i just installed an intake manifold on my d15b7 and everything was fine at first and then it started to idle funny, most of the time it will do it but sometimes it wont.. it jumps up and down about 500 rpms. im guessing its an air leak somewhere but i cant find one. any suggestions on what it might be?

 

either air in the coolant. or your iac

 

go over all the bolts again. and the nuts holding the manifold on

 

If you have a leak in the intake, your motor would be reving high up there. It should fluctuate, meaning air bubbles in the cooling system, or IACV

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SiKnezzX408 &raquo;</TD></TR><TR><TD CLASS="quote">either air in the coolant. or your iac

</TD></TR></TABLE>


i know i need a new radiator cap cuz the seal on mine rotted and broke off.. im guessing thats the problem then?

 

No, that wouldn't cause the problem. You could have no radiator cap on and it would idle fine. Bleed the coolant. The most basic way is to take off the radiator cap when the engine is cold, then start the car and let it run until it's fully warmed up (fan has come on twice).

 

how will i know when the line is completely done bleeding?

 

???

 

anyone?

 

you'll know it's done when the fan comes on twice! just like what suspendedHatch said.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SiKnezzX408 &raquo;</TD></TR><TR><TD CLASS="quote">you'll know it's done when the fan comes on twice! just like what suspendedHatch said.</TD></TR></TABLE>

i thought he meant thats when the engine will be fully warmed up.. i didnt know that was for the coolant

 

try to adjust the throttle.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by aznboyhoy &raquo;</TD></TR><TR><TD CLASS="quote">try to adjust the throttle.</TD></TR></TABLE>

wat does this have to do with the idle

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cleanej2 &raquo;</TD></TR><TR><TD CLASS="quote">

i thought he meant thats when the engine will be fully warmed up.. i didnt know that was for the coolant</TD></TR></TABLE>

yup.. the thermostat reaches certain temperature opening the thermostat, and thats when the fan comes on, pushing out air bubbles in the cooling system, when the cap is open. thats when you'll start to see coolant slowly flowing out when fan turns on.