Hey guys its been awhile since i have posted on here so here is a little update. The motor that took me so long to rebuild is finally done. Acctually, i have almost 2,000 miles on it! So anyways. It seems to idle pretty high (950ish) and when i blip the throttle in neutral it just dies when it goes to settle back to idle. It sputters then just dies. What in the world could be causing this? Sometimes instead of dieing the idle goes reallllly low then it takes a second for the motor to catch back up. Its very odd. thanks in advance guys

Suggest you check the ballast wire...could be loose.

FI or Carbs? If it's carbed, sounds like the idle mixture may be off. I'm an SU newbie, but I've had carbed cars do that before. As for FI, dunno about the Datsun system, but my Miata has an adjustment for that. Sorry I couldn't be more helpful.

Hey guys its been awhile since i have posted on here so here is a little update. The motor that took me so long to rebuild is finally done. Acctually, i have almost 2,000 miles on it! So anyways. It seems to idle pretty high (950ish) and when i blip the throttle in neutral it just dies when it goes to settle back to idle. It sputters then just dies. What in the world could be causing this? Sometimes instead of dieing the idle goes reallllly low then it takes a second for the motor to catch back up. Its very odd. thanks in advance guys

more information is needed here . What are you running SUs , Injection , Webbers What ? What ignition , points , vacume advance or not ? Timing set at ?