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Discussion Starter · #1 ·
Just got my new grimmspeed 3port installed last week but I can't get steady boost above 3500rpm, I wonder if this is boost cut or fuel cut?

The load/map will go from 140/158 to 260/304 (about 29psi) at 2500rpm to 3500rpm, then immediately drop to 150/178 (stock) all the way to 7000rpm. I didn't get any CEL or violent fuel cut.

I even bump my WGDC to 100% at all cell to see if it make any different, increase boost limit table and increase boost target but it doesn't make any different. I'm using tehphrav3 btw and use 3 altmap to play around boost setting, but all exhibit same problem.

Anyone can lend a hand here?

Cheers!
 

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Discussion Starter · #2 ·
Here's the datalog. Notice right after 3406rpm, the boost and load start dropping. Any clue?

TPS RPM Load Timing MAP WGDC_Active WGDCCorr
82 2063 89 24 114 100 0
86 2117 95 21 119 100 0
87 2250 111 20 132 100 0
87 2406 127 17 146 100 0
87 2523 138 15 157 100 0
87 2570 142 14 162 100 0
87 2750 164 11 191 100 0
87 2805 172 11 200 100 0
87 2930 189 9 222 100 0
87 3008 200 8 232 100 0
87 3023 206 8 238 100 0
87 3117 217 7 253 99.5 0
87 3125 225 7 260 99 0
87 3195 231 5 266 98 0
87 3211 239 5 275 97.5 0
87 3250 245 4 283 96.5 0
87 3273 250 3 289 91 0
87 3313 252 3 292 90 -5
87 3359 255 3 296 89 -5
87 3406 247 4 294 88.5 -5

87 3461 227 7 279 87.5 -5
87 3492 208 8 261 86.5 -5
87 3508 189 9 247 86.5 -5
87 3500 175 10 233 86 -5
87 3516 161 14 212 86 -5
87 3531 150 16 200 85 -5
87 3570 141 18 188 84 -5
87 3602 134 20 176 82.5 -5
87 3633 127 23 169 82 -5
87 3641 125 24 162 81 -5
87 3672 123 24 158 80 -5
87 3680 125 23 157 79 -5
87 3695 130 22 158 78.5 -5
87 3727 139 19 166 77 -5
87 3750 147 17 172 76.5 -5
87 3781 155 15 182 75.5 -5
87 3797 156 15 186 74.5 -5
87 3820 155 15 188 74 -5
87 3836 152 16 185 73.5 -5
87 3852 148 17 182 72.5 -5
87 3883 145 18 180 72 -5
87 3898 144 18 178 70.5 -5
87 3922 142 19 176 69.5 -5
87 3945 142 19 176 69 -5
87 3969 145 19 177 68 -5
87 3984 147 18 178 67.5 -5
87 4008 147 18 179 66.5 -5
 
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