98 Northstar, cranks/backfires/no start
98 Deville, Northstar. Just died one day. Cranked,
but no start, with backfires and random hits and
misses. Discovered ICM was cracked and failed.
Replaced the ICM, loaded the fuel system, fired up
and ran for about 4 seconds, died. Tried to start
again, more hits and misses and backfires. Fuel
pressure is good (52 lbs), and I'm getting spark.
Weird thing is, it ran like a top for about 4 seconds,
then died. Reseated and cleaned the intake flap
behind the ps pump, all good there. Is there a learn
for the replaced ICM? What could cause this? Ran
perfect for 4- 5 seconds. Thanks guys and gals!