LT1 might be LTjunk
#61
also if you have a laptop get an aldl cable and download datamaster and tunercat. the programs are free trials. and the cable is 50 or 60 bucks and is worth its weight in gold. you can log and then email them to someone to diagnose.
#62
Car is cooling down now going to put o2's back on and go for a spin again.
I am close now I think THANKS TO ALL that got me this far.
#64
I know right!!
So o2's are back went for the drive with MAF unplugged Problem remained and SES light came on. Make a stop-Car off- Plug MAF back in-Start Car. SES light off and Drive home and Problem still remains. Get home check for codes and I get nothing no codes flashing at all not even code 12. It has to be the PCM right?? Cause it not storing codes and from closed loop to open loop its a night a day difference. The engine shut off when I pulled the MAF connector. It runs smooth at low RPM's as soon as it down shifts it runs like crap...
#65
The fans coming on as soon as you turn the key might be an indication of a screwed ecm. A couple years ago mine died at the track, thought it was the fuel pump so I pulled it home. It would start and idle but I couldn't give it any gas at all or it would die. Started it up and was poking around under the hood and I just happen to bump the ecm and the fans went off so I reached over and nailed the throttle and she revved fine. Tapped on the ecm again with a screwdriver and the fans came on the car died.
What happened was I took the ecm apart a few months before that and unsoldered the chips from the boards and put sockets on the boards then put the chips in the sockets. This was so if something screwed up while tuning at the track (like loss of communication or power, I was having trouble with that at the time) I could just pop the chips out and put another set in and be on my way instead of having to send the ecm off to restore the chips. Anyway, one of my solder joints broke loose and that was the prob. Soldered it back together and was on my way, til a year or so later and it did it again and I got a new ecm. Might wanna check that out. Turn the key on and if the fans are on then tap on the ecm and see what happens. Might even fool with all the connectors going into it. Doesn't cost a dime to try it and if it works I won't charge you a thing.
What happened was I took the ecm apart a few months before that and unsoldered the chips from the boards and put sockets on the boards then put the chips in the sockets. This was so if something screwed up while tuning at the track (like loss of communication or power, I was having trouble with that at the time) I could just pop the chips out and put another set in and be on my way instead of having to send the ecm off to restore the chips. Anyway, one of my solder joints broke loose and that was the prob. Soldered it back together and was on my way, til a year or so later and it did it again and I got a new ecm. Might wanna check that out. Turn the key on and if the fans are on then tap on the ecm and see what happens. Might even fool with all the connectors going into it. Doesn't cost a dime to try it and if it works I won't charge you a thing.
#66
#67
And may I suggest:
Unbolt the two bolts that hold ECM in place. Pull it up out of the hole. Unplug all 4 connectors, and plug them back in. Do this 3 times.
If no change:
Borrow a functional ECM, plug and see if issue resolved.
If no change:
Replace fuel filter again; you shook all the gunk loose when you dropped the tank.
If no change:
Take the opti off and replace with a new one under warranty... MSD DOES offer a warranty with their overprice POS, right? If not, contact me by PM and I'll tell you how to buy a GM opti for 325 new.
Unbolt the two bolts that hold ECM in place. Pull it up out of the hole. Unplug all 4 connectors, and plug them back in. Do this 3 times.
If no change:
Borrow a functional ECM, plug and see if issue resolved.
If no change:
Replace fuel filter again; you shook all the gunk loose when you dropped the tank.
If no change:
Take the opti off and replace with a new one under warranty... MSD DOES offer a warranty with their overprice POS, right? If not, contact me by PM and I'll tell you how to buy a GM opti for 325 new.