Jump to content

620 crank no start

Recommended Posts

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

Link to comment
  • Replies 3
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

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.


  • Like 1
Link to comment

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




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.



  • Like 1
Link to comment
  • 2 weeks later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

By using this site, you agree to our Terms of Use.