89 burb tbi

[Lomax Anderson]

Hey yall I've got an 89 burb that got a new motor and seem to be having a problem...she idles rough and pops ...took it to the shop but they seem to be lost....so i cut my losses...any way it's got a new fuel pump,filter,injectors,o2 sensor,map sensor,coolant sensor,distriibitor,cap,wires...it runs roughh and pops in parkk and gets worse in drive ...the shop had it on a computer but said all was working...where to look now?? any help would be greatly appreciated

[pbouffard]

knock sensor maybe? i ahd a wire to the knock sensor shorted to gound asnd it didnt even run, how much fuel is the injectors pushing, whats the fuel pressure? is you wire for the distributo tiing plugged in, is the tiing right, you have to time it with the purple distributer wire unplugged. have you grounded out each sparkplug individually? to see if one is not fireing, or put a timing light on each wire to check that way? even though the truck has a computer, that piece of **** doesnt help much in diagnostics, also i had my computer go bad and the test equipment didnt say nothing, when the computer fails it will n ot tell on itself. that came from a very good mechanic on trucks our year like this.