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Drop below idle speed on decel

Davey G
Davey G
in Fuel Injection

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Posted
comment_322927

Upon deceleration of my '78 280Z (EFI) the rpm drops past the idle speed of 800 down to around 500 or less, sometimes stalling. I currently have to keep my idle speed set around 900 rps for it to not stall. Anyone have an idea why this is happening?

  • 2 weeks later...

  • Author
comment_323946
Many things can cause that. Vacuum leaks, bad BCDD, bad altitude switch (Cali cars), bad EGR, etc.

Would it narrow the diagnosis any to add the fact that it seems to pulse @ idle, from 700-800 rpm like I'm playing with the gas pedal...but I'm not?

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