gaping iridium plugs???

[drew_ladue]

i just bought NGK iridium spark plugs and put them in my 2006 wrx TR. does anyone know if iridium spark plugs need to be gaped?the guys at the autoo shop said they didnt need to be. now my wrx is bogging out and sounding like its backfiring anytime i floor it. it doesn't do it when i moderately accelerate and the turbo still spools up. the only things i moved to put the spark plugs in was my perrin intake and the battery. i made sure to tighten down the plugs and the coil packs.the only mods i have are the perrin intake and hks exhaust. anybody have any idea what might be the problem?

[T0rque]

you dont gap iridium. Kinda like you dont google chuck norris.

Your positive you got all connections correct, all coil packs on correct and in correct locations?

[drew_ladue]

yea. 2 of the plugs i took out were really loose actually. do spark plugs need to be "broken in"?

[T0rque]

Nope. Lightning bolts spark until they cant spark anymore.

[drew_ladue]

haha. i'll agree with that statement. im just gonna have to take it to a shop tomarrow and see how much money they wanna rob me for.

[brfatal]

HKS catback or HKS turboback?

[T0rque]

HKS catback or HKS turboback?

Is the new HKS downpipe catted? I havent seen a new one yet, I heard they did a redesign.

[brfatal]

Redesign? There have been 2 different HKS downpipes for a little while now if that's what you're thinking of.

[T0rque]

Redesign? There have been 2 different HKS downpipes for a little while now if that's what you're thinking of.

Last time I bought one (04) they had 1 design.. sorry..

Anyway if your not running a cat this could be your issue.

[drew_ladue]

im not sure which one it is. it was on my wrx when i bought it. and i dont think thats the problem cause it was working fine before i changed the plugs

[brfatal]

Iridiums come pre-gapped according to the model number your order, so if you got the right part, they should be ok out of the box. Attempting it will potentially ruin them.

I asked if it was a turboback because being catless would explain the afterfires as well as driveability problems (along with that intake, which needs to be tuned for).

[T0rque]

well you disconnected your battery so the idle & air/fuel ratio had to relearn.. If you have a catless exhaust systems 06+ have had issues running catless. It may be the problem..

The other issue may be... Do you have any CEL? I would suggest going out turning off all electrical items...

Disconnect positive cable for 5 minutes

Reconnect battery cable.

Start car and let idle (no electrical items on, do not touch the throttle) for 10 minutes.

Go drive, see if that helped.

[drew_ladue]

k.i'll try that.my check engine light will blink 4 or 5 times if i let it bog out for a little. it doesnt come on if it just does it for a second or 2.but normal conditions is it is not on. the only electrical item i have is the radio. unluss you can think of anything else thats stock. how would i go about tuning my car?

[kbrok]

i mean it wouldn't hurt to take one plug out and make sure they are gapped correctly maybe they grabbed you the wrong box which im sure didn't happen. I believe factory specs on the wrx ask for .030

[pzr2874]

how would i go about tuning my car?

One step at a time bud