not firing on 3&4 [Archive] - SR20 Forum

: not firing on 3&4


Zuijyn
02-20-2010, 01:44 AM
Okay so one day...b13 se-r rolling okay... next day i sit down start her up and shake fillings out of my teeth... in the end i let it run, and start pulling plugs. 1 bogs.... 2 bogs... 3 nothing.... 4 nothing.....

so in the process of elimination. what can i look at that would cause two cylinders to stop firing at once over night.... havnt checked spark yet or plugs. but the wires are brand new. and again... over night they both stop at once.

i suppose it is possible that i was running on 3 and didnt relize it, but...cmon.. i doubt it.

Zuijyn
02-21-2010, 07:57 PM
4 is now firing. 3 has spark, but is not producing power. dont think it's getting fuel ... injector is my first guess? that makes sense right?

Mr H
02-22-2010, 01:22 AM
if the other cylinders are getting fuel and #3 isnt than try swapping injectors to be sure.

Im sure you would know if you were running on 3 cyl's man...it's like a 25% power loss lol.

what did you do to get #4 to fire?

Zuijyn
02-23-2010, 09:14 PM
if the other cylinders are getting fuel and #3 isnt than try swapping injectors to be sure.

Im sure you would know if you were running on 3 cyl's man...it's like a 25% power loss lol.

what did you do to get #4 to fire?

New plugs, new cap,, new rotor.

after that 4 was was firing. 3 stayed fowl.

darksideSE-R
02-25-2010, 05:49 PM
Check injector pulse, fairly easy. There are injector bulb kits that you can buy or you can do it the cheap way. You need a small light bulb in a socket with wires attached to it. A small junk turn signal light bulb and socket that I clipped off of a spare is what I use. Plug it into the electrical connector and with the car running the bulb should blink every time the injector should spray. You need injector pulse to make the injector work. This is something very easy to check and could lead you in the right direction.