Idle Issue

[nyci30]

Hi guys, im new here. I could'nt finda section for I30s.

I have an infiniti i30, 1998, 168K miles.

My rpms were knocking up and down when i got the car, so i replaced my knock sensor (had codes for it, and the rest of the stuff too) i replaced 2 coils, 6 spark plugs (Champion, Double platniums) other coils seem fine. I had a miss fire, it went away, no more SES light. I replaced my intake manifold gasket, fuel injector gaskets (o rings), throttle body gasket. And that was about it for replaceing stuff (under the hood wise). I recently did the spark plugs, and all my issues decreased, what it started out as was, my rpms idleing (in park) at 1100, knocking down to 8-900, switch to drive, they went to 7-500 knocking down. I did the work on the car, and it went away. Before i did coil and 2 spark pkugs (i had 2 iridium, i only had 4 champion at the time), the car hesitated BADLY to accelerAte, at 1800-2100 it would spit, like a sprinkler and wouldnt speed up. At 1200-1700 in drive, it would jerk the whole car and accelerated poorly. Now, it dont do none of that, now, my issue is similar, it idles in park at 1000-1100, and in drive at 7-800 (no more knocking, once in a while, only in drive, not a major rpm drop). Dont jerk or spit like a sprinkler, smooth acceleration. SOMETIMES, rarely, itll show old symptoms, like if i stop at a light, i notice its idleing at 1000ish in drive, and i release the break, and it goes on its own & is able to change gears on its own. When i switch to park\drive, itll shoot up to 2000-2500rpms and stay their. I have to turn the car off to stop it.

What do you think can be causeing this? I lookd EVERYWHERE, no lights are on, i messed with the throttle cables and the black thing on the IACV, i cant lower my rpms anymore, its as tight as it can be, cables got slack (not excessive). I just am lost, please help me ASAP. thank you!


P.s, i took the egr gasket off and left it off, i had codes for the solenoid, map\baro sensor, missfire cyldiner 3, i removed the gasker for the EGR and it went away, the map/baro sensor dissapeared on its osn, thd missfire, i replaced the coil.

[gsf1200s]

Try cleaning the MAF, this sounds similar to issues i had with my J30

[fourdrinie]

I would switch to NGK spark plugs....they perform much better on this car.

[nyci30]

Which kind of NGK is best? Mind sending a direct link to one and ill order all 6.

And, where is the MAF and.how should i clean it properly? What should i use, is it the box on top of my AI?

[fourdrinie]

Your owners manual or FSM will list the oem recommended plug...
Do a google search for cleaning MAF or search youtube

[nyci30]

Your owners manual or FSM will list the oem recommended plug...
Do a google search for cleaning MAF or search youtube

Well, google is sonetimes hard to find my answer, thats why i asked you where my MAF was, and how would i clean it