luigisho
SHO Member
Sounds like crank sensor. The 157 looks like MAF. 542 is a fuel pump that cuts off and that gets thrown whenever the call stalls for whatever reason.
MAF malfunction could cause erratic running. If it is replicable, and you unplug the MAF sensor and the idle or running smooths out, then the MAF is also an issue. THe car will run in defalut programming 'limp home' mode which doesn't usually stumble but performance is way down running in a closed loop program.
MAF malfunction could cause erratic running. If it is replicable, and you unplug the MAF sensor and the idle or running smooths out, then the MAF is also an issue. THe car will run in defalut programming 'limp home' mode which doesn't usually stumble but performance is way down running in a closed loop program.







