Hi as title says '97 S52 / OBD 1
Has been running fine for a couple of years passes CA smog no problem etc.
COLD eng performs great revs fine pulls , no miss etc to redline.
BUT HOT As soon as it reaches 'normal' operating temp center of gauge.
it will give CEL and misfire at 2500-3000 rpm then rev semi cleanly
Have done new plugs, swapped coils/boots, chk for vac leaks, ohm tested
CPS, TPS. vot tested O2 sens. Still need to chk CTS and IAT sensor. reset DME. DME has TRM chip for OBD1 S52 stk inj and MAF. also have another 413 DME to try.
So any ideas are appreciated TIA :D
Has been running fine for a couple of years passes CA smog no problem etc.
COLD eng performs great revs fine pulls , no miss etc to redline.
BUT HOT As soon as it reaches 'normal' operating temp center of gauge.
it will give CEL and misfire at 2500-3000 rpm then rev semi cleanly
Have done new plugs, swapped coils/boots, chk for vac leaks, ohm tested
CPS, TPS. vot tested O2 sens. Still need to chk CTS and IAT sensor. reset DME. DME has TRM chip for OBD1 S52 stk inj and MAF. also have another 413 DME to try.
So any ideas are appreciated TIA :D
Comment