total Cats: 3,025
The difference between 160 and 170kpa is 1.45 psi. It's probably your wastegate door not holding steady and oscillating as a result of your timing fluctuating so much. Reduce the difference between rows in that area and see if it doesn't settle down.
Thread
Thread Starter
Forum
Replies
Last Post