bad idle, and backfiring when revving

[ken240sx]

i changed the plugs and wires before i started the thread and the problem didnt change. but i'll get to the maf wiring either today or tommarow.

[ken240sx]

GUESS WHAT!!!! 99% of my problems are fixed!!!!!! redid my whole short ram intake and instead of putting breathers on my valve cover and iacv i put hoses connecting to my intake like they were stock. I also foudn a vacuum port i forgot to plug up when i was bending a few others out of the way for something and i was like OH SNAP!!! i have a leak! I also tightened all the connections for the ECT, TPS, and MAFS with some needle nose pliers. Now my engine idle isnt jumping up and down and I can rev it without backfire or bogging and it doesnt even come close to stalling after I rev it. I'm so happy!

Thing is, just when I thought my problems were completely fixed, the idle dropped to about 400 and sounded like it was gonna die, but then jumped back up to 900 and it does this every minute or so...as long as its not dying i don't have a huge problem with it right now because i'm just to excited that it's not stalling anymore.

I'm thinking that my IACV-AAC may be bad, because the idle seems to be similar to people who have bad ones...I cleaned it, I'm just gonna get a used one and see if it changes things. If anyone has any other ideas about what it may be feel free to post them.

[180fan]

yeah does sound like an iacv-aac is beginning to go. Glad everything else is fixed on your ride though!

[ken240sx]

me too, i can finally go get it inspected and put it on the road again after i get my new rims and tires...OH YEAHH i'm bringin that baby to the track first chance i get, i'm hopin for a low 15 sec 1/4 mile...high 14 would be great though...

[Arrow]

It's great to hear the good news! I still haven't solved my issues... =/ I just hope that sometime today or tomorrow everything gets fixed since I took it to a shop and this is the third day that they've had it (and they've eliminated somethings - but not found the problem... grrr)

[ken240sx]

Correction...PROBLEM FIXED!!! apparently the gasket **** i used between the egr block off and the intake manifold wasn't working to good and if i put my finger next to it i could feel air sucking in, so I cut a new gasket and now it the car runs like brand new. The idle is now at a perfect 700, i need to adjust it to 750 tomarrow. but the idle is rock solid and no jiggle what so ever...i took it on the road for a minute and it works great, no bogging or hesitation, or running rich, it just runs perfect. i'm amazingly happy once again, thanks everyone for the ideas, i had a feeling in the back of my head the whole time that i was gonna find something so small and stupid like a vacuum leak...i'm just an idiot and i checked it a few times and didnt find any...but hey at least its fixed!