Jump to content

1971 Datsun Truck - Need Help

Recommended Posts

  • Replies 23
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

You need fuel and spark to start and run an engine.


Check the fuel level is at the line on the glass front of the carb. If full than it's at least getting that far.


Is the choke plate closing on the carb?

Link to comment

Engines are simple.  Compression, Ignition, Fuel.  All three, at the right time, and the engine runs.  Millions of engines prove that everyday.

I am guessing you do not have a compression tester.  Does the engine have a rhythmic sound, like four cylinders getting hard to turn, in order?  Or does it just spin freely, with a noticeable difference once every four counts?


If it has a nice rhythmic sound, crank it a little, then go and smell the exhaust pipe end.  Smell gas, suspect ignition.  do not smell gas, suspect carburetor.

Link to comment

truck starts sometimes runs for a minute then dies why

Does it run good for that minute, or does it run like crap?

How long before you can start it again, and how long do you have to turn it over before it starts again?

When did it start doing this, after you changed something?

Is the truck new to you?

What did you do to determine that it has fuel?

Link to comment

sounds like a spark problem did you check with a timing light that #1 is firing somewhere between tdc and 10btdc, even if its just turning over, mark your pulley with a paint pen i use red for tdc and white at 10 btdc 



have you had it running since the timing chain replacement?

Link to comment

You need to start at the start, turn the engine to TDC, then remove the valve cover and check to see if the cam lobes are at 10am and 2pm, then remove the distributor cap and look at what post the rotor is pointed at on the cap, on an L16 it should be pointed towards the upper radiator hose outlet I believe, that post should lead to #1 plug, firing order is 1, 3, 4, 2 counter clockwise, it really doesn't matter which post the rotor is pointed at, as long as that wire goes to #1 plug.

All the valves should have about 10/12 thousands clearance.

Link to comment

runs like carp sometimes right away sometimes slower in december it died then i change the timing chain and gear had truck for 6 years carb has gas in sight glass

sounds like a stock Hitachi, have you tried another carb?  Those things are a bitch to square away, 

Had a similar issue and it turned out to be a vacuum leak under the intake mani.  

Link to comment

could be a combo of both, I even had my Hitachi professionally rebuilt and it still didn't run right. Try to get ahold of a weber 32/36 if you buy one get it from Redline not weberdirect you want the one made in Spain not china, do a rebuild from the intake up using the correct  gaskets I would recommend the manual choke.

Link to comment

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.