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SR_Vlurs
09-25-2009, 09:03 AM
i have a decently built motor the head is completely Brian Crower, cams are 272 bottom end is stock bored but has eagle rods and cp pistons

when i start the motor in the morning it cant seem to hold an idle at all
it will fluctuate b/w 600 and about 1500 after about 10mins it'll get its normal idle which is 1100rpms the car has already been tuned im running a pfc d-jetro
any questions just ask
any insight would be greatly appreciated ty

Jeff
SidewayZ-s14
09-25-2009, 09:07 AM
Sounds like a normal SR to me LOL! Mine does the same thing. Check to make sure you don't have any vacuum leaks! Cams make your engine run that way also! :)
clark
09-25-2009, 09:23 AM
did you degree your cams???

yeah i agree with vac leaks..

also what kind of fluctuation is it? is it like "vroom.......vroooom.....vrooom....vrooom" or is it like "brat.brat.brat.brat"

lol what i'm getting at is...is it fast or slow fluctiation?
Sileighty_85
09-25-2009, 09:36 AM
Youp that normal, Mine does it too on stock cams sometimes
SR_Vlurs
09-25-2009, 10:20 AM
its not really fast or slow its moderate if that makes sense i havent found any vac leaks and yes the cam were degreed
SR_Vlurs
09-25-2009, 10:22 AM
ok i was just wondering since when i had it in my first chassis it didnt really do that but after i put it into my second chassis it started to do it
SidewayZ-s14
09-27-2009, 11:06 PM
ok i was just wondering since when i had it in my first chassis it didnt really do that but after i put it into my second chassis it started to do it

Another thing to to make sure you have is a proper engine ground. Engine to chassis ground.
96Turbo
09-27-2009, 11:12 PM
clean out the IACV??? that made a pretty significant difference on my RB. idles super solid now
sil80 monster
09-27-2009, 11:12 PM
^^^^..........agreed!
fliprayzin240sx
09-27-2009, 11:31 PM
What lift are those BC cams. I bet they are big lift (12mm lift) so they are loppy as fuck. I got the same issue with mine (Tomei Procams 272 12mm lift), loppy between 800-1500 rpm.
SR_Vlurs
09-28-2009, 09:20 AM
SidewayZ-s14 (http://zilvia.net/f/../members/sidewayz-s14.html) - ive redone all the grounds already so im pretty sure thats fine

96Turbo (http://zilvia.net/f/../members/96turbo.html) - i havent cleaned out the iacv lately so ill be doing that sometime this week

fliprayzin240sx (http://zilvia.net/f/../members/fliprayzin240sx.html) - and yes they do have a 12mm lift but i just dont remember noticing it this much before like i do now