Reason I ask is that when my MS3 goes into Limp Mode, the boost limit (boost cut) is not operating.

FW is 1.4.1 on MS3-Basic.

Rev Limit Works. "No EBC" Works. Boost Limit does not work.

No responses on MSEXTRA forum.

@Reverant can you help me with this?

 

From ms3.misc.c, It seems to me that there should be something in the overboost section similar as to what is in the revlimit section that refers to Status7-LIMP. I have highlighted those areas in the copied info below:

if (outpc.status7 & STATUS7_LIMP) {
if (limit > ram5.cel_revlim) { /* Use lowest of the two */
limit = ram5.cel_revlim;
}
}

RevLimRpm2 = limit;
RevLimRpm1 = limit - ram4.RevLimNormal2_hyst;

/* random number based spark cut */
if (ram4.RevLimOption & 0x4) {
if (outpc.rpm > ram4.RevLimNormal2) {
spkcut_thresh_tmp = 254;
flagbyte10 |= FLAGBYTE10_SPKCUTTMP;
} else if (outpc.rpm > RevLimRpm1) {
unsigned char sc_tmp;
if (outpc.rpm >= RevLimRpm2) {
sc_tmp = 254;
} else {
sc_tmp = (255L * (outpc.rpm - RevLimRpm1)) / (RevLimRpm2 - RevLimRpm1);
if (sc_tmp > 254) {
sc_tmp = 254;
}
}
if (sc_tmp > spkcut_thresh_tmp) {
spkcut_thresh_tmp = sc_tmp;
}
flagbyte10 |= FLAGBYTE10_SPKCUTTMP;
}
// no else, initialised to zero on each mainloop pass
}

if (ram4.OverBoostOption & 0x03) {
int maxboost;
unsigned char ob1 = 0;

if ( (ram5.dualfuel_sw2 & 0x10) && (ram5.dualfuel_sw & 0x1)
&& ((ram5.dualfuel_opt & DUALFUEL_OPT_MODE_MASK) == DUALFUEL_OPT_MODE_FLEXBLEND) ) {
maxboost = (int)((((long)ram4.OverBoostKpa * (100 - flexblend)) + ((long)ram4.OverBoostKpa2 * flexblend)) / 100);
} else if (pin_tsw_ob && ((*port_tsw_ob & pin_tsw_ob) == pin_match_tsw_ob)) {
maxboost = ram4.OverBoostKpa2;
} else {
maxboost = ram4.OverBoostKpa;
}

if (outpc.map > maxboost) {
ob1 = 1;
} else if ((ram4.OverBoostOption & 0x04) && (ram4.boost_ctl_settings & BOOST_CTL_CLOSED_LOOP)
&& ((outpc.map - outpc.boost_targ_1) > ram4.boosttol)) {
ob1 = 1;
} else if (outpc.map < (maxboost - ram4.OverBoostHyst)) {
if ((ram4.OverBoostOption & 0x04) && (ram4.boost_ctl_settings & BOOST_CTL_CLOSED_LOOP)) {
if (outpc.map < (outpc.boost_targ_1 + ram4.boosttol - ram4.OverBoostHyst)) {
ob1 = 2;
}
} else {
ob1 = 2;

 

I'll have a look when I can.