PDA

View Full Version : Ka24de rough idle HELP?

jasonfd3s
10-14-2010, 07:46 PM
hi, first off i have a 1991 s13 coupe with ka24de in it. the mods i have put on is injen short ram intake, dc headers, and a custom 2.5 inch exhaust. all the problem happend after i put on my headers? last night my car started to bog really bad (as when i step on the gas the rpm don't go up much) and just shut off. but the next day, it starts right up when i tried. i found my o2 sensor wire was melted on to my headers and i tought thats what it was but when i took off the wire, it was only the outside rubber protector was melted but not the wire itself. the o2 sensor itself was pretty black. with no way to diagnose the problem because the car was running, we changed new spark plugs, wires, rotor, cap and new o2 sensor. the car drivs ok right and hasn't shut off for two days, but now the rpm idles at around 500 instead of 700 and it jumps up and down 100 constainly when the car is stop. and sometimes when i step on the gas it bog for a sec before accelarating. i don't know if this would help, but the mechanic told me i am running rich because the old spark plugs were super black and burned. any idea or input would be appreciated thx.
c-los13
10-18-2010, 10:01 AM
try cleaning out the maf and resetting the computer by disconnecting the battery for a while. that should help. oh yeah check the grounds and listen for any vacuum leaks.
i had that problem forever too!
my final solution was to remove all emissions. GL
Fasterback
10-19-2010, 03:20 PM
Yeah you know what I'm having the same problem on my Ka24e. The only difference is that only one of my spark plugs (cylinder 2) is black well the others are fine. When I stop at a light it idles ruff just like yours, but I can smell straight gas hah. It makes sense because my gas milage is CRAP! If you figure it out let me know, maybe you we have the same problem and you can help me fix mine too. Its probably just a bad injector or maybe its the o-rings but yeah... let me know... Oh yeah, and ill let you know if I figure it out...
Fasterback
10-22-2010, 11:38 AM
Fixed my car... apparently it was the injectors so I picked some up from the junk yard and BAM! My KA is runnin smooth, just like BAM! Here is what was wrong with the worst of my injectors...

http://i538.photobucket.com/albums/ff345/oskye/IMG_3061.jpg
It was already cracked, but it completely broke when i took it off... TRASH...