Join Date: Nov 2013
Location: Vancouver island
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Stock underboost tuned over boost issue
So I have this 05 F350 169xxx KMs I got almost two years ago. Within the first month of buying used at like 130xxx I had the egr failure with the coolant flowing through the turbo and what not. Got fixed at a ford dealership.. Since then it's ran great for a year so I decided to do a few preventative measures and upgrades. egr delete, coolant filter, 4in turbo down to 5in MBRP dual exhaust and a sct 5015 with tunes by innovative diesel. So the problem I have is on the extreme street tune I have I'm over boosting to about 32.5 PSI which stock before any upgrades I only got 28.5. after the upgrades and now when I'm on stock or on the economy tune I only get 20 PSI but sometimes it'll shoot up to 26 with the sct monitor reads as the high but I haven't seen it on the stock gauge also scanned for DTCs and nothing out of the usual egr no flow and voltage for it being unplugged..any help would be greatly appreciated also if you need more info I'll try to answer to the best of my abilities :p
The back pressure says 60 at idle and 170 at WOT replaced the sensor and didn't change anything. Cleaned the sensor tube.
Last edited by Cartermackay; 02-09-2014 at 11:06 PM.