Hey guys i just got my car back from the shop. The engine was rebuilt with new pistons and a new head. The engine(B18b1) consists of a 95 LS short block and a 99 b20 head.

Now when i got it back, there was no hose that connects from the head (see picture 1 circled in red) to the intake (see picture 2 circled in red)

#1
#2

So i bought a rubber hose from Home Depot and connected these two parts. My engine started to idle around 2k... WHY?

When the rubber hose is NOT connected, my engine idles below 1k and fluctuates back and forth like it WANTS to die.

Can anyone explain/help me fix this problem???

TIA

 

look around for other hoses that aren't connected. sounds like a vac leak

also, take it back to the shop, they are responsible for getting it to run right.

 

what should i do about the hose that isnt connected already? leave it?

 

well how would it be if stock, connected right?

 

well when i leave it connected it idles at 2k which is really weird..

 

is it only when cold?

 

nah it was hot as hell yesterday and it did it also

 

sounds like a vacuum leak, or a damaged IACV or FITV, clean those two parts out with carb cleaner


the line you showed in the pictures does not affect idle, it simply recirculates blow by from the head back into the intake manfiold, your car can run perfectly without it

 

using photoshop can u indicate where my iacv & fitv is? and simple procedures to cleaning it with carb cleaner?

TIA