1988 K2500 4WD 5.7 CUST JUST PUT IN NEW ENGINE LONG BLOCK INSTALLED IT HIM SELF BRIGS TRUCK TO ME SAYS ENGINE RUNS ROUGH HESITATION STALLING AT TIMES .

WENT THROUGH NORMAL DIAG PROCEDURE CODE 43 FAULT CODE CHECKED ECM UP DATES INSTALLED NEW UP DATED PROM , P... Login to read more.