280 zx misfire/cold start condition - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

hchase17 · 05-02-2009, 07:00 PM

I have an 83 280zxt. When it has sat for a few hours it is hard to start. I have to hit the gas to get it to crank. Then it will run very rough for only a few minutes maybe 5 or so and then it goes almost completely away and just has a little misfire. It also backfires when I let out of the gas sometimes and while it is running rough when i first start it it sometimes backfires. I have put new temp sensors in it ( both of them). Does anyone know what it could be?

RGHilux · 01-10-2010, 12:19 PM

The ignition pickup and trigger wheel on the '82-'83 models is inside the distributor. Check the distributor shaft for play, and look for possible contact marks where the wheel might've contacted the pickup, indicating worn shaft bushings. Your ignition pickup itself may be intermittent as well. Since you say that it is backfiring at different times and rpm's, I would lean towards an ignition problem first.

Have you done any other regular maintenance lately like fuel filter, cap/rotor, plugs/wires?

05-02-2009, 07:00 PM	#1
hchase17 Join Date: Apr 2009 Location: Richmond, VA Age: 34 Posts: 2 Trader Rating: (0) Feedback Score: 0 reviews	280 zx misfire/cold start condition I have an 83 280zxt. When it has sat for a few hours it is hard to start. I have to hit the gas to get it to crank. Then it will run very rough for only a few minutes maybe 5 or so and then it goes almost completely away and just has a little misfire. It also backfires when I let out of the gas sometimes and while it is running rough when i first start it it sometimes backfires. I have put new temp sensors in it ( both of them). Does anyone know what it could be?

01-10-2010, 12:19 PM	#2
RGHilux Join Date: Jan 2010 Location: L.A. Age: 46 Posts: 3 Trader Rating: (0) Feedback Score: 0 reviews	The ignition pickup and trigger wheel on the '82-'83 models is inside the distributor. Check the distributor shaft for play, and look for possible contact marks where the wheel might've contacted the pickup, indicating worn shaft bushings. Your ignition pickup itself may be intermittent as well. Since you say that it is backfiring at different times and rpm's, I would lean towards an ignition problem first. Have you done any other regular maintenance lately like fuel filter, cap/rotor, plugs/wires?