i have a sd with the 6 speed manual and i hooked up a cheap boost guage into my map line just to see what kind of numbers im getting and the results were about 3-5 psi cruising and shifting through the gears at around 1500 to 2000 rpm and as high as 10 at 2500 rpm . nothing higher than 10 psi of boost. is the guage inaccurate or are then numbers normal. the truck has 275km (not miles ) on it , has new exhast back pressure sensor and tube and still has 3 codes Po470(exhaust pressure sensor) P0472(ebp circuit low input) and Po478(exhaust pressure control valve high) . are these codes affecting anything. any info would be greatly appreciated thx so much in adavnce.
i'm chasing the same #'s. Unfortunetly, your #'s are low, too. I "was" seeing 16-18psi before my turbo popped. Setting the SES light(22-25psi), with the redline unplugged.
Look into a boost leak detector. Theres threads on how to make one.
ya i figured they were low not sure where to go from there i dont see any leaks on the up pipes but ill have to try and make that tool so i can rule that out forsure . i havent tryed unplugging my red line yet but just dont know where to start or what could cause it ive spend hours and hours on the forumns reading.
Im running the same exact set up and im getting max 10-11 psi when i go to shift. from what i read it makes a difference if you use a mechanical gauge vs. a electronic gauge also
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