if it has a security light on gm late 90’s early 2000’s are notorious for faulty security system that cuts power to the ignition to get the car started it happened to me with my impala 3800 series two and it was the immobilizer swapped it out and it sang like a bird againI have been in and out of forums, TSBs, YouTube hacks and other DIY tutorials for almost a week and think I have a unique situation on my hands. Thought I'd throw it on here and let you guys chew on it for a while.
Bought my 98 Olds with the last of my tax refund about a month ago. Car was tip top inside and out (as far as I could tell) and paid cash on the spot and drove her home. After about two weeks of errands and a few highway trips, the car was great. One day the wife drives it and it overheats. She pulled over to let it cool and called me up on the cell. I arrive shortly after with fresh water and we drove it back to the house. Put the water hose in the radiator and its almost completely empty. After filling, I take it on a test run. Everything seems good, so i punch it to hit the exit and come home and BAMM!! Hydrolock! Tear it down and found out about the UIM/LIM Problems on the 3800. And on top of that, bent a rod on number 5 cylinder.
Found and fixed the hole in the Upper and pulled the piston and replaced the rod, even replaced rod bearings since I was down there already. Got everything buttoned back up with new bolts, gaskets, plugs, and fluids. Unfortunately I have a crank no start do deal with now. I have good spark on all 6, and know I've got fuel cause they came out wet after cranking for almost 20 seconds. Tried again the next day and she still wont turn over. Did some more research on everything from VATS to Ignition Modules to Body Controllers. Nothing comes close. All fuses good. Checked Cam and Crank sensors and timing (good also) but changed the sensors anyway just because I don't want to mess with it later.
It's been three weeks of hair pulling and nail biting every time I turn the key and still got nothing. Open to suggestions/comments/inspiration. Need this car up and running cause its all I got to find work and make money for the "toys" to add later...