I was driving the car today and it just lost all power.All the dash lights came on and power steering went hard,and it died .I tried cranking it but it just turns over and wont start.It turns over just fine.Check battery voltage and had 12.6 volts,only went to 11.5 when cranking.checked both sides of all fuses and getting power to both sides,no blown fuses found.even crank fuse under dash pulsed on both sides when cranking.Plugged in reader to check codes,no current or historic codes found.I used the reader to scan the data while cranking,all data seemed to read correct except i did not see any rpm's register while cranking.I used a good spark tester to check spark,did not have any.I pushed the needle in on the fuel pressure check port while cranking and did not have any fuel come out.I tapped on the gas tank[a little trick i picked up] but to no aval.I even[ sprayed intake cleaner into the throttle]while cranking another little trick i picked up to check the fuel pump.It did not work ether.I had a known good module and coil pack from another 92 buick lesabre with the same engine and swapped them to rule that out.It did not help,same problem.When i checked the cam sensor i had power,ground,and pulse at cam sensor,but when i checked the crank sensor i only found ground.No power or pulse using a test light on both.I think the ecm might be bad, but i can read the data and check for codes.In the engine compartment there are six or seven relays but i do not remember which is what,and they are not labeled,they are on the fire wall behind the engine.Other than swapping the ecm out to try next I'm not sure were to go,as i have not really worked on gas engines since i become a diesel and allison transmission tech about four years ago.I have forgot a few thing since then.
Apr 9, 2008 at 11:30 PM