95 S14 SR20 rough idle (not plugs)

[JDMwannaBE]

i have a 95 S14 and i just installed an SR20. everything is working great it starts every time, but has a rough idle like its missing but i checked the plugs and replaced them with the proper gap. ive checked the coil packs and their voltage, they are all getting spark. i've checked all the tech forums and i cant find my answer so i thought id ask. thanks for your help

[2plus4plus0eq6]

did u check the aicv and the maybe try adjusting the idle screw. Could be a vacuum leak or something too. maybe its your timing?

[JDMwannaBE]

yeah im trying that stuff right now, thanks for you help though

[kamikazekid]

Id deffinently go with the timing first, but those motors get alot of build up in em so try a simple injector cleaner or some kind of engine detergent like sea foam. goes in throgh the brake booster line, let it sit, start it and watch the crap blow away.

[2plus4plus0eq6]

I've heard that you can almost put that stuff in anywhere like where you pour in your oil. True?

[SINxSELEKTAH]

several things can cause rough idle

-vacuum leak
-misadjusted timing
-carbon build-up
-hot spots
-misadjusted throttle plate
-misadjusted IAC

[JDMwannaBE]

its actually more like its missing rather than a rought idle.

[bigOdom1]

Timing First 15 degrees then check for all the hoses and coupler for leaks make sure that the radiator is full, assuming this is a fresh install new fuel pump? fresh gas? probably needs to run a little just seeing as how new swaps have usually been sitting for a while.

[rob3725]

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[JDMwannaBE]

we figured it out, the IAC wasnt getting proper voltage so we're double checking the wiring. thanks for all your help everyone!