[MTK24]

I flashed the car on MHD stage 0 then did a jb4 pump flash.

I flashed a few days ago car felt 'normal' but I did no logs.

I re flashed today to remove 3106 downpipe code. The car feels a lot slower than the other 98G0B Pump I flashed. I selected 4/2 on jb4 to start BEF mode. Then set jb4 to MAP 2.

Car drives fine and has no misfire or check engine lights. Aluminum charge pipe connection is tight, so is connection to intercooler. I do not hear any buzzing sounds from my boost solenoid.

I attached some logs.

[Cory S]

JB4 makes more power than MHD, because JB4 allows for a higher timing peak. My car has always been faster on JB4 stand-alone, but fuel trims are more centered with a BEF loaded. Stock timing curve peak is 15.5° BTDC, where as an MHD pump flash is usually 8.5° peak. (Zero knock). You also won’t get throttle closures with JB4.

[MTK24]

Originally Posted by Cory S

JB4 makes more power than MHD, because JB4 allows for a higher timing peak. My car has always been faster on JB4 stand-alone, but fuel trims are more centered with a BEF loaded. Stock timing curve peak is 15.5° BTDC, where as an MHD pump flash is usually 8.5° peak. (Zero knock). You also won’t get throttle closures with JB4.

so whats causing the car to miss boost and under boost? I am on MAP 2 not map 0 so not sure why

This has to be a boost leak or vacuum line/solenoid issue.

I don't see any boost leaks. Im going to replace my solenoid and vacuum lines.

boost solenoid
11747626351

anyone have any idea of part number for vacuum lines?