620 crank no start

[sergio620]

Hello I have a 1979 620 l20b I turned it on after driving and it was bogging and wouldn't accelerate then it stalled out. Then I would try to start it again yet it would only crank but wouldn't turn on any input? Ignition coil? It's running a Mallory ignition coil btw Thanks in advance

[datzenmike]

You need gas and spark to run....

 

I hate after market crap that used to have a reputation. The only coil made for your year truck is the one from Nissan. That 'Mallory' coil might be intended for a distributor with points. The high power Electric Ignition you have in your '79 will over heat and fry a points coil.

 

Pull a spark plug wire off and stick an old plug in the end. Lay on a grounded surface and crank the engine over. Got spark?

 

If yes I'll assume it's alright for now, and say there is a fuel problem.

If no/not sure, put your good original coil back in.

 

[LenRobertson]

This thread concerns a B210, but a lot of the ideas for trouble shooting will apply to your truck.

 

http://community.ratsun.net/topic/72362-79-b210-wont-start/

 

As datzenmike says, check for spark using a plug. If you have good spark, then on to checking fuel issues. See if you can narrow your problem down a little using info in the B210 thread, then we may be able to help with more specific things.

 

Len

[ratsun.818]

Check for spark if any. If it's fuel related it might be your fuel pump m8 I've ran into this before as well