OK, guys... I need some help, please. I converted my 870 to a 165 a while back, and I'm having a few problems...hope you can help. Something is just not quite right here. I have back-probed the connectors, and all the voltages seem to be correct, according to the FSM. I ran new wires to the ALDL connector, because the old ones were in such bad shape....20 yr old wiring!! The car has taken to not starting, recently....I've checked everything: has spark (Nearly knocked me to the floor when I accidently grabbed the coil), has fuel (38#'s at the rail), new maf....but just cranks, and cranks, but won't ever catch....tries to, but won't. Timing is set to 10*, and is right on the money. Does this for a few days or weeks, and then wham! starts up??? don't know why?? I've tried to scan, but I CANNOT get it to connect at 8192, with any software. Tried Tunerpro RT, datamaster, turbolink, freescan....no sync. They all find the cable, and say it is ok. The TTS ALDL tester passes ALL the tests, both fast, and extended....I can however, connect @ 160 with WinALDL, or Tunerpro RT. Datamaster says it finds a GM 160 PCM (never been able to get a good answer on what that means, but I would guess it finds a 160 baud PCM)...Freescan says it get invalid header information...Turbolink just says it can't communicate....been chasing this for about 6 weeks, so I'm hoping I can get some help here on the Forum...BTW, I have an 85 vette, L98....
Checked the ignition module...it checks good, as does the coil.....ANY help would be most appreciated....

Cheers,
Michael

 

try and squirt some gas in the intake...........take the air cleaner duct off........if it's a fuel pump/system problem it will start but not for long.....can't help with the computer wiring