240SX (single cam KA) misfiring on cylinders 1 and 4 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

robinsone · 04-01-2015, 06:54 PM

Ohm the injectors, they could all be bad. There are online factory service manuals you can get to properly diagnose the problem, those will help. Your idle air control valve iacv could be bad as well that happened to me. You can use the DOHC iacv on the SOHC I did and worked fine. Check your timing, vacuum leaks, the rubber intake hose just before the throttle body are notorious for dry rot, that happened to me. Too many things to mention, make sure your grounding is sufficient too. Here's a link.

http://www.nicoclub.com/FSM/240sx/1989/1989.pdf

04-01-2015, 06:54 PM	#1
robinsone Leaky Injector Join Date: Oct 2009 Location: Chicago, IL Age: 46 Posts: 129 Trader Rating: (8) Feedback Score: 8 reviews	Ohm the injectors, they could all be bad. There are online factory service manuals you can get to properly diagnose the problem, those will help. Your idle air control valve iacv could be bad as well that happened to me. You can use the DOHC iacv on the SOHC I did and worked fine. Check your timing, vacuum leaks, the rubber intake hose just before the throttle body are notorious for dry rot, that happened to me. Too many things to mention, make sure your grounding is sufficient too. Here's a link. http://www.nicoclub.com/FSM/240sx/1989/1989.pdf