'85 300zx spits and hard starts

[jerryparks]

Changed the Cylinder Head Temp sensor, which greatly improved the operation of my Z. However, it still takes several cranks to get the car to start, and it sputers for a minute or two before it mellows out. After this, it runs perfectly. Its a minor irratant, but one I want fixed. Any idea for correction would be appreciation. Could this be a 02 related problem? The car also has a de-cleration problem. The motor does not decrease in velocity as the car slows down, unless I leave the clutch out until I almost stop. If I engage the clutch during normal driving. the motor contunes to race and does not decrease.

[S14-NEO]

sounds like your IACV is jacked up..perhaps it may need to be removed and cleaned and or replaced..

[jerryparks]

What is the IACV? Where is it located? Thanks!

[S14-NEO]

its on the intake manifold ...should have two electrical connections to it..one for the IAC valve itself and the other for the FICD or fast idle control dentent..if i remember right its near the throttle body..its been a while since i last worked on one but it should be near there.