KA24de Misfire?

[s14tan]

So my car sounds like its misfiring, I checked if my wires were sparking with a spark tester thing my friend had and they all had a spark. but yeah, When I'm stopped at a light or something my car shakes erratically. (only when it warms up) But Idles fine when The AC is on and as soon as I turn it off the car goes retarded. WTF?

IACV?Is there a way that I can clean it without removing it?(spray carb cleaner into the hose form intake?)

Cap and Rotor?Spark plugs gaped wrong?Bad injector(s)?Timing? Fuel filter?Knock sensor?Bad o2 sensor(s)?

What can it be?

I recently replaced the MAF and it ran a Little better but still is super rich.

My car is having problems after problems for the past 2 months.I wanna go KAT but I can't till my motor runs right.Help me out guys, I'm stuck.

[chrismo240sx]

you mentioned all the tune up things such as cap and rotor and whatnot....did u change any of that? If not i reccomend you do

@ wekks ago my car was running terrible and slow i gave it a tuneup with everything u mentioned except the knock sensor and what a difference it made. So i would suggest a tuneup, then come back if it still is acting up.

[s14tan]

I've replaced the majority of those parts already but had no luck or improvements at that matter.

only thing that has not been replaced it the knock and o2 sensor (before cat)

[blknblu]

are you running electric fans or the stock fan?When I switched to electric fans my idle went down. Adjusting it back up and checking/ setting timing fixed my crappy idle and hesitating on take off from a stop problems.

[blknblu]

Sounds like the AAC is working properly and bumps up your idle when you turn on the A/C. IACV will bump up your idle for cold engine or increased electrical load. You can clean iacv without removing it. search...

[nifares240]

Reminds me when I just got my car and driving it back to my house. Car just shut off completely coming on to a stop but with the AC on, car would just idle fine and not shut off. What I found is I had a massive intake leak. Check your vaccuum lines to see if any lines are open.

[s14tan]

I have the stock fan still.

How would I hunt down a vac leak?Look for a hose that's disconnected?any tips? AC leak detector stuff?

I did search on how to clean the IACV without removing it but I had no luck.

[s14tan]

no one?