Ka24de Misfire - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

TwoForties · 02-18-2015, 09:54 PM

Hey guys, I bought a 91 240sx coupe the other day with a stock ka24de(besides catback) and on the drive home it seemed like it had some problems; lacking power, idle shakes, etc... I have been starting it multiple times, but have not driven it since then. The car failed to start once, but usually starts right up. I unplugged the spark plug wires one at a time to find out that cylinder #1 wasn't firing. I switched the spark plugs around to find out that they weren't the issue. I then tested the spark plug wire for conductivity, which gave good results. I ohm tested the fuel injector connectors and they were even across the rail. The MAF sensor wire connector seemed loose. And it seemed to be missing a metal piece into which I think the MAF signal prong connects to. I'm not sure if that is meant to be or not. I have done some research to get to where i'm at now, but I don't know what else to check and I could use some guidance to help me find the problem.

jza80king · 02-19-2015, 09:30 PM

I would suggest pulling any codes first. That might lead you to what is causing your issue.

TwoForties · 02-22-2015, 10:23 PM

The fuel injector was bad. Switch them around and the misfire came along.

02-18-2015, 09:54 PM	#1
TwoForties Join Date: Feb 2015 Location: NJ Age: 28 Posts: 34 Trader Rating: (0) Feedback Score: 0 reviews	Ka24de Misfire Hey guys, I bought a 91 240sx coupe the other day with a stock ka24de(besides catback) and on the drive home it seemed like it had some problems; lacking power, idle shakes, etc... I have been starting it multiple times, but have not driven it since then. The car failed to start once, but usually starts right up. I unplugged the spark plug wires one at a time to find out that cylinder #1 wasn't firing. I switched the spark plugs around to find out that they weren't the issue. I then tested the spark plug wire for conductivity, which gave good results. I ohm tested the fuel injector connectors and they were even across the rail. The MAF sensor wire connector seemed loose. And it seemed to be missing a metal piece into which I think the MAF signal prong connects to. I'm not sure if that is meant to be or not. I have done some research to get to where i'm at now, but I don't know what else to check and I could use some guidance to help me find the problem.

02-19-2015, 09:30 PM	#2
jza80king Leaky Injector Join Date: Aug 2014 Location: Utah Posts: 92 Trader Rating: (0) Feedback Score: 0 reviews	I would suggest pulling any codes first. That might lead you to what is causing your issue.

02-22-2015, 10:23 PM	#3
TwoForties Join Date: Feb 2015 Location: NJ Age: 28 Posts: 34 Trader Rating: (0) Feedback Score: 0 reviews	The fuel injector was bad. Switch them around and the misfire came along.