hey guys, i have a trd supercharger on my car, and it ran fine when i got it, but since then i put on the nst 9.5lb boost pulley, and its acting really wierd now, basically when i come 2 a complete stop the idle starts jumpin around from like 500 to like 750, and it starts to make a rattleing noise, but it only does it at a complete stop, i can coast it for days and it doesnt do it, any u guys got an idea what it could be?

o and i just got an aem uego wideband so ill get it hooked up soon to see if maybe its running to lean or not, but other than that what could it be?

 

check your vac hoses and make sure nothing slipped off near the Bypass Valve

 

I agree. Only thing I can think of is you having a vacuum leak somewhere. Possible that the charge pipe is loose but it doubt that one lol. You'd really know if it were the main pipe.

 

Same thing happened to me after I got my engine cleanup by a local shop. Started it up and the tach was all over the place. Poped the hood and sure enough, they knocked off the hose on the T-fitting form the BVP to the throttle body.

 

i just checked my hoses and none of them were loose, i checked all the clamps and they were good to. and the bpv on the trd s/c would be the little black can coming off the hose going to the tb right? lol little new to FI. well im pretty sure it is, and it was good to, any other ideas guys?

 

think maybe your belt is slipping? Just throwing out possibilities here.

 

u know when i rev higher rpms the belt does give a screatch, could that cause it just at idle though? how can i stop it?

 

try letting your car warm up first befor u go that may help. mine dose the same thing only if its little chile out.

 

yeah i always let the car warm for like 10 min. or as long as it takes, and it definately does slip a lot when its cold. but it idles funny all the time, it almost feels like it wants to stall at the stop, but it never has though.

 

Check your spark plugs. Let us know what you find out.

 

alright will do, dont have time today but ill get on it as soon as i can, by chance do u know what size socket u need for the plugs? i gotta check if i have the right spark plug socket.

 

5/8 spark-plug socket with a 6" extension is what I use.

 

The vacuum line is what I was referring too. It's not held on be any clamps, those would be the bigger hoses. Then again, I never heard a screatch.

 

really does sound like a vacuum, if it only happens at idle when on the brakes....

i think spark plugs would be more a problem at all RPMS...

but hey who knows...cars are known to be wierd

 

so i know that i have belt slippage, but how do u guys go about stopping it, i tried belt conditioner and it didnt work.

 

maybe tighten it up.

 

how do u tighten it, i thought the tensioner like sets it where it has 2 be on its own

 

did you use the right size belt? make sure the keyway is in there right also, and try to disconnect your batt.. and wait for 10mins and put it back on.. also check wat ever you or where you brought it to did to it.. the nst pully will make a lil more noise i hear more of the charger now.. u can also try this too.. for checkin vac. leaks turn ur car on and get a bottle of soap and spray it all over the hoses and if you see bubbles then theres your leak.. also check your maf.. i doubt that would be it but still check didnt have enough info.. from wat else have you done to it that same time you or who ever installed your pully.. the tensioner is self adjustment.. there is also a possible chance that your tensioner is no good.. to check that get a 19mm socket with a serp belt tool and pull down on it if its goes up and down with no effort then its no good.. should really check every 15k or 1 year... also it mayb normal you just didnt notice until now.. cause your rpm does goes up and down with only 250rpm difference you should be ok... and you could try to use a fuel cleaner.. may help out... good luck

 

yeah i got the right belt, nst shipped it to me with the pullies, and i did disconect the batt. but ill try it again. the only thing im somewhat unsure of is the pulley key, is there a special way it should be? i just put the pulley on and slid it in.

 

theres no special way go put the keyway in just has to go in thats it.. and wat do you mean pullies? do you have more then just nst 9.5lbs pully?