starting issues plz help

[zman525]

Hello, im having a serious problem trying to get my 1972 datsun 240z started. All the plugs are recieving a spark and fuel is reaching the carbs without any problem. The engine will just turn over until it lets out a massive backfire in which it actually blew my muffler in two, however, it only does this occasionally. Does anyone know what the problem may be?

[MikeW]

Are you sure the timing is right? It sounds like you're getting spark but at the wrong time.

[zman525]

it could be the timing cuz i did replace the distributor rotar, cap, and new wires. how would i go about adjusting the timing. I looked it up quickly in a chiltons manual but left me confused =(

[MikeW]

Was it running properly before replacing the cap? Could it be 180 degrees off? Are you sure you replaced the wires properly?

[zman525]

i matched it up with the firing order in the chiltons manual, and i wasnt able to turn the rotar 180* so im assuming thats all correct

[zman525]

and no it has not run for about a year... i went through just about everything in the carbs and ignition and i just dont know...

[zman525]

hmmm im lost... i still cant figure it out