gm good wrench from jegs carb to tbi does anyone have a idea

[young42090]

well i have a 1989 chevy full size blazer i decided to get a gm good wrench. crate motor from jegs. and wanted more horse power so went with the 260 hp but wasnt for my tbi motor is actully for a 85 and under carb. guy at jegs said ya np just get a tbi adapter use original ditrubitor out of my 89 and plug and play. well havent had nothing but problems. i went to set igniton timing and set tdc and dropped distributor in pointing at cylinder 1 and damper set at 0 degrees. i cant even get the motor to idle runs for about 10 second perfect and backfires threw the intake. try retarding dis. as many degrees as i possibly could didnt change anything. has anyone ever done this or have a clue whats wrong here any info would be greatly appreciated. thanks. if u need more info i will give u what u need lol. i also tryed to just send the block back but thats not a option even though i was giving false information. lesson learned.
to all a good day

[34_40]

Only thing to do is start with all the basics. Verify there are no vacuum leaks, verify you are actually putting 12 volts into the distributor, verify a good flow of fuel into the carb. Did you pre-lube the motor/lifters?

Also verify the firing order of the camshaft and the way your using the dizzy, are they wired the same? Probably are but.... we need to eliminate any errors.

[jerry clayton]

Isn't there a wire you have to disconnect somewhere on the firewall while you set the timing???

do a search---------theres a connector in the wire --all you gotta do is disconnect--------set to initial timing and then plug back together for the ecm to work

on passenger firewall tan wire with black stripe

[t-top havoc]

^^^
What he said...

Get out the Chiltons or Haynes manual to ID the wire.