shaking after changing injector!

[PeekayzS13]

Ok, I swapped out injector and after I drive for a while I let it idol and it shook a little.
Then upon pulling off I noticed a lil puff of white grayish smoke.... Help.

[Vernal]

the spark plug might be fouled in that cylinder

[PeekayzS13]

Should I re-gap...??

[Vernal]

definitely check it.. plugs are cheap

[PeekayzS13]

Ok, I pulled the plugs... No oil or gas present on any. So I r thanks e-gapped and shuffled em around. PRESTO!!! no more shake. Now I have a idol issue. I rev and it drops to 500rpm (lowest) then pops back up to bout 800-900rpm... Any ideas? Thanks for the spark advice dude....

[94spitfire91]

I thought those rpms were normal.at idol? Ha that's what both my 240s idol at

[PeekayzS13]

I think 900rpm is average or guud. But it should not drop down like that. And when I press the pedal, it boggs then jumps up to par.

[DinoMan]

clean your iacv maybe

[PeekayzS13]

I.was told its connected to the intake manifold... Right???

[PeekayzS13]

Ok, I found a crack in the hose from the break booster to iacv. Fixed it.. Still a slight shake when idling. And I know the timing is off. Been seeing "bad motor mount" blogs... Maybe ill check tmorrow... Can anyone advise what to look for?

[!Zar!]

Make sure that your injectors are seated fully and do not have torn o-rings.

Did you spray the injector o-rings with silicone spray before install?

[PeekayzS13]

Silicone.... I've never heard that one...

[boosted KA24DE]

I use di-electric grease because it does not make the o-rings expand prior to seating them in the rail. it cost two bucks anywhere. Any thing that has a too much of a petrolium base will cause the rings to swell and you will have to push so hard that they bind and usually spin off the inner walls of the rail causing them to deform. trust me DI-ELECTRIC grease I have fixed two cars this pat month alone by doing this.

[ultramagnus]

Are all your injectors pulsing properly ? i've seen this happen on single cam KA and my 4ag when i had efi. your injectors might not be seated properly just wiggle them to see if the idle changes. usually it's the spray pattern if it's not consistent it usually sputters.

[PeekayzS13]

I haven't checked all the o rings. Maybe I should just go threw and replace then all... That's inexpensive..

[conrad_s13.5]

i just lube the o-rings with gear oil i have laying around,.....thats what a master tech at nissan told me to do anyway

[PeekayzS13]

Well today my day off.....so I'm gunna try the o rings

[LimeLite Racing]

Make sure that your injectors are seated fully and do not have torn o-rings.

Did you spray the injector o-rings with silicone spray before install?

Ding ding ding. And shoot for 750, not 500. Or 900.

[PeekayzS13]

So I should idle at 750?

[LimeLite Racing]

Absolutely.

[PeekayzS13]

Fo shizzle... Thanks limelight.

[PeekayzS13]

QQuestion.... It iacv is closed sompleatly ..should car stall??

[LimeLite Racing]

No problem man, and that depends. Your IACV is closed when the engine is cold, and as it warms up the IACV opens. So if it's stuck closed you would stall. (Given your engine is warmed up.)